SERVICE INSTRUCTION

HYBRID FLEX

INVERTER SYSTEM

Models Indoor unit Outdoor unit

AOU48RLXFZ1

INVERTER MULTI

SERVICE

INSTRUCTION

R410A

Slim Duct / Compact Cassette

Compact Wall Mounted /

Wall Mounted / Floor

ARU7RLF

ARU9RLF

ARU12RLF

ARU18RLF

ARU24RLF

AUU7RLF

AUU9RLF

AUU12RLF

AUU18RLF

ASU7RLF

ASU9RLF

ASU12RLF

ASU18RLF

ASU24RLF

ASU9RLS2

ASU12RLS2

ASU15RLS2

ASU7RLF1

ASU9RLF1

ASU12RLF1

AGU9RLF

AGU12RLF

AGU15RLF

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

1-1. COOLING AND DRY OPERATION..........................................................................

1-3. AUTO CHANGEOVER OPERATION.......................................................................

1-2. HEATING OPERATION...........................................................................................

1-6. OUTDOOR FAN CONTROL....................................................................................

1-4. INDOOR FAN CONTROL........................................................................................

1-8. TIMER OPERATION CONTROL.............................................................................

1-7. COMPRESSOR CONTROL.....................................................................................

1-10. TEST OPERATION CONTROL..............................................................................

1-9. ELECTRONIC EXPANSION VALVE CONTROL.....................................................

1-11. 4-WAY VALVE EXTENSION SELECT...................................................................

1-14. FORCED COOLING OPERATION .......................................................................

1-13. MANUAL AUTO OPERATION...............................................................................

1-12. AUTO RESTART....................................................................................................

1-22. EXTERNAL ELECTRICAL HEATER CONTROL(For AR type).............................

1-15. COMPRESSOR PREHEATING.............................................................................

1-17. DEFROST OPERATION CONTROL.....................................................................

1-28. VARIOUS PROTECTIONS....................................................................................

01-01

01-02

01-03

01-05

01-18

01-19

01-21

01-24

01-25

01-27

01-28

01-34

01-38

01-27

2-1. SERVICE MAINTENANCE FOR HYBRID FLEX INVERTER SYSTEM................

2. TROUBLE SHOOTING

2-3. ABNORMAL OPERATION......................................................................................

2-4. TROUBLE SHOOTING...........................................................................................

2-5. SERVICE PARTS INFORMATION.........................................................................

02-01

02-07

02-05

02-16

3. DISASSENBLLY PARTS

01-28

1-16. MINIMUM HEAT OPERATION..............................................................................

01-29

1-5. LOUVER CONTROL................................................................................................ 01-13

01-28

1-18. OFF DEFROST OPERATION CONTROL.............................................................

01-31

1-20. OIL RECOVERY OPERATION..............................................................................

01-32

1-19. FAN DEFROST OPERATION CONTROL.............................................................

01-33

1-21. FRESH AIR CONTROL(For AU / AR type)............................................................

01-34

1-23. POWERFUL OPERATION (For ASU*RLS/ ASU*RLF1/ AGU*RLF type)..............

01-34

1-24. DRAIN PUMP OPERATION...................................................................................01-35

1-25. ECONOMY OPERATION.......................................................................................01-36

1-26. ENERGY SAVING PEAK CUT FUNCTION........................................................... 01-37

1-27. LOW NOISE MODE............................................................................................... 01-37

2-2. NORMAL OPERATION..........................................................................................

3-1. DISASSEMBLY PROCESS FOR OUTDOOR UNIT................................................

3-2. DISASSEMBLY PROCESS FOR OUT BRANCH BOX............................................

03-17

03-01

02-68

Hybrid Flex Inverter System

1 . DESCRIPTION OF EACH

CONTROL OPERATION

1-1. COOLING AND DRY OPERATION

1-1-1. COOLING AND DRY CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive

difference or variation between a set temperature and present room temperature, and controls

the operation speed of the compressor.

The outdoor unit operates according to the highest request capacity of indoor unit to meet the demand

capacity of all the indoor units.The capacity control of the low request capacity indoor unit is controlled

by Branch box EEV.

Minimum Maximum

( Table 1 : Compressor speed range )

01-01

AOU48RLXFZ1

18rps

90rps

When the start-up control finished, the outdoor unit starts the target low pressure control.

The outdoor unit selects the target low pressure within the following range,

it is decided by the highest request capacity from indoor units.

275PSI

235PSI

478PSI

338PSI

The outdoor fan speed is controlled to keep the high pressure to the constant range for stabilizing

the distribution performance.

( Fig. 1 : Target high pressure range)

< Target high pressure control >

< Target low pressure control >

( Fig. 2 : Target low pressure range)

119PSI

184PSI

Target high pressure

Target low pressure

High pressure

Outdoor

temperature

1-2. HEATING OPERATION

1-2-1. HEATING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit body will usually perceive

difference or variation between a set temperature and present room temperature,

and controls the operation speed of the compressor.

The outdoor unit operates according to the highest request capacity of indoor unit to meet the demand

capacity of all the indoor units.

The capacity control of the low request capacity indoor unit is controlled by Branch box EEV.

( Table 2 : Compressor speed range )

01-02

Minimum Maximum

AOU48RLXFZ1

18rps

96rps

123PSI

109PSI

The outdoor fan speed is controlled to keep the low pressure to the constant range for the following reasons.

1. Frost prevention

2. Low pressure over rise prevention

( Fig. 5 : Target low pressure range)

< Target low pressure control >

Target low pressure

When the start-up control finished, the outdoor unit starts the target high pressure control.

The outdoor unit selects the target high pressure within the following range,

it is decided by the highest request capacity from indoor units.

< Target high pressure control >

( Fig. 3 : Target high pressure range

for NORMAL HEATING OPERATION)

328PSI

451PSI

Target high pressure

190PSI

272PSI

( Fig. 4 : Target high pressure range

for MIN. HEAT OPERATION)

Target high pressure

1-3. AUTO CHANGEOVER OPERATION

When the air conditioner is set to the Auto mode by remote controller, operation starts in the optimum

mode from among the Heating, Cooling, Dry and Monitoring mode. During operation, the

optimum mode is automatically switched in accordance with temperature changes. The temperature

can be set between 64°F(18°C) and 88°F(30°C) in 2°F(1°C) steps.

When operation starts, indoor fan and outdoor fan are operated for around 3 minutes.

Room temperature and outdoor temperature are sensed, and the operation mode is selected

in accordance with the table below. <Monitoring mode>

Cooling mode

77°F (25°C)

Heating mode

( Table 3 : Operation mode selection table )

Room temperature (TR)

TR> Ts+4°F(+2°C)

Ts+4°F(+2°C) TR Ts -4°F(-2°C)

*Middle zone

TR < Ts -4°F(-2°C) Heating

When Cooling or Dry mode was selected at and air flow mode is Auto, the air conditioner operates as follow.

The same operation as COOLING OPERATION AND DRY OPERATION of page 01-01 is performed.

When the room temperature has remained at set temperature -3°F(-1.5°C), operation is automatically

switched to Dry mode.

If the room temperature reaches set temperature +4°F(+2°C) during Dry mode, operation returns to Cooling.

When Heating was selected at , the same operation as HEATING OPERATION of page

01-02 is performed.

When the compressor was stopped for 6 consecutive minutes by the temperature control function

after the Cooling(Auto:Dry) or Heating mode was selected at above, operation is switched

to Monitoring and the operation mode is selected again.

( Fig. 6 : Outdoor temperature zone selection )

01-03

Cooling

(Autmatic dry)

Operation mode

*If it's Middle zone, operation mode of indoor unit is selected as below.

(1). Same operation mode is selected as outdoor unit.

If outdoor unit is operating in Cooling, Dry, and Heating mode,

indoor unit will be operated by the same operation mode.

(2). Selected by the outdoor temperature.

If outdoor unit is operating in other than Cooling, Dry, and Heating mode,

indoor unit will be operated according to the outdoor temperature as below.

Cooling

Dry(X zone)

Dry(J zone)

Compressor stop

When the room

temperature drops

When the room

temperature rises

Ts +4°F(+2°C)

Ts -1°F(-0.5°C)

Ts -3°F(-1.5°C)

Ts +2°F(+1°C)

Ts -3°F(-1.5°C)

Ts -5°F(-2.5°C)

( Fig.7 : Auto changeover : Cooling - Dry )

TR : Room temperature

Ts : Setting temperature

TR : Room temperature

Ts : Setting temperature

( Air flow mode : Auto )

01-04

START

Room temp.

Ts+4°F(+2

°C)?

COOLING (AUTO:DRY)

OPERATION

HEATING OPERATION

YES

AUTO CHANGEOVER operation flow chart

TS : Setting temperature

Room temp.

Ts -4°F(-2

°C)?

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

Thermostat remains

in OFF state for 6 minutes or

longer?

System stops

or operation command other than

auto changeover operation?

Middle zone

Operation mode of

outdoor unit : Cooling or Dry?

YES

Operation mode of

outdoor unit : Heating?

YES

Outdoor temperature

°F(25°C)?

YES

1-4. INDOOR FAN CONTROL

01-05

1. Fan speed

( Table 4 : Indoor fan speed table)

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

ASU7RLF

1050

1000

950

850

720

600

480

1050

950

850

710

600

X, J zone:710

ASU9RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1100

1040

980

850

720

600

480

1100

980

850

710

600

X, J zone:710

ASU12RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1200

1130

1050

910

720

600

480

1200

1050

880

710

600

X, J zone:710

ASU18RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1260

1120

1020

900

790

680

480

1260

1020

900

770

680

X, J zone:770

ASU24RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1430

1320

1220

1020

900

720

480

1480

1220

1020

900

720

X, J zone:900

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.

(Hi > Me, Me > Lo, Quiet > Soft Quiet)

(rpm) (rpm)

(rpm)

AUU12RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

650

620

580

520

460

400

300

660

580

520

460

400

X, J zone:460

AUU18RLF

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

X, J zone:460

840

800

750

650

500

400

300

790

660

570

460

400

01-06

(rpm)

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

AUU9RLF

590

570

540

490

440

400

300

590

540

490

440

400

X, J zone:440

(rpm)

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

AUU7RLF

590

570

540

490

440

400

300

590

540

490

440

400

X, J zone:440

(rpm)

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.

(Hi > Me, Me > Lo, Quiet > Soft Quiet)

ARU7RLF (Static pressure:25Pa)

Quiet

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

X, J zone:880

1160

1000

940

880

550

1160

1000

940

880

500

ARU12RLF (Static pressure:25Pa)

Quiet

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

X, J zone:1030

1340

1240

1140

1030

500

1340

1240

1140

1030

500

ARU18RLF (Static pressure:25Pa)

Quiet

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1380

1300

1220

1140

600

1380

1300

1220

1140

600

X, J zone:1140

ARU24RLF (Static pressure:25Pa)

Quiet

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

X, J zone:1180

1460

1360

1260

1180

600

1460

1360

1260

1180

600

(rpm)

ARU9RLF (Static pressure:25Pa)

Quiet

S-Lo

Quiet

*Soft Quiet

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

X, J zone:960

1260

1160

1060

960

500

1260

1160

1060

960

500

(rpm)

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.

(Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-07

01-08

Operation mode Air flow mode

Speed

Cooling/ Fan

Heating

Dry

X zone: 750

J zone: 750

Upper& Lower

air flow mode

Upper

air flow mode

Quiet

S-Lo

Cool air prevention

(Upper/ Lower)

1230/ 1040

1120/ 950

1000/ 850

860/ 730

660/ 560

1300

1230

1090

940

750

680

1230/ 1040

1120/ 950

960/ 820

820/ 700

660/ 560

570/ 480

660/ 560

1300

1230

1070

910

750

680

---- / ----

AGU9RLF

Powerful

S-Lo

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.

(Hi > Me, Me > Lo, Quiet > Soft Quiet)

Soft Quiet

(rpm)

Operation mode Air flow mode

Speed

Cooling/ Fan

Heating

Dry

X zone: 750

J zone: 750

Upper& Lower

air flow mode

Upper

air flow mode

Quiet

S-Lo

Cool air prevention

(Upper/ Lower)

1350/ 1150

1240/ 1040

1080/ 920

910/ 770

660/ 560

1370

1300

1140

980

750

680

1350/ 1150

1240/ 1040

1050/ 890

860/ 730

660/ 560

570/ 480

660/ 560

1370

1300

1120

930

750

680

---- / ----

AGU12RLF

Powerful

S-Lo

Soft Quiet

(rpm)

Operation mode Air flow mode

Speed

Cooling/ Fan

Heating

Dry

X zone: 750

J zone: 750

Upper& Lower

air flow mode

Upper

air flow mode

Quiet

S-Lo

Cool air prevention

(Upper/ Lower)

1440/ 1230

1330/ 1120

1140/ 970

940/ 800

660/ 560

1440

1370

1180

1020

750

680

1440/ 1230

1330/ 1120

1100/ 930

890/ 750

660/ 560

570/ 480

660/ 560

1440

1370

1160

960

750

680

---- / ----

AGU15RLF

Powerful

S-Lo

Soft Quiet

(rpm)

Auto

ASU15RLS2

ASU9RLS2

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1080

1030

950

850

650

610

570

1080

1030

950

850

650

610

570

X, J zone:650

ASU12RLS2

01-09

(rpm)

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1160

1110

1030

930

650

610

570

1160

1110

1030

930

650

610

570

X, J zone:650

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1230

1180

1080

1010

790

610

570

1230

1180

1080

980

740

710

570

X, J zone:740

ASU7RLF1

(rpm)

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1090

1050

1000

950

850

710

600

480

1090

1050

950

850

680

600

480

X, J zone:680

ASU9RLF1

(rpm)

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1140

1090

1040

980

850

710

600

480

1140

1090

980

850

680

600

480

X, J zone:680

ASU12RLF1

(rpm)

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo

Auto

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Fan Speed

1240

1190

1120

1050

910

710

600

480

1240

1190

1050

880

680

600

480

X, J zone:680

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs.

(Hi > Me, Me > Lo, Quiet > Soft Quiet)

The airflow can be switched in 5 steps such as Auto, Quiet, Lo, Me, Hi,

while the indoor fan only runs.

When Fan mode is set at (Auto), it operates on (Me) Fan Speed.

2. FAN OPERATION

3. COOLING OPERATION (Auto : Cooling)

Switch the airflow [Auto], and the indoor fan will run according to a room temperature,

as shown in Fig 8.

On the other hand, if switched in [Hi] [Quiet], the indoor fan will run at a constant airflow of [Cooling]

operation modes Quiet, Lo, Me, Hi.

( Fig.8 : Airflow change - over )

When the room

temperature rises

When the room

temperature drops

TR : Room temperature

Ts : Setting temperature

TR-Ts > +4°F(+2°C)

°F(+1°C) > TR-Ts

°F(+2°C) > TR-Ts > +2°F(+1°C)

TR-Ts > +5

°F(+2.5°C)

°F(+1.5°C) > TR-Ts

°F(+2.5°C) > TR-Ts > +3°F(+1.5°C)

4. DRY OPERATION (Auto : Dry)

During the dry operation, the fan speed setting can not be changed,it operates automatically as shown in Fig. 9

Room temperature variation which the room temperature sensor of the indoor unit body has detected.

( Fig. 9 : Indoor fan control )

10 30 60 180 60 180 60 10 30 (sec)

Fan OFF

OFF

< Compressor >

Setting air flow

S-Lo

< Indoor fan air flow mode >

< All models >

01-10

The maximum value of the indoor fan speed is set as shown in Fig .11, based on the detected

temperature by the indoor heat exchanger sensor in heating mode.

< ASU type >

01-11

5. HEATING OPERATION

Switch the airflow [Auto], and the indoor fan will run according to a room temperature,

as shown in Fig. 10.

On the other hand, if switched in [Hi] [Quiet], the indoor fan will run at a constant airflow

of [Heat] operation modes Quiet, Lo, Me, Hi, as shown in Table 2.

6. COOL AIR PREVENTION CONTROL (For Heating and Min. Heat operation)

( Fig. 10 : Airflow change - over ( Heating : Auto ) )

TR-Ts > -3°F(-1.5°C)

-5

°F(-2.5°C) > TR-Ts

-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)

TR-Ts > -2

°F(-1°C)

-4

°F(-2°C) > TR-Ts

-2

°F(-1°C) > TR-Ts > -4°F(-2°C)

When the room

temperature rises

When the room

temperature drops

TR : Room temperature

Ts : Setting temperature

Me+

107.6°F(42°C)

°F

(30°C)

93.2

°F

(34°C)

When Indoor heat exchanger

temperature rises

When Indoor heat exchanger

temperature drops

*Me+ or setting

FAN mode

Cool air

prevention

102.2

°F

(39°C)

98.6

°F

(37°C)

98.6

°F

(37°C)

89.6

°F

(32°C)

82.4

°F

(28°C)

S-Lo

*Lo or setting

FAN mode

84.2°F

(29°C)

When Indoor heat exchanger

temperature rises

When Indoor heat exchanger

temperature drops

*Lo or setting

FAN mode

98.6°F

(37°C)

89.6

°F

(32°C)

75.2

°F

(24°C)

*Hi or setting

FAN mode

S-Lo

During NORMAL HEATING OPERATION

< ARU type >

*Lower speed is selected

Field setting is necessary at AR and AU type as "Cool air prevention : effective"

TR-Ts > -3°F(-1.5°C)

-5

°F(-2.5°C) > TR-Ts

-3°F(-1.5°C) > TR-Ts > -5°F(-2.5°C)

TR-Ts > -2

°F(-1°C)

-4

°F(-2°C) > TR-Ts

-2

°F(-1°C) > TR-Ts > -4°F(-2°C)

When the room

temperature rises

When the room

temperature drops

< AUU/ ARU/ AGU type >

< ASU type >

( Fig. 11 : Airflow change - over for cool air prevention)

*Lower speed is selected

01-12

93.2°F

(34°C)

When Indoor heat exchanger

temperature rises

102.2°F

(39°C)

Auto

When Indoor

heat exchanger

temperature rises

89.6°F

(32°C)

98.6°F

(37°C)

During MIN. HEAT OPERATION

< ASU / AUU type >

< ARU type >

107.6°F

(42°C)

93.2°F

(34°C)

When Indoor heat exchanger

temperature rises

*Me+ or setting

FAN mode

Cool air

prevention

102.2°F

(39°C)

98.6°F

(37°C)

S-Lo

*Lo or setting

FAN mode

< AGU type >

*Lower speed is selected

107.6°F

(42°C)

87.8°F

(31°C)

When Indoor heat exchanger

temperature rises

*Me or setting

FAN mode

Cool air

prevention

102.2°F

(39°C)

93.2°F

(34°C)

S-Lo

*Lo or setting

FAN mode

*Lower speed is selected

87.8°F

(31°C)

When Indoor heat exchanger

temperature rises

102.2°F

(39°C)

Auto

< AGU type >

When Indoor heat exchanger

temperature drops

75.2°F

(24°C)

84.2°F

(29°C)

98.6°F

(37°C)

When Indoor heat exchanger

temperature drops

86.0°F

(30°C)

75.2°F

(24°C)

89.6°F

(32°C)

98.6°F

(37°C)

When Indoor heat exchanger

temperature drops

86.0°F

(30°C)

< AUU type >

Auto

When Indoor heat exchanger

temperature drops

When Indoor heat exchanger

temperature drops

1-5. LOUVER CONTROL

Each time the button is pressed, the air direction range will change as follow:

(Function Range)

(Table9 : Recommended Operation Range)

01-13

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Cooling / Dry mode : Horizontal flow

Heating mode : Downward flow ASU7/9/12: , ASU18/24:

When the temperature of the air being blown out is low at the start of heating operation or during

defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During use of the Cooling and Dry modes, do not set the Air Flow Direction Louver in the Heating

range ( ) for long period of time, since water vapor many condense near the outlet louvers and

drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow

Direction Louvers are left in the heating range for around 30 minutes, they will automatically

return to position .

(Fig. 12 : Virtical Air Direction Range)

Cooling / Heating / Dry mode / Fan mode

Cooling mode / Dry mode / Fan mode( ) :

Heating mode / Fan mode( ) : ASU7/9/12 [ ], ASU18/24 [ ]

3. SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing.

(Swinging Range)

1 3

Vertical Airflow Swing Operation

Horizontal Airflow Swing Operation (For ASU18/24RLF )

When the swing signal is received from the remote controller, the horizontal louver starts to swing.

All mode :

(Swinging Range)

Vertical and Horizontal Airflow Swing Operation

When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted

and it stops at either upper end or bottom end.

When the indoor fan is S-Lo or Stop mode, the swing operation is interrupted

and it stops at either upper end or bottom end.

When the horizontal swing signal is input from remote control, the combination of the vertical

and horizontal swing operation is performed.

2. HORIZONTAL LOUVER CONTROL (For ASU18/ 24RLF)

Horizontal Louver

Each time the button is pressed, the air directionrange will change as follows.

(Function Range)

Cooling / Heating / Dry mode / Fan mode

(Fig. 13 : Horizontal Air Direction Range)

Power Diffuser doesn't swing in any swing operation.

For Compact Wall Mounted Type, Wall Mounted Type < ASU7/ 9/ 12/ 18/ 24RLF >

1. VERTICAL LOUVER CONTROL

Power DiffuserVertical Louver

Vertical Louver

ASU7/9/12RLF changes by manual.

1. VERTICAL LOUVER CONTROL

Each time the button is pressed, the air direction range will change as follow:

(Function Range)

01-14

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Dry mode

Horizontal flow

Heating mode Downward flow

When the swing signal is received from the remote controller, the vertical louver starts to swing.

(Fig. 14 : Virtical Air Direction Range)

Cooling / Dry mode

Fan mode ( )

Types of Air flow Direction Setting:

, , : During Cooling/Dry modes

, , , : During Heating

The Remote Controller's display does not change.

During AUTO mode operation, for the first a few minutes after beginning operation,

air-flow will be horizontal 1; the air direction cannot be adjusted during this period.

The air flow direction setting will temporarily become 1 when the temperature of the air -flow is

low at the start of the Heating mode.

Range

Hea

ting mod

Fan mode

( )

The SWING operation may stop temporarily when the air conditioner’s fan is not operating,

or when operating at very low speeds.

2. ADJUST THE RIGHT-LEFT LOUVERS

Move the Right-Left louvers to adjust air flow in the direction you prefer.

Knob (2 places)

Right-Left Louvers

To select Vertical Airflow Swing Operation

(No function)

For Wall Mounted Type < ASU9/ 12/ 15RLS2 >

To select Horizontal Airflow Swing Operation

Knob

Use the air direction adjustments within the ranges shown above.

(Table 5 : Swinging Range)

Cooling /

3. SWING OPERATION

1. VERTICAL LOUVER CONTROL

3. SWING OPERATION

Each time the button is pressed, the air direction range will change as follow:

(Function Range)

01-15

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Cooling / Dry mode

Horizontal flow

Heating mode Downward flow

When the swing signal is received from the remote controller, the vertical louver starts to swing.

(Table 6 : Swinging Range)

(Fig.15 Virtical Air Direction Range)

Cooling / Dry mode

Fan mode ( )

The Remote Controller's display does not change.

Use the air direction adjustments within the ranges shown above.

If you set the angle to position 4.7 for more than 30 minutes in COOL or

DRY mode, they automatically return to position 3.

In COOL or DRY mode, if the angle is set to position 4.7 for many hours,

condensation may be formed, and the drips may wet your property.

During AUTO or Heating mode operation, for the first a few minutes after beginning operation,

air-flow will be horizontal 1; the air direction cannot be adjusted during this period.

The air flow direction setting will temporarily become 1 when the temperature of the air -flow is

low at the start of the Heating mode.

Range

ting mode

Fan mode (

)

The SWING operation may stop temporarily when the air conditioner’s fan is not operating,

or when operating at very low speeds.

2. ADJUST THE RIGHT-LEFT LOUVERS

Move the Right-Left louvers to adjust air flow

in the direction you prefer.

To select V ertical Airflow Swing Operation

To select Horizontal Airflow Swing Operation

(No function)

Right-Left Louvers

Knob

For Wall Mounted Type < ASU7/ 9/ 12RLF1 >

01-16

1. VERTICAL LOUVER CONTROL

Each time the button is pressed, the air direction range will change as follows:

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation

(Function Range)

(Fig. 16 : Air Direction Range)

(Operation Range)

During COOLING / HEATING / DRY / FAN mode :

selected.

COOLING / DRY / FAN mode

Horizontal flow

HEATING mode

Downward flow

2. SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing.

The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted

and the louver stops at the memorized position.

( Stop mode means Operation stop.)

During AUTO mode operation, for the first minute after start-up, air-flow will be horizontal

; the air direction cannot be adjusted during this period.

The type of operation

COOLING / HEATING / DRY / FAN

Range of swing

For Compact Cassette Type < AUU7/ 9/ 12/ 18RLF >

1234

(Table 7 : Swinging Range)

01-17

For Floor Type < AGU9/ 12/ 15RLF >

1. VERTICAL LOUVER CONTROL

Each time the button is pressed,

the air direction range will change as follows:

Use the air direction adjustments within the ranges shown above.

The vertical airflow direction is set automatically as shown, in accordance with the type of operation selected.

Cooling / Dry / Fan mode

Horizontal flow

Heating mode

Downward flow

When the temperature of the air being blown out is low at the start of heating operation or during

defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically

becomes , and it cannot be adjusted.

(Function and Operation Range)

When the swing signal is received from the remote controller, the vertical louver starts to swing .

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrrupted

and it stops at either upper end or bottom end.

( Fig. 17 : Air Direction Range)

Cooling / Heating / Dry / Fan mode :

(Swinging Range)

2. SWING OPERATION

1-6. OUTDOOR FAN CONTROL

( Table 8 : Outdoor fan speed table)

01-18

1. Fan speed table

Table 8 shows the fan speed of the outdoor unit.

[rpm]

AOU48RLXFZ1

Fan step

250

290

340

390

460

580

690

800

890

910

950

Fan speed

If the fan motor is running over than 400rpm, it start up process is stopped in all conditions. [ Prevent the big wind operation ]

When the fan motor is stopped, it can not restart for 10 seconds.

< Heating mode >

3. Initial fan speed control

< Cooling and Dry mode >

690rpm

50°F(10°C)

Outdoor

temperature

890rpm

86°F(30°C)

580 ~ 890rpm

Outdoor

temperature

460 ~ 910rpm

41°F(5°C)

460 ~ 950rpm

Outdoor

temperature

2. Limit of fan speed range

< Cooling and Dry mode >

Fig. 18 shows the limit of fan speed range changes by outdoor temperature.

< Heating mode >

Fixed at 690rpm

390rpm

Initial fan speed is decided by outdoor temperature.

( Fig. 18 : Limit of fan speed range )

( Fig. 19 : Initial fan speed range )

Even if during EEV initialization, outdoor unit fan starts.

68°F(20°C)

250 ~ 890rpm

50°F(10°C)

0 ~ 890rpm

1-7. COMPRESSOR CONTROL

1. OPERATION SPEED RANGE

The operation speed of the compressor is different based on the operation mode as

shown in theTable 9.

Heating

Minimum Maximum

( Table 9 : Compressor operation speed range )

2. OPERATION SPEED CONTROL AT START-UP

The compressor speed soon after the start-up is controlled for

( Fig. 20 : Pttern 1)

01-19

180 240

AOU48RLXFZ1

18rps 96rps

2-1 Cooling and Dry start-up procces

< Pattern 1 >

Dry / Cooling

Minimum Maximum

18rps

90rps

(rps)

Upper

limit

speed

(sec)300 330

180 240

(rps)

Upper

limit

speed

(sec)300 360

390

Elapsed time

< Pattern 2 >

If it does not meet the condition of pattern 2, the compressor will start at pattern 1.

( Fig. 21 : Pattern 2)

Over 32°C

Below 3 hours

Target pressure control

Start-up procces 2

Oil recovery / Defrost

Compressor control before

operation stops

Stop time of

compressor

Compressor

temperature

Condition

If it meets one of the following conditions, the compressor will start at pattern 2.

( Fig. 22 : Heating start-up pattern 1)

690 720

2-2 Heating start-up procces

< Pattern 1 >

(rps)

Upper

limit

speed

(sec)780 840

Elapsed time

( Fig. 23 : Heating start-up pattern 2)

150 210

(rps)

Upper

limit

speed

(sec)270 330

390

Elapsed time

< Pattern 2 >

3. LIMIT OF THE COMPRESSOR SPEED RANGE

The compressor speed range is limited by outdoor temperature as shown in Fig. 24

21 ~ 90rps

104°F(40°C)

18 ~ 90rps

50°F(10°C)

25 ~ 90rps

23°F(-5°C)

27 ~ 90rps

14°F(-10°C)

* 0rps

*Protection stop for low outdoor temperature.

It will be released when outdoor temperature

becomes over than 14°F(-10°C)

Outdoor

temperature

21 ~ 90rps

53.6°F(12°C)

18 ~ 96rps

41°F(5°C)

23 ~ 96rps

5°F(-15°C)

25 ~ 96rps

Outdoor

temperature

< Cooling and Dry mode >

< Heating mode >

( Fig. 24 : Limit of the compressor speed range )

01-20

If it does not meet the condition of pattern 2, the compressor will start at pattern 1.

Over 89.6°F

(32°C)

Below 3 hours

Target pressure control

Start-up procces 2

Oil recovery / Defrost

Compressor control before

operation stops

Stop time of

compressor

Compressor

temperature

Condition

If it meets one of the following conditions, the compressor will start at pattern 2.

1-8. TIMER OPEARTION CONTROL

1. ON / OFF TIMER

The Table 10 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

OFF timer : When the clock reaches the set time, the air conditioner will be turned off.

Operation mode

Stop mode

Set time of timer

ON timer : When the clock reaches the set time, the air conditioner will be turned on.

Operation mode

Stop mode

Set time of timer

The program timer allows the OFF timer and ON timer to be used in combination one time.

Operation mode

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest

to the clock's current timer setting.

The order of operations is indicated by the arrow in the remote control unit's display.

SLEEP timer operation cannot be combined with ON timer operation.

( Table 10 : Timer setting )

2. PROGRAM TIMER

Stop mode

Operation mode

Set time Set time Set time Set time

01-21

1-8-1 WIRELESS REMOTE CONTROLLER

3. SLEEP TIMER

Set temperature rises

( Ts : Set temperature )

Stop of operation

Set temperature lowers

( Ts : Set temperature )

Stop of operation

+2°F (+1°C)

+4°F (+2°C)

Set

60min

Set

30min

01-22

-2 F(-1 C)

-4 F(-2 C)

-6 F(-3 C)

-8 F(-4 C)

If the sleep is set, the room temperature is monitored and the operation is stopped automatically.

If the operation mode or the set temperature is change after the sleep timer is set, the operation is

continued according to the changed setting of the sleep timer from that time ON.

In the cooling operation mode

When the sleep timer is set, the setting temperature is increased 2 F(1 C).

It increases the setting temperature another 2 F(1 C) after 1 hour.

After that, the setting temperature is not changed and the operation is stopped at the time

of timer setting.

In the heating operation mode

When the sleep timer is set, the setting temperature is decreased 2 F(1 C).

It decreases the setting temperature another 2 F(1 C) every 30 minutes.

Upon lowering 4deg C, the setting temperature is not changed and the operation stops at

the time of timer setting.

01-23

1-8-2 WIRED REMOTE CONTROLLER

The Table 11 shows the available timer setting based on the product model.

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

( Table 11 : Timer setting )

1. ON TIMER / OFF TIMER

Same to 1-8-1 ON / OFF TIMER and shown in those.

2. WEEKLY TIMER

This timer function can set operation times of the each day of the week.

All days can be set together,the weekly timer can be used to repeat the timer setting for all of the days.

3. TEMPERATURE SET BACK TIMER

This timer function can change setting temperature of setting operation times of the each day of the week.

This can be together with other timer setting.

Normal tmp.

OFF

Setting day Setting day Setting day

ON OFF ON OFF ON OFF

Set time Set time

Set back tmp.

Set time Set time

1-9. ELECTRONIC EXPANSION VALVE CONTROL

01-24

The most proper opening of the electronic expansion valve is calculated and controlled under the

present operating condition based on the following values.

The compressor frequency, the temperatures detected by the discharge temperature sensor, the

indoor heat exchanger sensor, the outdoor heat exchanger sensor, and the outdoor temperature

sensor.

Initialization (Input of 528 pulses toward closing direction) is operated under the following conditions.

It apply to all of EEV.

Power-on.

4 hours has passed from the last initialization, and when the compressor starts.

(Table 12 : Pulse range of outdoor unit EEV)

40 ~ 480

Pulse range

32 ~ 480

0 ~ 480

Pulse range

35 ~ 480

Dry / Cooling

Heating

Main EEV

Operation mode

Dry / Cooling

Heating

Branch box

Operation mode

Main EEV

Bypass EEV

Subcool EEV

(Table 13 : Pulse range of branch box EEV)

There is a case that EEV is full close at 32 10 pulse.

If 12 hours has passed from the last initialization, the compressor is compulsorily stopped.

3 minutes has passed from the protection stop of outdoor unit.

< Initialization conditions >

1. Pulse range

2. Initialization

During heating operation, lower limit is 0 pulse.

Outdoor unit

1-10. TEST OPERATION CONTROL

Under the condition where the air conditioner stops, press the MODE button and the FAN button

simultaneously for 2 seconds or more, and the test operation control mode will appear.

During test running, " " will display on the remote controller display.

Set the test operation mode, and the compressor will continue to run regardless of whatever

the room temperature sensor detects.

With Wired Remote Controller

Under the condition where the air conditioner runs, press the TEST RUN button, and

the test operation control mode will appear.

During test running, the Operation LED and Timer LED of the air conditioner body blinks simultaneously.

Set the test operation mode, and the compressor will continue to run regardless of whether the room

temperature sensor detects.

With Wireless Remote Controller

With Outdoor Unit

All the indoor units connected to the outdoor unit can be test-operated by push button as next page.

< Pre-test run check items >

Before the test run, refer to the figure and check the following items.

1. Is check run performed? Test run doesn't operate if check run is not performed.

After checking that the above items are all in order, refer to Test run method "to test run the unit.

If there are problems, adjust immediately and recheck.

< Test run method >

Depending on the communication status between the indoor and outdoor units, it may take several minutes for •

the system to start operating after settings for the test run are complete.

After the test run settings are complete, all the outdoor units and the connected indoor units will start operating. •

Room temperature control will not activate during test run (continuous operation).

Test run set with the outdoor unit doesn't stop automatically. Be sure to stop the operation according to the •

operation method.

All indoor units will operate when test run is performed from the outdoor unit. At this time, the remote controller of •

the indoor unit is unavailable.

Operation mode cannot be changed during the test run. To change the operation mode, please stop the test run •

first, and then perform the test run again. At this time, the compressor cannot be restarted for three minutes after

it stops in order to protect the indoor unit. Please restarte it after three minutes.

Be sure to configure test run settings only when the outdoor unit has stopped operating.

01-25

Perform test run for refrigerant system.

You can set “cooling test run” or “heating test run” with the push-button switch on the outdoor unit print circuit board.

Test run setting method

Function settings

(When [F4] to [F9] are displayed, continue to press

the SELECT button until [F3] is displayed.)

For cooling operation, press the

SELECT button until

“

”

is displayed.

For heating operation, press the

SELECT button until

“

”

is displayed.

Press the ENTER button for

more than 3 seconds.

Press the ENTER button for

more than 3 seconds.

Press the ENTER button for

more than 3 seconds.

Settings for stopping

test run operation

Settings for starting

test run operation

Press the ENTER button for

more than 3 seconds.

This will be displayed

after 5 seconds.

This will be displayed

after 5 seconds.

MODE/EXIT

This will be displayed

after 5 seconds.

This will be displayed

after 5 seconds.

This will be displayed when the

cooling test run starts.

This will be displayed when the

cooling operation mode is canceled.

This will be displayed when the heating

operation mode is canceled.

This will be displayed when the

heating test run starts.

: Press the “MODE/EXIT” button.

: Press the “SELECT” button.

: Press the “ENTER” button.

First 2 digits

Last 2 digits

(Blinking)

MODE/EXIT

SELECT

ENTER

EXIT

After the test run is complete, turn off the power. Attach the cover of the electrical component box and the front panel

of the outdoor unit.

(It takes approximately 30 seconds for

the outdoor unit to start its operation.)

(It takes approximately 30 seconds for

the outdoor unit to start its operation.)

(It takes approximately 30 seconds for

the outdoor unit to stop its operation.)

(It takes approximately 30 seconds for

the outdoor unit to stop its operation.)

01-26

At the time when the air conditioner is switched from the Cooling mode to Heating mode,

the compressor is stopped, and the 4-way valve is switched in 3 minutes later

after the compressor stopped.

When the power was interrupted by a power failure, etc. during operation, the operation contents

at that time are memorized and when power is recovered, operation is automatically resumed with

the memorized operation contents.

(Table 14 : Operation contents memorized when the power is interrupted)

Operation mode

Set temperature

Set air flow

Thermistor detected position

1-11. 4-WAY VALVE EXTENSION SELECT

1-12. AUTO RESTART

01-27

1-13. MANUAL AUTO OPERATION

If MANUAL / AUTO Button is pushed continuous from 3 seconds to 10 seconds,

manual auto operation will starts.

If the remote control is lost or battery power dissipated, this function will work without the remote

control.

OPERATION MODE

Auto changeover

Auto

Continuous

(No timer setting available)

75.2°F(24°C)

(Table 15 : Manual auto operation control)

SETTING TEMP.

FAN MODE

TIMER MODE

Timer mode

Wireless remote controller

Wired remote controller

(When Memory Backup : Disable)

Wired remote controller

(When Memory Backup : Enable)

OFF TimerON Timer

WEEKLY Timer

Temperature

: Memorize

: Not memorize

*It is necessary to set on the DIP-SW1-No,6 of the wired remote controller, to enable the memory backup.

Refer to the installation manual of wired remote controller for details.

SWING OPERATION

ECONOMY

OFF

VERTICAL LOUVER

NORMAL

HORIZONTAL LOUVER

All models

Functions

SET BACK Timer

01-28

1-14. FORCED COOLING OPERATION

Forced cooling operation is started when pressing MANUAL AUTO button for 10 seconds or more.

During the forced cooling operation, it operates regardless of room temperature sensor.

Operation LED and timer LED blink during the forced cooling operation. They blink for 1 second ON

and 1 second OFF on both operation LED and timer LED (same as test operation).

Forced cooling operation is released after 60 minutes of starting operation.

FORCED COOLING OPERATION will start as shown in Table 16.

OPERATION MODE

FAN CONT. MODE

TIMER MODE

SETTING TEMP.

SETTING LOUVER

SWING

( Table 16 : Detail of forced cooling operation)

Forced cooling operation

Cooling

Horizontal

OFF

Room temperature is not controlled

1-15. COMPRESSOR PREHEATING

1-16. MINIMUM HEAT OPERATION

MINIMUM HEAT OPERATION functions by pressing MIN HEAT button on the remote controller.

It is almost the same operation as below settings.

Operation mode

Setting temperature

Defrost operation

Oil recovery operation

Fan mode

Louver setting

Swing setting

LED indication

ON / OFF timer

( Table 18 : Detail of MINIMUM HEAT OPERATION )

Heating

50°F (10°C)

Normal operation

Only ECONOMY LED (Green)

Start condition

Release condition

Outdoor temperature 89.6

°F (32°C)

and

30 minutes after the compressor stop

Judgment condition Operation

Crankcase heater : ON

Crankcase heater : OFF

Outdoor temperature 93.2

°F (34°C)

Operating instruction to outdoor unit

The compressor temperature is maintained more than ambient temperature (other refrigerant cycle parts)

for the following reasons.

1.To Prevent the compressor damage by the cold start.

2.Speed up the ascent rate of the refrigerant, and the separation of the refrigerant and oil is furthered.

( Table 17 : Detail of compressor preheating operation )

Integrating defrost

If any defrost operated, "compressor integrating operation time" and "compressor OFF count" are cleared.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions becomes as shown in Table 22.

( Table 22 : Condition of defrost release )

Release Condition

Outdoor heat exchanger temperature is higher than 53.6°F(12°C)

Compressor operation time has passed 15 minutes.

1-17. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts as shown in the following Table 19, 20 and 21.

Less than

210 minutes

Over 240 minutes

Does not operate

Compressor integrating operation time

( Table 19 : Condition of normal defrost operation)

Normal defrost

Compressor integrating operation time

Less than

35 minutes

Over 35 minutes

Does not operate

26.6°F (-3°C)

( Table 21 : Condition of Integrating (OFF count) defrost operation)

( Table 20 : Condition of integrating defrost operation)

01-29

Outdoor temperature 14°F (-10°C)

and

Heat exchanger temperature 23°F (-17°C )

Outdoor temperature 14°F (-10°C)

and

Heat exchanger temperature -14°F (7°C )

Outdoor temperature 14°F (-10°C)

and

Heat exchanger temperature -4°F (-20°C )

Over 210 minutes

Compressor stopand

Outdoor temperature 35.6°F (2°C)

Outdoor unit

heat exchanger

temperature

Integrating defrost

(OFF count defrost)

Less than 10 minutes

Compressor continuous operation time

Outdoor temperature 35.6°F (2°C)

and

Compressor OFF count : 40 times

01-30

3. Defrost Flow Chart

The defrosting shall proceed by the integrating operation time, outdoor temperature

and outdoor heat exchanger temperature as follows.

Outdoor unit operation mode : Heating mode

Outdoor heat exchanger temperature (Outlet): Over 53.6° F(12°C)

Compressor ON time: Maximum 15 minutes

Defrost end

Outdoor

temperature [Ta]

Ta < 14°F(-10°C)

Compressor : 70rps

Outdoor fan motor : OFF ( Fan defrost : ON)

Main EEV : 480Pulse4-way valve : OFF

Solenoid valve : OFF

Indoor fan : OFF

Compressor

integrating

operation time

Over 240 minutes

Integrating defrost

start

Defrost Indicator:

[Operation lamp]

7 sec ON / 2 sec OFF

Outdoor

heat exchanger

temperature [Tn]

Below 26.6°F(- 3°C)

Outdoor

temperature [Ta]

Ta < 35.6°F(2°C)

Compressor integrating

operation time :Over 35 minutes

Outdoor

temperature [Ta]

Ta > 14°F(-10°C)

Outdoor

heat exchanger

temperature [Tn]

Tn < 1.4°F(-17°C)

Outdoor

heat exchanger

temperature [Tn]

Tn < Ta - 14°F(7°C)

Outdoor

heat exchanger

temperature [Tn]

Tn < -4°F(-20°C)

Compressor

OFF count

40 times

Compressor continuous

operation time

Less than 10 minutes

Compressor

integrating

operation time

Over 210 minutes

Compressor

stop

Outdoor

temperature [Ta]

Ta < 35.6°F(2°C)

Compressor continuous

operation time

Over 10 minutes

Normal defrost

start

1-18. OFF DEFROST OPERATION CONTROL

1. OFF DEFROST OPERATION CONDITION

When operation stops in the [Heating operation] mode, if frost is adhered to the outdoor unit heat

exchanger, the defrost operation will proceed automatically. In this time,

the outdoor unit will allow the heat exchanger to defrost, and then stop.

When heating operation stops, all of following conditions are met, OFF defrost operation starts.

OFF Defrost Flow Chart

Heating operation stop

Compressor integrating operation : Over 30 minutes

and

Compressor countinuous operation time : Over 10 minutes

and

Outdoor heat exchanger temperature : Below

24.8°F(-4°C)

Defrost start

Outdoor heat exchanger temperature : Over 53.6°F(12°C)

Compressor ON time : Maximum 15 minutes

Defrost end

2. OFF DEFROST RELEASE CONDITION

01-31

Release Condition

Outdoor heat exchanger temperature is higher than 53.6°F(12°C)

Compressor operation time has passed 15 minutes.

( Table 23 : OFF Defrost Release Condition )

OFF defrost operation is released when the conditions becomes as shown in Table 23

1. Compressor operation integrating time lasts for more than 30 minutes.

2. Compressor countinuous operation time lasts for more than 10 minutes.

3. Outdoor unit heat exchenger temperature is less than 24.8°F(-4°C).

If the operation stops in defrost operation, defrost operation is kept untill the it is completed.

1-19. FAN DEFROST OPERATION CONTROL

01-32

The Fan-defrost operation is controled as follows in order to prevent the freezing of FAN.

Each start condition of defrosting and when the outdoor temperature is below 41°F(5°C) and more than

14°F(-10°C).

< Operation >

< Release condition >

< Start condition >

- Compressor : OFF >> After 35sec. >> Compressor : ON (70rps)

After 150sec. elapsed and Tn 53.6°F(12°C)

- Outdoor unit FAN: OFF >>

High pressure 507.5psi(3.5Mpa) >> Outdoor unit FAN: ON (250rpm)

15 minutes elapsed.

- Main EEV >> 480 Pls

- 4 Way valve >> OFF

- Outdoor unit FAN : ON >>

>> Outdoor unit FAN: ON

Tn: Heat exchanger outlet pipe temperature

- Compressor : ON (70rps) >>

>> Compressor : OFF

(After 35sec. Compressor: ON)

90 sec. elapsed after Outdoor

unit fan operation starts.

High pressure -

satutarion temp. 32°F(0°C)

Tn 32°F(0°C)

(690rps: Initial fans speed of heating)

- Main EEV : 480 Pls >>

>> Main EEV :

Initial vaue of heating

(After 35sec. elapsed)

- 4 Way valve : OFF >>

>> 4 Way valve : ON

(After 35sec. elapsed)

1-20. OIL RECOVERY OPERATION

During the oil recovery operation, appears on the display of wired and central remote controller,

and appears on the simple remote controller.

The operation indicators (LED) of the indoor units flash slowly.

01-33

Outdoor unit operates by cooling refrigerant cycle for recover the refrigerant oil to the compressor

It operates forcibly from the compressor integrating time in Cooling and Dry mode.

Condition of the oil recovery operates after 1 hour

1. Cooling oil recovery operation

< Operation >

Compressor : Over 50rpsOutdoor fan : Normal operation

4 way valve : OFF

< Release condition >

*2~7 minutes has passed from the start of oil recovery operation.

2. Heating oil recovery operation

< Start condition >

It operates forcibly when the compressor integrating operation time becomes 12 hours.

< Operation >

Compressor : Fixed 50rpsOutdoor fan : Step2 (290rpm)

4 way valve : OFF

Refrigerant cycle is changed to the cooling cycle temporarily.

< Release condition >

*1~5 minutes has passed from the start of oil recovery operation.

(1). First time after power ON

(2). When the operation mode changes from Heating to Cooling. (only first time)

< Start condition >

Condition of the oil recovery operates after 3 hour

Without condition

*Operation time changes from the progress status of oil recovery.

01-34

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation

as shown in Fig. 24.

The External Electrical Heater is operated as below.

1-21. FRESH AIR CONTROL( For AU / AR type)

1-22. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)

(Fig. 24 : Fresh Air control)

(Fig. 25 : External electrical heater control)

Operation

Stop

Operation

Stop

Fan motor

(Indoor unit)

Fan motor

(for Fresh Air)

When the room

temperature rises

When the room

temperature drops

Ts : Setting temperature

Heater : OFF

Heater : ON

Heater : OFF

Ts -20°F(-10°C)

Ts -2°F(-1°C)

Ts -6°F(-3°C)

Ts -24°F(-12°C)

When all of the following conditions are met, external elecrtical heater will operate according to Fig. 25.

1). When one of the ON conditions is not met.

2). When Defrost operation or Oil recovery operation starts

< Heater : ON condition >

< Heater : OFF condition >

System type

Operation mode

Compressor

Indoor fan

Heatpump

Heating

ON (S-Lo is excluded)

*It needs the external relay and power supply.

1-23. POWERFUL OPERATION (For ASU*RLS2/ ASU*RLF1/ AGU*RLF type)

The POWERFUL OPERATION functions by pressing POWERFUL button on the remote controller.

The indoor unit & outdoor unit will operate at maximum power as shown in Table 14.

Release Condition is as follows.

[Cooling / Dry]

- Room tenperature < Setting temperature -3.0°F(- 1.5°C) or Operation time has passed 20 minutes.

COMPRESSOR FREQUENCY Maximum

FAN CONT. MODE Powerful

SETTING LOUVER Cooling/ Dry : 3, Heating : 5

(Table 14 : POWERFUL operation)

Powerful operation

[Heating]

- Room tenperature > Setting temperature +3.0°F(+1.5°C) or Operation time has passed 20 minutes.

01-35

1-24. DRAIN PUMP OPERATION

1. When the compressor starts, the drain pump starts simultaneously.

2. The drain pump operates continuously for 3 minutes after the compressor is turned off.

3. When the compressor stops by the "Anti- freezing protection", the drain pump is turned off

in 1 hour after the compressor stops.

4. When the water level in the drain pan rises up and then the float switch functions:

The compressor, indoor and outdoor fan motor operation are stopped.

Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained)

5. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.

(It is necessary to turn off power for release it. )

6. When the float switch turns OFF less than 3 minutes, the unit starts Cooling operation.

1.When the water level in the drain pan rises up and then the float switch functions:

Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained)

2. When the float switch turns ON continuously for 3 minutes, "FAILURE INDICATION" operates.

Thereafter, even if the float switch turns OFF, the "FAILURE INDICATION" is not released.

(It is necessary to turn off power for release it. )

During Cooling / Dry mode

3 minutes

OFF

Compressor

Drain Pump

3 minutes

3 minutes ST

OFF

Float Switch

Compressor

Indoor Fan

Drain Pump

3 minutes

OFF

Float Switch

Drain Pump

During HEATING / FAN mode / Stop operation

Less than 3 minutes

The indoor unit fan motor operates after the float switch is turned off.

( Fig. 26 : Detail of Drain Pump Operation in Cooling / Dry )

( Fig. 27 : Detail of Drain Pump Operation in Heating )

01-36

1-25. ECONOMY OPERATION

ECONOMY OPERATION functions by pressing ECONOMY button on the remote controller or

Home controller, it is almost the same operation as below settings.

Cooling

Heating

Dry

Auto

Normal operation

Ts + 2°F (Ts+1°C)

Ts - 2°F (Ts-1°C)

Ts + 2°F (Ts+1°C)

Cooling : Ts + 2°F (Ts+1°C)

Heating : Ts -2°F (Ts-1°C)

Operation

mode

Outdoor

unitlimit

currentvalue

Setting temperature

correction

Indoor fan speed

< Release conditions of ECONOMY OPERATION >

1, When the ECONOMY button on the remote controller is pressed.

2, When the indoor unit start-up by MANUAL AUTO button on the indoor unit.

(When the operation is stopped by MANUAL AUTO button, it is not released.)

Ts : Setting temperature

( Table 24 : Detail of ECONOMY OPERATION)

During ECONOMY OPERATION, *limit current value of outdoor unit is changed to 17.0A

When also "ENERGY SAVING PEAK CUT FUNCTION" mode is effective, the outdoor unit will operate

by lower current.

ECONOMY OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation

Minimum heat operation

*17.0A

Indoor unit LED

OPERATION : Lighting

ECONOMY : Lighting

Wired remote

controller display

ECO

: Lighting

(When only fan mode,

air flow downs 1 step)

1-27. LOW NOISE MODE

1-26. ENERGY SAVING PEAK CUT FUNCTION

01-37

( Table 25 : Outline of ENERGY SAVING PEAK CUT FUNCTION )

MODE1

(Forced thermostat-OFF)

MODE2

50%

MODE3

75%

MODE41

00%(Rated)

*The performance drops when operating in the LOW NOISE OPERATION.

The current value is limited to reduce the power consumption by external input terminal 3(CN933).

When

this function, "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION"

and "LOW NOISE OPERATION" are effective, the

outdoor unit will operate by lowest current of them.

*Percentage is rated electrical power ratio

The outdoor unit operation changes from the capacity priority to the low noise priority

by external input 1(CN931).

The compressor speed and outdoor fan speed are limited as following table.

When "CURRENT OVERLOAD OPERATION", "ECONOMY OPERATION" and "PEAK CUT OPERATION"

are effective, the outdoor unit will operate by lowest current of them.

( Table 26 : Detail of LOW NOISE OPERATION )

Cooling mode

Heating mode

11.0A 17.0A

22.5A

Compressor stop

ENERGY SAVING PEAK CUT OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation

Check run

LOW NOISE OPERATION does not operate in following conditions.

Compressor start-up process

Defrost operation

Oil recovery operation Check run

Cooling mode

Dry mode

Heating mode

Limit compressor speed

Limit fan speed

MODE1 MODE2 MODE3

52rps 36rps

690rpm 390rpm

55rps 42rps

690rpm

45rps

580rpm

49rps

580rpm 390rpm

(Relative to the rated sound pressure level)

Dry mode

01-38

1-28. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL

During the compressor in operation,

the discharge thermistior will detect discharge gas temperature.

The discharge gas temperature is controlled in the following protections.

239°F

(115°C)

221°F

(105°C)

Comp. stop

Comp. speed -20rps every 120 sec.

Discharge

temperature

(Fig. 28 : Discharge temperature control)

Discharge temperature protection 2

Discharge temperature becomes more than 239°F(115°C).

The compressor is stopped, and it does not restart for 7 minutes.

When the discharge temperature becomes lower than 158°F(70°C), the compressor restarts.

If the

Discharge temperature protection 2 operates 2 times within 24 hours,

discharge temperature error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

Discharge temperature protection 1

Discharge temperature becomes more than 221°F(105°C).

The compressor speed -20rps every 120 seconds.

If the compressor operates at minimum speed for 120 seconds,

and the release condition isn't met, it will be stopped.

When the discharge temperature becomes lower than

212°F(100°C), the compressor returns to the normal operation.

If the compressor was stopped by protection, it will restart

after 3 minutes ST.

158°F

(70°C)

Release protection 2

Hold

2. COMPRESSOR TEMPERATURE PROTECTION CONTROL

<Start condition>When the compressor temperature thermistor detects more than 233.6°F (112°C).

<Operation> The compressor is stopped at once.

The compressor temperature becomes lower than 176°F(80°C) after 3 minutes ST.

If the Compressor temperature protection operates 2 times within 24 hours,

discharge temperature error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

01-39

3. HEAT SINK TEMPERATURE PROTECTION CONTROL

During the compressor in operation,

heat sink temperature thermistor (Built-in IPM) will detect heatsink temperature.

It is controlled in the following protections.

Heat sink protection 1 and 2 operates at the same time, if each conditions are met.

When the heat sink temperature becomes more than 185°F(85°C).

Outdoor unit fan +1 STEP (rise) every 30 seconds.

When the h

eat sink temperature becomes lower than 176°F(80°C).

and the outdoor fan returns to the normal operation.

Heatsink temperature protection 1

Heatsink temperature protection 2

When the heat sink temperature becomes more than 194°F(90°C).

Compressor speed -10rps every 30 seconds

.If the compressor operates at minimum speed for 120 seconds,

and the release condition isn't met, it will be stopped.

When the h

eat sink temperature becomes lower than 185°F(85°C), the outdoor fan to the normal operation.

If the compressor was stopped by protection, it will restart after 3 minutes ST.

Heatsink temperature protection 3

When the heat sink temperature becomes more than 212°F(100°C).

Compressor is stopped

When the h

eat sink temperature becomes lower than 185°F(85°C) and after 3 minutes ST,

the compressor restarts.

212°F

(100°C)

194°F

(90°C)

185°F

(85°C)

Outdoor unit fan +1 step every 30 sec.

Comp. stop

Comp. speed -10rps every 120 sec.

Heat sink

temperature

(Fig. 29 : Heat sink temperature control)

176°F

(80°C)

Release protection 1

Release protection 2,3

4. CURRENT RELEASE CONTROL

The compressor speed is controlled so that the outdoor unit input current does not exceeds

the current limit value is decided by the outdoor temperature.

When "ECONOMY OPERATION" or "PEAK CUT OPERATION" are effective,

the outdoor unit will operate by lowest current.

( Table 27 : Current release operation value / Release value )

Cooling

Dry

Heating

Outdoor temperature [ Ta ]

Normal

Low noise

mode 1

Low noise

mode 2

Low noise

mode 3

Current value [ A ] (Conrtol / Release)

122°F(50°C) < Ta

116.6°F(47°C) < Ta < 122°F(50°C)

104°F(40°C) < Ta < 116.6°F(47°C)

104°F(35°C) < Ta < 104°F(40°C)

86°F(30°C) < Ta < 104°F(35°C)

20°F(30°C) < Ta < 86°F(30°C)

50°F(10°C) < Ta < 20°F(30°C)

23°F(-5°C) < Ta < 50°F(10°C)

Ta < 23°F(-5°C)

75.2°F(24°C) < Ta

62.6°F(17°C) < Ta < 75.2°F(24°C)

53.6°F(12°C) < Ta < 62.6°F(17°C)

41°F(5°C) < Ta < 53.6°F(12°C)

30.2°F(-1°C) < Ta < 41°F(5°C)

5°F(-15°C) < Ta < 30.2°F(-1°C)

Ta < 5°F(-15°C)

17.0 / 16.5

18.0 / 17.5

22.0 / 21.5

26.0 / 25.5

22.0 / 21.5

*20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

14.0 / 13.5

16.5 / 16.0

17.0 / 16.5

22.0 / 21.5

*20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

13.0 / 12.5

15.0 / 14.5

15.5 / 15.0

17.0 / 16.5

19.0 / 18.5

*20.5 / 20.0

19.0 / 18.5

26.0 / 25.5

10.5 / 10.0

12.5 / 12.0

13.0 / 12.5

14.0 / 13.5

16.0 / 15.5

*20.5 / 20.0

19.0 / 18.5

23.5 / 23.0

*Current value(Control / Release) is different from the operating fan step of the outdoor unit.

(Above case is more than 4 STEP, refer to outdoor unit fan table.)

Cooling

Dry

STEP 0, 1 : 11.0 / 10.5

STEP 3 : 16.5 / 16.0

STEP 2 : 13.5 / 13.0

50°F(10°C) < Ta < 20°F(30°C)

23°F(-5°C) < Ta < 50°F(10°C)

< Ta < 23°F(-5°C)

When the outdoor unit input current reaches to the control value, the compressor speed

-1rps every 1 second till the release value.

Then, if the compressor operates at minimum speed and the input current doesn't reach

to the release value, the compressor is stopped.

Ta : Outdoor temperature

01-40

HIGH PRESSURE PROTECTION 1

During the compressor in operation,

When the discharge high pressure sensor will detect the high pressure sensor.

The high pressure is controlled in the following protections.

When the compressor speed meets following conditions.

01-41

5 . HIGH PRESSURE PROTECTION CONTROL

Cooling

Dry

HP > 478PSI

HP > 580PSI

rps < 20

20 < rps < 30

30 < rps

Compressor speed [rps]

Control

Release

HP < 451PSI

HP > 543PSI HP < 530PSI

HP < 551PSI

High pressure

Heating

HP > 478PSI

rps < 20

20 < rps < 90

90 < rps

Compressor speed [rps]

Control

Release

HP < 451PSI

HP > 507PSI HP < 530PSI

HP < 451PSI

High pressure

When the compressor speed meets following conditions.

The compressor speed -5rps every 60 seconds.

If the compressor operates at minimum speed for 60 seconds and the release condition isn't met,

it will be stopped.

The compressor speed -5rps every 60 seconds.

If the compressor operates at minimum speed for 60 seconds.

If the compressor was stopped by protection, it will restart after 3 minutes ST

and high pressure is lower than 435PSI.

( Table 29 : Heating high pressure protection control)

( Table 28 : Cooling / Dry high pressure protection control)

During Cooling / Dry mode

During Heating mode

594PSI

435PSI

Release of protection

Hold

Compressor stop

High

pressure

( Fig. 30 : High pressure protection 2 )

High pressure sensor detects more than 594PSI.

HIGH PRESSURE PROTECTION 2

HIGH PRESSURE PROTECTION 3

When the high pressure sensor detects lower than 435PSI

and after 3 minutes ST, the compressor restarts.

When the pressure switch becomes OFF (Open : more than 609.2 PSI), the compressor is stopped.

<Operation>Compressor is stopped.

When the pressure switch becomes ON (Close : lower than 464.1 PSI) and after 3 minutes ST,

the compressor restarts.

6. LOW PRESSURE PROTECTION CONTROL

7.25PSI

Release protection 1

Compressor stop

Low

pressure

(When continues for 5 minutes)

( Fig. 31 : Low pressure protection 1 )

After the compressor operates for 1 minute, and low pressure sensor

detects lower than 7.25PSI for 5 minutes.

Compressor is stopped.

Compressor restarts after 3 minutes ST.

The compressor operates for 10 minutes, and low pressure sensor

detects lower than 23.2PSI for 1 minute.

The compressor speed -5rps every 60 seconds till the

release condition.

If the compressor operates at minimum speed for 60 seconds,

and the release condition isn't met, the compressor is stopped.

Low pressure sensor detects more than 26.0PSI,

and after 3 minutes ST.

26.0PSI

23.2PSI

Release protection 2

Compressor stop

Low

pressure

(When continues for 1 minutes)

( Fig. 32 : Low pressure protection 2 )

LOW PRESSURE PROTECTION 2 (For Heating mode)

LOW PRESSURE PROTECTION 1 (For Cooling, Dry and Heating mode)

Compressor speed -5 every 60 sec.

If the Low pressure protection 1 operates 5 times within 2 hours,

Low pressure error will occur. <Permanent stop>

An error code is displayed each controller, it is reset by only the main power supply reset.

Compressor is stopped.

01-42

24.6PSI

21.7PSI

Release protection 3

Main EEV of Branch Box opens

Low

pressure

(Fig. 33 : Low pressure protection 3)

During the compressor in operation, low pressure sensor detects

lower than 21.7PSI.

Main EEV of Branch Box opens untill the release condition.

Low pressure sensor detects more than 24.6PSI.

If the compressor stopped, it restarts after 3 minutes ST.

Hold

LOW PRESSURE PROTECTION 3 (For Cooling / Dry mode)

8. EEV FULL CLOSE PROTECTION CONTROL (Heating mode)

7. ANTIFREEZING CONTROL (Cooling and Dry mode)

When all the following conditions are met for the 2 times in a row.

1. During compressor in operation

2. After 20 minutes from compressor start-up.

3. Indoor unit heat exchanger temperature - Room temperature < 8°F( 4°C)

Outdoor unit is stopped and EEV is initialized.

After 3 minutes ST, compressor will restart.

When the indoor heat exchanger temperature sensor detects lower than 37.4

°F(3°C).

Main EEV of branch box is closed.

When indoor heat exchanger becomes more than 44.6

°F(7°C).

To prevent the indoor unit heat exchenger freezing.

Operation condition of EEV is checked from the temperature difference

indoor heat exchanger and room temperature.

01-43

Hybrid Flex Inverter System

2. TROUBLE SHOOTING

02-01

2-1 Service maintenance for Hybrid Flex Inverter System

2-1-1 Features

2-1-1 Error code

Enhanced installability and maintenance.

1) New error codes are adopted.

1) Multi-room --> Many pipes and lines

2) Branch box --> Pipes and line

3) Increased power supply points --> Outdoor units and branch boxes

- The conditions of each lines are automatically checked.

- Controller in outdoor units.

- 7-segment lamp in outdoor units.

Check operation

- Lines and pipes of branch boxes are automatically checked.

- Check result (Fault and right lines) is shown.

Controller in outdoor units

[Available]

- Cooling and heating test running

- Refrigerant recovery mode

- Local setteing function (Outdoor unit function)

Display in outdoor units

[Available]

- Cooling and heating running condition

- Detail and unit number of error

- Speed of compressor and outdoor fan

- Value detected from sensor

Lamp flashing, wired remote control, outdoor unit 7-segment (number).

Checked by alphabet.

Current "EE" --> New "Er"

Shown in wired remote control, temperature setting.

2. TROUBLESHOOTING

02-02

2) Hybrid Flex Inverter System, error codes

Error code display Defective component Appearance Object person

Indoor unit

Wired remote

control

Outdoor unit

Branch box

Indoor units lamps,

flashing of operation

and timer lamps.

and continuous

flashing of economy

lamp.

LCD, 7-segment

display

Four 7-segment lamps

on PCB

Four lamps on PCB

- Indoor unit error

- Abnormal units

except indoor units

- Outdoor unit error

- Abnormal units

except outdoor units

(Indoor

unit, Branch-

box)

- Branch box error,

*No exception

- End user

- Installer

- Service

engineer

- Service

engineer

- Installer

OPERATION (Green)

TIMER (Orange)

ECONOMY (Green)

LED981

POWER

/ MODE

LED982

ERROR

LED961 LED962

MODE /

EXIT

SW931

SELECT

SW932

ENTER

SW933

CHECK

SW934

LED401

LED402

LED403

LED404

LED405

2-1-3 Response procedure at error code display

Case1 : End user

Occurrence of an error

Indoor unit lamp is flashing.

Inform object person of

the number of flashing.

Case2 : Service Engineer

Site visit

Check outdoor ‚7-seg

to find defectives

Indoor unit error

(7-seg : E5U1)

Branch box error

(7-seg : EJ2U)

Outdoor unit error

Amount of errors

Check indoor unit,

Branch Box

Check indoor unit,

Branch Box

( : On, : Blinking, : Off)

02-03

Case3 : Error at construction

After performing the below-described work, repairs, inspections etc., always carry out the Check operation. Normal

operation will not be possible without performing the Check operation.

1. Things to comfirm before starting the Check operation

2. Restrictions applicable when performing the Check operation

To ensure safety, check that the following work, inspections and operations have been completed.

3. Operating procedure for Check run

CHECK

7 seg.display

POWER

MODE

(LED981)

ERROR

(LED982)

[Example of 7 seg. display]

Number of

branch boxes

Number of

indoor units

(currently

operating)

(operation has finished

normally (without error))

(1)

(2)

Turn power on to the outdoor unit, indoor units and branch boxes.

After the displayed number of “8888.” has been turned off, press

the “CHECK” button.(approximately 2 minutes)

Press and hold the "CHECK" BUTTO for

more than 3 seconds.

(3)

The number of connected branch boxes and indoor units will be

displayed on the 7 seg. display. Check that the displayed number

matches the actual number of connected units. Do not perform the

Check run if the displayed number of units is in error. If the Check run

was performed with the number of units in error, check the state of the

units and then perform the Check run again.

If the displayed number of units matches the installed number,

go to (4)

If the displayed number does not match the installed number,

check the following.

Are all the Branch boxes tume

d on?

Check that the

Branch boxes are turned on, and go to (4).

Are connection cables connected to all of the indoor units? 

Turn of the power, connect the

Connection cable and go to (1).

(4)

The Check run will start. 

In the Check run, the following items will be checked.

The wiring and piping between the indoor units and the Branch box

Valve opening

To make an enforced stop, press the "MOD

E/EXIT" button.

You cannot execute the stop operation using the remote control.



To prevent electric shock, close the service panel during the

Check run.



(5) The Check run will stop automatically after allitems are completed.

When an error occurs, consult the following error display items.

Correct the error, and carry out the Check run again.

When the error display disappear even the measures fo

r error

are taken, switch on the power again after turning off the

power. When the power is turned on again after turned off,

wait approx. 10 minutes and turn on the power again.

MODE/EXIT

(Press the MODE/EXIT button.

“END” has been turned off.)

(Press and hold for more

than 3 seconds.)

(Press and hold for more

than 3 seconds.)

Press and hold the "CHECK" button again for more than 3 seconds.

When the Check run starts, all indoor units connected to the outdoor unit will start to run automatically. During 

the Check run, you cannot check the operation of the indoor units separately. After the Check run, check the

operation of the indoor units separately in normal operation.

The operable temperature ranges for the Check run are: external temperature -15 to 46ºC(5 to 115°F); room 

temperature for cooling 18 to 46ºC(64 to 114°F); room temperature for heating -15 to 37ºC(5 to 98°F).

In the check run, the conditioner will automatically switch between cooling and heating depending on the 

external temperature and internal temperature.

If the external temperature or internal temperature is outside the above operable temperature range, wait until

the temperature is within the operable range and then perform the Check run.

The Check run can be completed within 1 hour, but may take several hours depending on the external and 

internal temperature conditions etc.

Please do not conduct the Check run with all the windows in the room closed. Otherwise the room temperature 

could get too low or too high.

Depending on the difference of the room temperature of each room, a judgment may be impossible. 

{

}

1 Check that all work on the piping connecting the outdoor unit , indoor units and branch box

has been completed

2 Check that all work on the wiring connecting the outdoor unit, indoor units and branch box

has been completed

3 Is there a gas leakge? (At pipe connections flang connections and brazed areas )

4 Is the system changed with the specifed volume of refrigera

nt?

5 Is a breaker installed at the power supply cable of outdoor unit and every branch boxes?

6 Are the wires connected to the terminals without looseness, and in accorodance with the specifications?

7 Is the 3-way valve of the outdoor unit open?(Gas pipe and liquid pipe)

8 Is power supplied to the crank case heater for more than 12 hours?

9 Has the power supply of the all indoor units turned of

f?(Remote controller)

02-04

Error display Error item Contents

7 seg. display LED lamp

(blinking)

Indeterminable The external or room temperature is outside the oper-

ablerange. The air conditioner will temporarily permit

normal operation, but the Check run should be carried

out again at a later date when the temperatures are

within the operable ranges.

Wiring number

error

The number of wirings between indoor unit and branch

box is not correct. Turn off all the units, and check

number of connected wires. After correcting the error,

turn on the power and carry out the Check run again.

Pipe number

error

The number of wirings between indoor unit and branch

box is not correct. Turn off all the units, and check

number of connected wires. After correcting the error,

turn on the power and carry out the Check run again.

If the number of pipes is correct, the internal heat-ex-

changer thermistor or branch box piping thermistor may

have come out of its holder, or a coil may have come

out

of an expansion valve. In this case, please contact

Service personnel.

(example)

Wiring error A wiring error has occurred.

The location at which the wiring error has been deter-

mined will be displayed 7 seg. display. If there are

multiple wiring error locations, the display will cycle

through the locations. switching every 2 seconds. After

performing the following operation, turn off the power

and correct the wiring.

Note down the content of the wiring error.

Note down the number of blinks of the green LED on

the PCB of the branch box.

(The number of blinks indicates the device number of

the Branch box)

After correcting the wiring, turn on the power and carry

out the Check run again.

(In the case of the diagram)

Connect the connection cable which is connected to the

terminal A of Branch box (Primary) to the terminal B on

Branch box (Secondary 2).

unit error

This is a unit error.

* For error content, please refer to "11.2. Error display

mode".

1: Branch box-

Primary

2: Branch box-Secondary 1

3: Branch box-Secondary 2

a: Branch box-TerminalA

b: Branch box-TerminalB

c: Branch box-TerminalC

4. Error display

( : On, : Blinking, : Off)

Operation LEDTest Operation

Operation LED

Power Failure

Oil Recovery

Operation LED

Defrosting

Timer LED

Operation LED

Timer LED

Continuous lightingTimer LEDTimer

Continuous lightingOperation LEDOperation

Flashing PatternIndication LampIndication type

02-05

Mode Mismatch

2-2 NORMAL OPERATION

2-2-1 Normal status for Indoor Unit Display

Filter Sign

Economy

LED

OFF

0.5 sec

7 sec 2 sec

OFF

Operation LED

Timer LED

Economy LED

Maintenance Mode

0.5 sec 0.5 sec

1 sec

OFF

1 sec 1 sec

OFF

1 sec

OFF

21 sec

0.8 sec

OFF

1 cycle

Compulsion Cooling

Low Noise Operation

Defrost Operation

Oil Recovery Operation

Heating Mode

Cooling Mode

Idling(stop)

Indication type 7 Segment LED Pattern

2-2-2 Normal status for Outdoor Unit Display

Blank

"C" OO "L"

"H" EA "T"

"O" IL "R" ECOVERY

"D" E "F" ROST

"P" eak "C" ut

"L" OW "N" OISE

Description

Power Saving Operation

02-06

During Low Noise Operation

During Power Saving Operation

During Defrost Operation

During Oil Recovery Operation

During Heating Mode

During Cooling Mode

2-2-3. Normal status for Branch Box Display

The branch box is functioning properly.

Comment

: Lit

: Unlit

Green Red

LED401 LED402 LED403 LED404 LED405

Manual Auto Switch Error

Indoor Room Thermistor Error

Indoor Unit Model Information Error

EEPROM Access Abnormal

Number of Indoor Units Error

Number of Branch boxes Error

Connected Combination Error

Check Run Unfinished

Indoor Unit Capacity Error

Number of Wires and Pipes Error

Wired Remote Controller

Communication Error

Error Contents

Continuous flash

4 times flash

Continuous

flash2 times flash

3 times flash

Continuous flash4 times flash

3 times flash

Continuous flash3 times flash

2 times flash

Continuous flash5 times flash

2 times flash

5 times flash

1 times flash

Continuous flash 2 times flash2 times flash

Continuous flash1 times flash2 times flash

Continuous flash2 times flash1 times flash

Continuous flash1 times flash1 times flash

Trouble

shooting

Economy LEDTimer LEDOperation LED

02-07

2-3 ABNORMAL OPERATION

2-3-1 Error status for Indoor Unit Display

1 times flash

Serial Communication Error

Drainage Error

Indoor Unit Fan Motor Error

Indoor Heat Ex. Thermistor Error

Continuous flash4 times flash 2 times flash

Continuous flash6 times flash

Continuous flash3 times flash

Continuous flash1 times flash

5 times flash

2 times flash

Continuous flash6 times flash 3 times flash

Continuous flash

7 times flash

Continuous flash10 times flash

7 times flash

6 times flash

1 times flash

2 times flash

Continuous flash7 times flash 3 times flash

Continuous flash7 times flash 4 times flash

Continuous flash7 times flash 5 times flash

Continuous flash7 times flash7 times flash

Outdoor Unit Model

Information Error

Inverter Error

Display P.C.B. Communication Error

Continuous flash4 times flash6 times flash

A. F. Voltage Error

Discharge Thermistor Error

Compressor Thermistor Error

Heat Ex. Liquid Outlet

Thermi

stor Error

Outdoor Thermistor Error

Suction Gas Thermistor Error

Heat Sink Thermistor Error

Please refer the flashing pattern as follows.

The OPERATION, TIMER, ECONOMY lamps operate as follows according to the error contents.

6,7

1, 37 ~ 39

Damper Error

Continuous flash7 times flash5 times flash

Intake Grille Error

Continuous flash8 times flash5 times flash

Error Contents

Trouble

shooting

Economy LEDTimer LEDOperation LED

Continuous flash

8 times flash

8 times flash 2 times flash

3 times flash

Continuous flash8 times flash 4 times flash

Sub-Cool Heat Ex.Gas

Inlet Thermistor Error

Liquid Pipe Thermistor Error

Current Sensor Error

Continuous flash8 times flash 6 times flash

Continuous flash

13 times flash

Continuous flash5 times flash

9 times flash

7 times flash

2 times flash

Compressor Control Error

Outdoor Unit Fan Motor Error

Branch Box Error

Continuous flash4 times flash9 times flash

Discharge Pressure Sensor Error

Suction Pressure Sensor Error

High Pressure Switch Error

Continuous flash9 times flash 9 times flash

Continuous flash

3 times flash

10 times flash

5 times flash

4 Way Valve Error

Compressor Temp. Error

Low Pressure Error

Continuous flash1 times flash10 times flash

Discharge Temp. Error

Error Indication Flashing Pattern

0.1s / 0.1s

4.0s

1.0s

0.5s 0.5s

0.5s 0.5s 0.5s 0.5s

1.0s

0.5s 0.5s

3.0s

1.0s

4.0s

1 cycle

OFF

Operation LED

Timer LED

Economy LED

Example : Indoor Unit Main PCB Error (Operation LED : 3 times, Timer LED : 2 times)

02-08

Sub-Cool Heat Ex.Gas

Outlet Thermistor Error

Over Current Error

23, 24

27, 28, 29

1, 40 ~ 45

2-3-2 Remote Controller Display

02-09

<< WIRED REMOTE CONTROLLER >>

If an error occurs, the following display will be shown.

(

“ “ will appear in the set room temperature display.)

“

“ is displayed, immediately contact authorized

service personnel.

Unit number (usually 0) Error code

Ex. Error code display

ERROR CODE DISPLAY

<< SIMPLE REMOTE CONTROLLER >>

Error code

Ex. Error code display

Faulty unit No.

(Remote controller address)

ERROR CODE DISPLAY

<< HOME CONTROLLER >>

If an error occurs, the following display will be shown.

(

“ “ will appear in the set room temperature display.)

“ “ is displayed, immediately contact authorized

service personnel.

ERROR DISPLAY

To show which indoor unit is the error displayed.

indoor unit's name and "ERROR" are alternately shown.

(0.5s indoor unit's name / 0.5s "ERROR")

Ex. Error display

Trouble

shooting

Error Contents

2-3-3 Error Code List for Simple and Wired Remote Controller

Error

Code

Trouble

shooting

Error Contents

Error

Code

1 2

1 5

2 1

2 2

2 3

2 4

3 2

3 5

4 1

4 2

5 1

5 3

Indoor Room Thermistor Error

Manual Auto Switch Error

Indoor Unit Model Information Error

EEPROM Access Abnormal

Number of Indoor Units Error

Number of Branch boxes Error

Serial Communication Error

Connected Combination Error

Indoor Unit Capacity Error

Number of Wires and Pipes Error

Check Run Unfinished

Wired Remote Controller

ommunication Error

Drainage Error

Indoor Unit Fan Motor Error

Indoor Heat Ex. Thermistor Error

6 2

6 3

7 1

7 2

7 3

Compressor Thermistor Error

Discharge Thermistor Error

Inverter Error

Outdoor Unit Model Information Error

Heat Ex. Liquid Outlet Thermistor Error

8 2

8 3

8 4

8 6

9 5

9 7

Current Sensor Error

Liquid Pipe Thermistor Error

Sub-Cool Heat Ex.Gas

Inlet Thermistor

Error

Discharge Pressure Sensor Error

Suction Pressure Sensor Error

High Pressure Switch Error

Outdoor Unit Fan Motor Error

Compressor Control Error

A 1

A 3

A 5

Low Pressure Error

Compressor Temp. Error

Discharge Temp. Error

7 4

7 5

7 7

Heat Sink Thermistor Error

Suction Gas Thermistor Error

Outdoor Thermistor Error

1 1

6 A

Display P.C.B. Communication Error

9 4

Over Current Error

9 9

4 Way Valve Error

J 2 Branch Box Error

Sub-Cool Heat Ex.Gas

Outlet Thermistor Error

1,37 ~ 39

6, 7

23, 24

27,28,29

1,40 ~ 45

5 7 Damper Error

5 8 Intake Grille Error

2-3-4 Outdoor Unit Display

POWER

LED981

ERROR

LED982

MODE

EXIT

SELECT ENTER

SW931

SW932 SW933

0.1sec 0.1sec

OFF

POWER MODE LED : on

ERROR LED : flashing

ERROR transition

"Err." and quantity are alternately shown.

When there is more than one error, display is changed by

Press the "SELECT" button

Press the "ENTER" button Press the "ENTER" button

Annunciation

Type of errors

Press the "SELECT" button

display change

If some error is newly occured or resolved

during transition, it is reflected after going

back to "Annunciation".

LED display

Operation button

ex : discharge thermistor 1 abnormal ex : indoor unit abnormal

02-11

LED981

LED962

LED961

POWER

MODE

ERROR

(GREEN)

LED982

(RED)

CHECK

SW934

Low noise operation

Defrost operation

Oil recovery operation

Heating mode

Error display mode

(Number of errors occured)

Error display mode

(Error code)

Error display for Check run

(Wiring number error)

Connected units display

(Only for Check run)

Error display for Check run

(Pipe number error)

Error display for Check run

(Wiring error)

Cooling mode

Idling(stop)

Indication type 7 Segment LED Pattern

Blank

"C" OO "L"

"H" EA "T"

"RUN"

"END"

"O" IL "R" ECOVERY

"D" E "F" ROST

"FAIL"

"P" OWER "OFF"

"C" HECK "RUN"

Number of Branch boxes

Number of Indoor units

"P" IPE ">" "L" INE

Blinking

"P" IPE "<" "L" INE

"DONE"

"P" eak "C" ut

"L" OW "N" OISE

Description

Power saving operation

Running the vacuum/

pump down mode

Running Check.

Memory clear

Indeterminable

Performing function failed

Power off

Preparation display

End of the function

End of Check run

During Oil recovery operation.

Refer to 01-25 page for operation.

During Cooling mode

During Heating mode

During Defrost operation.

Refer to 01-22 page for operation.

During Power saving operation.

Refer to 01-29 page for o

peration.

During Low noise operation.

Refer to 01-29 page for operation.

Number of errors occured are displayed.

(Ex. Two error codes present.)

Refer to 02-11 page for details.

Error codes are displayed.

(Ex. Discharge thermistor error)

Refer to 02-11 page for details.

Vacuum/ Pump down mode running.

Wiring check in Check run is performing.

When "P.oFF" is displayed,

turn off the power supplies of all units.

Number of "8888" is displayed

for 2 minutes after power on.

Number "0000" is blinking for 1 minute

when the memory is cleared after Check run

is finished.

Wiring error has occured.

(Ex. Connection of Terminal A on the primary BB

to Terminal B on secondary 2 BB is wrong.)

The external or room temperature is outside

the operating range of Check run.

Number of wirings between indoor unit and

branch box is n

ot correct.

Number of pipes between indoor unit and

branch box is not correct.

The function can not be performed.

The function is finished normally.

(Function is "Test-run start/ stop"

and "EEPROM memory clear".)

Check run is finished.

Alternating display

1st Branch box & terminal

2nd Branch box & terminal

ex.

02-12

Trouble

shooting

Error Contents

2-3-5 Error Code List for Outdoor Unit Display

Error

Code

Number of wires and pipes error

Indoor unit capacity error

Number of indoor units error

Number of Branch boxes error

Indoor Unit error

Outdoor unit model information error

Inverter error

A.F. voltage error

Display P.C.B. Communication Error

Discharge thermistor error

Compressor thermistor error

Heat Ex. Liquid outlet thermistor error

Outdoor thermistor error

Suction gas thermistor error

Heat sink thermistor error

Check run unfinished

Serial communication error

Trouble

shooting

Error Contents

Liquid pipe thermistor error

Sub cool heat EX. gas outlet thermistor error

Sub cool heat EX. gas inlet thermistor error 23

1,40 ~ 45

E. 1 1. 3

E. 1 1. 4

E. 1 5. 6

E. 2 1. 2

E. 2 2. 1

E. 2 4. 2

E. 2 4. 3

E. 5 U. 1

E. 6 2. 1

E. 6 3. 1

E. 6 4. 1

E. 6 A. 1

E. 7 1. 1

E. 7 2. 1

E. 7 3. 3

E. 7 4. 1

E. 7 5. 1

E. 7 7. 1

Discharge temp. error

Outdoor unit fan motor error

Compressor control error

Over current error

High pressure switch error

Suction pressure sensor error

4-way valve error

Discharge pressure sensor error

Current sensor error

Error

Code

Branch box error

Low pressure error

Compressor temp. error

1, 37 ~ 39

8 ~ 13,47,48

02-13

E. 8 2. 1

E. 8 2. 2

E. 8 3. 1

E. 8 4. 1

E. 8 6. 1

E. 8 6. 3

E. 8 6. 4

E. 9 4. 1

E. 9 5. 1

E. 9 7. 3

E. 9 9. 1

E. A 1. 1

E. A 3. 1

E. A 5. 1

E. J 2. U

EEPROM access error

Serial communication error between

Outdoor Unit and branch box

Serial communication error between

Indoor Unit A and branch box

Serial communication error between

Indoor Unit B and branch box

Serial communication error between

Indoor Unit C and branch box

Remote controller communication error

Serial communication error between

branch boxes

Serial communication error between

branch boxe

Model information error

Indoor Unit A, liquid pipe thermistor error

(CN309)

Indoor Unit A, gas pipe thermistor error

(CN309)

Indoor Unit A, EEV control error (CN305)

Indoor Unit B, EEV control error (CN306)

Indoor Unit C, EEV control error (CN307)

Indoor Unit B, liquid pipe thermistor error

(CN309)

Indoor Unit B, gas pipe thermistor error

(CN309)

Indoor Unit C, liquid pipe thermistor error

(CN310)

Indoor U

nit C, gas pipe thermistor error

(CN310)

Power frequency error

Connected combination error

Trouble

shooting

02-14

2-3-6 Error status for Branch Box Display

Branch box

identifying

display

Primary

unit

: (1)

Secondary

unit1

: (2)

Secondary

unit2

: (3)

When an error occurs, an error description displays in the LED (No.401 - 405).

Lit

Flashing (number of flashing)

Unlit

(n)

Comment

Green Red

LED401 LED402 LED403 LED404 LED405

(1)

(2)

(3)

(4)

(5)

(6)

(7)

(8)

(9)

Error Indication Flashing Pattern

02-15

0.5s + 1.0s0.5s0.5s 0.5s

0.5s 0.5s

0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s 0.5s + 1.0s

0.5s + 1.0s

1 cycle

OFF

LED401

LED402

LED403

OFF

LED404

OFF

LED405

Example : "Serial communication error between Indoor Unit B and branch box" at Secondary unit1

(LED401: 2times, LED402: 5times, LED403: Unlit, LED404: Lit, LED405: Unlit)

Trouble shooting 1

ALL UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause:

Indicate or Display:

YESYES

Serial Communication Error

(Serial Forward / Reverse Transfer Error)

Outdoor Unit

Indoor Unit

Branch Box

(Primary / secondary)

1. Connection failure 2. External cause 3. Main PCB(Outdoor unit) failure

4. Controller PCB(Indoor unit / Branch Box) failure

Check Point 1-1 : Reset the power and operate

Does error indication reappear?

Check Point 1-2 : Check external cause such as noise

Check if the ground connection.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment which causes harmonic wave).

Check Point 2 : Check connection

Check for loose or removed connection line of error.

>> If there is an abnormal condition, correct it by

referring to Installation Manual or Design&

Technical Manual.

Check connection condition in control unit.

(If there is loose connector, open cable or mis-wiring)

Check the error display of indoor unit

Replace Controller PCB of indoor unit of error.

Check the error display of each Branch Box(Primary / secondary)

Replace Controller PCB of Branch Box (Primary or Secondary) of error

and execute the check operation again.

When the branch box cannot properly receive the serial signal from

Outdoor unit / Indoor unit / Branch Box.

Indoor Unit : Refer to Connection line and Serial signal error list

(Page 13 )

Outdoor Unit :

Error Code :

2-4 TROUBLE SHOOTING

02-16

Check Point 3 : Check the error unit of indoor unit

Check the which case?

Case 1. When only one indoor unit error

Case 2. When more than one indoor unit error

Case 3. When all indoor unit error

When the Outdoor unit / Indoor unit cannot properly receive the

serial signal from Branch Box.

- When power is turn-on : 2 minutes.

- In operation : 15 seconds.

Case 1. When only one indoor unit error

02-17

Check the error display of each Branch Box (Primary or Secondary)

Replace Controller PCB of Branch Box (Primary or Secondary) of error and execute the check operation again.

Check the error display of Indoor unit

Replace Controller PCB of indoor unit of error

Case 2. When more than one indoor unit error (2unit or 3 unit)

Replace Controller PCB

Replace Controller PCB of Branch Box(Primary) and execute the check operation again.

Check the error of Branch Box(Primary)

Case 3. When all indoor unit error

Check the error display of each Branch Box(Secondary)

When Branch Box(Secondary) error

Replace Controller PCB of Branch Box(Secondary) of error

and execute the check operation again.

When Outdoor unit error

Check Point 1 Check the Outdoor Unit Filter PCB

Check F502 Fuse in Outdoor Unit Filter PCB.

>> If Fuse is open, replace F502 Fuse and Main PCB.

Check the LED display of outdoor unit

Check F380 Fuse in Outdoor Unit Inverter PCB.

>> If Fuse is open, replace F380 Fuse and Main PCB.

If does not improve the symptom,

>> Replace F380 Fuse and Main PCB.

>> Replace Inverter PCB and Protector P501 of Filter PCB.( If Destruction of IPM or DB)

>> Replace Inverter PCB , ACTPM and Protector P501 of Filter PCB.

Check the error display of Outdoor unit

Replace Main PCB of Outdoor unit and

execute the check operation again.

Check the error of Branch Box(Secondary) or error of Outdoor unit

When there is no LED display of outdoor unit

Branch Box

(Primary)

Branch Box 1

(secondary)

Branch Box 2

(secondary)

Outdoor unit

Connection Line (example)

Serial Forward Transfer Error

Serial signal error list

LED Display pattern of Indoor unit

1st - Operation LED

2nd - Timer LED

3rd - Economy LED

Serial Reverse Transfer Error

LED Display pattern of Branch Box

Lit

Unlit

(n) -

Flashing(number of flashing)

02-18

Number of flashes (0.5sec)

Continuous flash

- No display

Trouble shooting 2

INDOOR UNIT Error Method:

Wired Remote Controller

Communication Error

Indicate or Display:

Indoor Unit : Operation LED 1 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 1 2

Detective Actuators:

Indoor unit controller PCB

Wired Remote Controller

Detective details:

Upon receiving the signal more than 1 time from Wired Remote or other Indoor

unit, but the same signal has not been received more than 1 minute.

Check Point 2 : Check Remote controller and Controller PCB

Check terminal voltage of controller PCB Connector. (Power supply for Remote)

If DC12V, Remote Controller failure (C

ontroller PCB is OK) >>> Replace Remote Controller

If DC0V, Controller PCB failure (Remote is OK) >>> Replace

Controller PCB and execute the check operation again.

-In case of re-installation is done due to removed connector or incorrect wiring, turn on the power again

Check Point 1 : Check the connection of terminal

After turning off the power, check & correct the followings.

Indoor Unit - Check the connection of terminal between remote controller and Indoor unit,

and check if there is a disconnection or short of the cable.

Forecast of Cause : 1. Terminal connection abnormal 2. Wired Remote Controller failure 3. Controller PCB failure

Cassette / Duct Type CN14 , Wall mount Type CN6 , Small size Wall mount Type CN305(UTY-XCBXZ14)

02-19

Trouble shooting 3

INDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

Check run unfinished

Outdoor unit

Branch BOX

Check the number of indoor unit connected.

>> If the check operation not complete, execute it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, reset the power.

1. Check operation not complete 2. Outdoor Main PCB changed 3. Branch BOX PCB changed

Check Point 1 : Check the indoor unit number connection

02-20

When the operation command is input by remote controller without

check operation completion.

Indoor Unit : Operation LED 1 times Flash, Timer LED 5 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 15. 6

Error Code : 15

Indicate or Display:

Replace Main PCB, and execute the check operation again.

Check Point 2 : Replace Main PCB

INDOOR UNIT Error Method:

Number of Wires and Pipes Error

Indicate or Display:

Indoor Unit : Operation LED 2 times Flash, Timer LED 1 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.2 1.2

Error Code : 2 1

Detective Actuators: Detective details:

Forecast of Cause :

Indoor unit

Check the number of indoor unit connected.

>> If the check operation not complete, execute it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, reset the power.

1. Check operation not complete 2. Indoor Controller PCB changed 3. Branch BOX PCB changed

Check Point 1 : Check the indoor unit number connection

When the operation command is input by remote controller without

check operation completion.

When a PCB has been replaced.

Replace Controller PCB, and execute the check operation again.

Check Point 2 : Replace Controller PCB

Trouble shooting 4

INDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

Indoor Unit Capacity Error

All indoor unit

When the total capacity of indoor units is outside of range

between 38,000BTU and 63,000BTU.

1. The selection of indoor units is incorrect 2. Main PCB(Outdoor unit) failure

Check Point 1 : Check the total capacity of indoor unit

Check the total capacity of the connected indoor units.

>> If abnormal condition is found, correct it by referring

to Installation Manual or Design & Technical Manual.

02-21

Check Point 2 : Replace Main PCB

If Check Point 1 do not improve the symptom, replace Main PCB(Outdoor unit),

and execute the check operation again.

Indoor Unit : Operation LED 2 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 22. 1

Error Code : 22

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause:

Trouble shooting 5

INDOOR UNIT Error Method:

Indicate or Display:

Connected Combination Error

Indoor Unit

Branch Box

1. connections condition in Controller PCB(Indoor unit / Branch Box)

When power is on and one of the below occurs.

1. When the wirring is mistake

2. When the connection outdoor unit different.

3. When the connection indoor unit of unsupported multi.

Indoor Unit : Operation LED 2 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1 or E.J 2.U

Error Code : 2 3

02-22

Check the Indoor unit / Branch Box

>> If there is abnormal connect, correct it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, and execute the check operation again.

Check Point 1 : Check the Indoor unit / Branch Box

Trouble shooting 6

INDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

Number of Indoor Units Error

Indoor Unit

Check the indoor unit number connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, reset the power.

1. Indoor unit connection failure

Check Point 1 : Check the indoor unit number connection

02-23

When the total connection number of indoor units is outside of range

between 2 and 8.

Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 24. 2

Error Code : 24

Indicate or Display:

Trouble shooting 7

Branch Box Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

Number of Branch Boxes Error

Branch Box

Check the Branch Box power

>> If there is an abnormal condition, power turned on.

1. Branch box power failure

2. Branch box connection failure

Check Point 1 : Check the Branch box power

02-24

When the number of branch boxes and are different,

and the operation command is input to the outdoor unit.

Memorized number at the check operation.

Number of Serial forward signal.

Check the Branch Box connection.

>> If there is an abnormal condition, correct it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, reset the power.

Check Point 2 : Check the Branch box connection

Indoor Unit : Operation LED 2 times Flash, Timer LED 4 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 24. 3

Error Code : 24

Indicate or Display:

Trouble shooting 8

INDOOR UNIT Error Method:

Indoor Unit Model Information Error

EEPROM Access Abnormal

Indicate or Display:

Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 3 2

Detective Actuators:

Indoor Unit

Detective details:

3 continuous failure of read test of EEPROM at power on, or apparent model

information error from EEPROM. Also, error on model information upon model

information test of EEPROM, or Model information of EEPROM not possible to

recover.

Forecast of Cause : 1. External cause 2. connections condition in Controller PCB 3. Controller PCB failure

Check Point 3 : Replace Controller PCB

Change Controller PCB and execute the

check operation again.

Check Point 1-1 : Reset power supply and operate

YES

Does error indication show reappear?

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment which causes harmonic wave).

Check Point 2 :

Check connections condition in Controller PCB

Check all connectors.

(loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

02-25

Trouble shooting 9

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators: Detective details:

Forecast of Cause :

OKOK

Manual Auto Switch Error

Indoor Unit Controller PCB

Indicator PCB

Manual Auto Switch

When the Manual Auto Switch becomes ON for consecutive 30 or

more seconds.

1. Manual Auto Switch failure 2. Controller PCB and Indicator PCB failure

Check Point 1 : Check the Manual Auto Switch

Check if Manual Auto Switch is kept pressed.

Check ON/OFF switching operation by using a meter.

>> If Manual Auto Switch is disabled (on/off switching), replace it.

Check Point 2 : Replace Controller PCB and Indicator PCB

If Check Point 1 do not improve the symptom, replace Controller PCB and Indicator PCB

and execute the check operation again.

Indoor Unit : Operation LED 3 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : No Display

Error Code : 3 5

02-26

Trouble shooting 10

INDOOR UNIT Error Method:

Indoor Room Thermistor Error

Indicate or Display:

Indoor Unit : Operation LED 4 times Flash, Timer LED 1 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 4 1

Detective Actuators:

Indoor Unit Controller PCB Circuit

Indoor Temperature Thermistor

Detective details:

Indoor unit thermistor is open or short is detected always.

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failuer

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

If Thermistor is either open or shorted, replace it and reset the power.

Check Point 1 : Check connection of Connector

Check if connector is loose or removed

Check erroneous connection

Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

6.5

8.0

10.012.515.820.125.233.6Resistance Value ( )

776859504132

Temperature (°F)

3.54.35.3Resistance Value ( )

122113104

Temperature (°F)

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Small size Wall mount circuit diagram(Connector connection)

If the voltage does not appear, replace Controller PCB and execute the check operation again.

H/E (MID) Thermistor

Room Temp. Thermistor

H/E Thermistor

Cassette circuit diagram (Connector connection)

Wall mount Scircuit diagram (Direct soldering to PCB)

Duct circuit diagram (Connector connection)

BLACK

CN4

BLACK

CN3

CN1

RED

WHITE

H/E Thermistor

Room Temp. Thermistor

BLACK

CN5

CN8

GRAY

CN7

BLACK

CN5

CN8

GRAY

H/E (MID) Thermistor

Room Temp. Thermistor

02-27

Thermistor Characteristics (Rough value)

If Thermistor is either open or shorted, replace it and reset the power.

Trouble shooting 11

INDOOR UNIT Error Method:

Indoor Heat Ex. Thermistor Error

Indicate or Display:

Indoor Unit : Operation LED 4 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 4 2

Detective Actuators:

Indoor Unit Controller PCB

Heat Exchanger (MID) Thermistor

Detective details:

Indoor unit thermistor is open or short is detected always.

Resistance Value ( )

Temperature (°F)

32.4

40.0

49.862.579.1100.9129.8168.6

776859504132

Resistance Value ( )

Temperature (°F)

17.821.226.3

122113104

Forecast of Cause :

1. Connector failure connection 2. Thermistor failure 3. Controller PCB failuer

Check Point 1 : Check connection of Connector

Check if connector is loose or removed

Check erroneous connection

Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Small size Wall mount circuit diagram(Connector connection)

If the voltage does not appear, replace Controller PCB and execute the check operation again.

H/E (MID) Thermistor

Room Temp. Thermistor

H/E Thermistor

Cassette circuit diagram (Connector connection)

Wall mount circuit diagram (Direct soldering to PCB)

Duct circuit diagram (Connector connection)

BLACK

CN4

BLACK

CN3

CN1

RED

WHITE

H/E Thermistor

Room Temp. Thermistor

BLACK

CN5

CN8

GRAY

CN7

BLACK

CN5

CN8

GRAY

H/E (MID) Thermistor

Room Temp. Thermistor

02-28

Trouble shooting 12

INDOOR UNIT Error Method:

Indoor Unit Fan Motor Error

Indicate or Display:

Indoor Unit : Operation LED 5 times Flash, Timer LED 1 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 5 1

Detective Actuators:

Indoor Unit Controller PCB

Indoor Fan Motor

Detective details:

When Indoor fan control is either phase control or DC control and rotation feed

back control is ON, the feed back rotation value becomes 0 and lasts for more

than 1 minute at motor operation condition. Or, the feed back rotation value

continues at 1/3 of target value for more than 1 minute.

Check Point 2 : Check Motor winding

Check Indoor Fan motor

>>If Fan motor is abnormal, replace it.

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off.

(Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 3 : Check ambient temp. around motor

Check excessively high temperature around the motor.

(If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation..

Check Point 4 : Replace Controller PCB

Forecast of Cause : 1. Fan MOTOR failure 2. Fan motor winding open 3. Motor protection by surrounding temp. increase

4. Controller PCB failure

Change Controller PCB and execute the check operation again.

02-29

Trouble shooting 13

INDOOR UNIT Error Method:

Drainage Error

Indicate or Display:

Indoor Unit : Operation LED 5 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E.5 U.1

Error Code : 5 3

Detective Actuators:

Indoor Unit Controller PCB Circuit

Float Switch

Detective details:

When Float switch is ON for more than 3 minutes.

Check Point 1 : Check Float Switch

Check operation of float switch. (any blocking by dust, etc.)

Remove Float switch and check ON/OFF switching operation

by using a meter.

>>If Float switch is abnormal, replace it.

ON OFF

Forecast of Cause : 1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure

4. Drain pump failure 5. Hose clogging

Check Point 2 : Check Connector (CN 9) / Wire

Check loose contact of CN9 /shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

Check Point 4 : Check Controller PCB

If Check Point 1 ~ 3 do not improve the symptom, change

Controller PCB and execute the check operation again.

Attention!!

Wall mount / Small size wall mount type

does not have a float switch.

In this case, replace Controller PCB

and set up the original address.

Please refer to.

Check Point 3 : Check Drain Hose

Check Drain Hose .

>>If there is Hose clogging. Please clear the clog.

02-30

Outdoor Unit Model Information Error

YES

Check Point 1-2 : External cause

Outdoor unit Main PCB

Access to EEPROM failed due to some cause after outdoor unit started.

1. External cause (Noise, temporary open, voltage drop) 2. Main PCB failure

Check if temporary voltage drop was not generated.

Check if momentary open was not generated.

Check if ground is connected correctly or there are no related cables near the

power line.

Check Point 2 : Replace Main PCB

Change Main PCB, and execute the check operation again.

Check Point 1-1 : Turn the power

on agaun.

Error displayed again?

Indoor Unit : Operation LED 6 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 62. 1

Error Code : 62

02-31

Trouble shooting 14

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Error information received from Inverter PCB

Check if temporary voltage drop was not generated.

Check if temporary open was not generated.

Check if ground is connected correctly or there are no related cables near the

power line.

Connector and wiring connection state check

Cable open check

02-32

Inverter PCB

Main PCB

Filter PCB

1. External cause

2. Power supply line & Communication line to Filter PCB to Inverter PCB wiring disconnection, open

3. Inverter PCB failure

4. Main PCB failure

5. Filter PCB failure

Check Point 1-1 :

Turn the power on again.

Error displayed again?

Trouble shooting 15

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Check Point 2 : Check the wiring

(Inverter PCB to Main PCB, Inverter PCB to Filter PCB)

Check Point 3 : Replace Inverter PCB

Check Point 1-2 : External cause

Inverter Error

Indoor Unit : Operation LED 6 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 63. 1

Error Code : 63

If Check Point 1,2 do not improve the symptom, replace Inverter PCB(Outdoor unit),

and execute the check operation again.

Check Point 4 : Replace Main PCB

If Check Point 3 do not improve the symptom, replace Main PCB(Outdoor unit),

and execute the check operation again.

Check Point 5 : Replace Filter PCB

If Check Point 4 do not improve the symptom, replace Filter PCB(Outdoor unit),

and execute the check operation again.

Trouble shooting 16

OUTDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

A.F Voltage Error

Outdoor Unit Main PCB

Outdoor Unit ACTPM PCB

Check if the terminal connection is loose.

Check if connector is removed.

Check if connector is erroneous connection.

Check if cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

1. Connector connection failure 2. Inverter PCB failure 3. ACTPM failure

Check Point 1 : Check connections condition in control unit

Inverter low voltage protection

Inverter overvol

tage protection

02-33

Check Point 3 : Replace Inverter PCB

If Check Point 1,2 do not improve the symptom,

replace Inverter PCB, and

execute the check operation again.

Indoor Unit : Operation LED 6 times Flash, Timer LED 4 Times Flash

Economy LED Continuous Flash.

Outdoor Unit : E. 64. 1

Error Code : 64

Indicate or Display:

Check Point 2 : Check ACTPM

If ACTPM is abnormal, replace it.

Check ACTPM (PARTS INFORMATION 8).

Discharge Thermistor Error

CN62

THERMISTOR

(COMP SHELL)

THERMISTOR

(DIS.TEMP.)

BLACK

1234

Discharge temperature thermistor

Discharge temperature thermistor short detected

Discharge thermistor open detected

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN62:1-2) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

If the voltage does not appear, replace Main PCB,

and execute the check operation again.

Discharge temperature thermistor (CN62:1-2)

Indoor Unit : Operation LED 7 times Flash, Timer LED Times Flash,

Economy LED Continuous Flash.

Outdo

or Unit : E. 71. 1

Error Code : 71

02-34

Trouble shooting 17

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Compressor Thermistor Error

Compressor temperature thermistor

Compressor temperature thermistor short detected

Compressor thermistor open detected

1. Connector connection failure, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 14".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN62:3-4) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Compressor temperature thermistor (CN62:3-4)

Indoor Unit : Operation LED 7 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 72. 1

Error Code : 72

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

02-35

Trouble shooting 18

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

CN62

THERMISTOR

(COMP SHELL1)

THERMISTOR

(DIS.TEMP.1)

BLACK

1234

CN63

THERMISTOR

SC (LP OUT)

(HEX. PIPE. OUT.)

BLACK

123

BLACK

Heat exchanger liquid temperature

thermistor

Heat exchanger outlet temperature thermistor short or open detected

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN63:1-2) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Heat exchanger outlet temperature thermistor (CN63:1-2)

Indoor Unit : Operation LED 7 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 73. 3

Error Code : 73

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

If the voltage does not appear,

02-36

Heat Ex. Liquid Outlet Temp.

Thermistor Error

Trouble shooting 19

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Outdoor Thermistor Error

CN61

(OUT TEMP.)

THERMISTOR

123

BLACK

Outdoor temperature thermistor

Outdoor temperature thermistor short or open detected

1. Connector connection defective, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2: Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN61:1-3) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Outdoor temperature thermistor (CN61:1-3)

Indoor Unit : Operation LED 7 times Flash, Timer LED 4 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 74. 1

Error Code : 74

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

If the voltage does not appear, replace Main PCB

02-37

Trouble shooting 20

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Suction Gas Thermistor Error

CN66

BLACK

1 2 3

Suction gas temperature thermistor

Suction gas temperature thermistor short or open detected

1. Connector connection defective, open

2. Thermistor failure3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN66:1-3) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Suction gas temperature thermistor (CN66:1-3)

Indoor Unit : Operation LED 7 times Flash, Timer LED 5 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 75. 1

Error Code : 75

If the voltage does not appear, replace Main PCB, and execute

the check operation.

02-38

THERMISTOR

(SUC. TEMP)

Trouble shooting 21

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Heat Sink Thermistor Error

Inverter PCB

Heat sink temperature thermistor (Built-in IPM) open/short detected

1. Inverter PCB failure

Indoor Unit : Operation LED 7 times Flash, Timer LED 7 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 77. 1

Error Code : 77

02-39

Trouble shooting 22

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

If this error is displayed, replace Inverter PCB

Sub-cool Heat EX. Gas Inlet

Thermistor Error

CN65

BLACK

2 34

1234

BLACK

Sub-cooling heat exchanger gas inlet

temperature thermistor

Sub-cooling heat exchanger gas inlet temperature thermistor short or

open detected

1. Connector connection defective, open

2. Thermistor failure3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN65:1-2) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Sub-cooling heat exchanger gas inlet thermistor (CN65:1-2)

Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 82. 1

Error Code : 82

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-40

THERMISTOR

(SC.INT.GAS)

THERMISTOR

(SC.OUT.LIQ)

Trouble shooting 23

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Sub-cooling heat exchanger gas outlet

temperture thermistor

Sub-cooling heat exchanger gas outlet temperture thermistor short or

open detected

1. Connector connection failur, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN63:4-5) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Indoor Unit : Operation LED 8 times Flash, Timer LED 2 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 82. 2

Error Code : 82

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-41

Sub-cool Heat Ex. Gas Outlet

Thermistor Error

Trouble shooting 24

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Heat exchanger liquid outlet thermistor (CN63:4-5)

CN63

THERMISTOR

(SC. GAS. OUT.)

(HEX. PIPE. OUT.)

BLACK

123

BLACK

Heat exchanger liquid outlet thermistor

Heat exchanger liquid pipe thermistor short or open detected

1. Connector connection failur, open

2. Thermistor failure

3. Main PCB failure

Check Point 1 : Check the connector connection and cable open

Connector connection state check

Cable open check

Check Point 2 : Check the thermistor

Thermistor characteristics check (Disconnect the thermistor from the PCB and check.)

* For the thermistor characteristics, refer to the "Service Parts Information 5".

Check Point 3 : Check voltage of Main PCB (DC5.0V)

Main PCB (CN63:1-2) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Indoor Unit : Operation LED 8 times Flash, Timer LED 3 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 83. 1

Error Code : 83

If the voltage does not appear, replace Main PCB

and execute the check operation again.

02-42

Liquid Pipe Thermistor Error

Trouble shooting 25

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Heat exchanger liquid outlet thermistor (CN63:1-2)

CN63

THERMISTOR

(SC. GAS. OUT.)

(HEX. PIPE. OUT.)

BLACK

123

BLACK

Judgment from value sensed by current

sensor (current sensor for inverter)

* Current sensor is mounted on

Filter PCB

1. Filter PCB to Inverter PCB CT system wiring connector disconnection, open

2. Filter PCB failure (Power supply section, current sensor section)

3. Inverter PCB failure

Check Point 1 : Filter PCB to Inverter PCB CT system wiring connection state

Connector and wiring connection state check

Cable open check

Check Point 2 : Check Filter PCB and Inverter PCB

Indoor Unit : Operation LED 8 times Flash, Timer LED 4 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 84. 1

Error Code : 84

02-43

Current Sensor Error

Trouble shooting 26

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

When the compressor stops and 30seconds has passed,

and the current value from INVERTER is over than 15A,

outdoor unit is stopped permanently by protection.

If Check Point 1 do not improve the symptom, replace Filter PCB

Check Point 3 : Check Filter PCB and Inverter PCB

If Check Point 2 do not improve the symptom, replace Inverter PCB.

Discharge Pressure Sensor Error

Forecast of Cause :

Check Point 3 : Check voltage of Main PCB (DC5.0V)

CN91

WHITE

RED

PRESSURE

SENSOR

(HIGH)

123

BLACK

Discharge pressure sensor

When any of the following conditions is satisfied, a discharge pressure

sensor error is generated.

1. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected value 0.3V continued for 30 seconds

or more

2. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected value 5.

0V was detected.

1. Discharge pressure sensor connector disconnection, open

2. Discharge pressure sensor failure3. Main PCB failure

Check Point 1 : Check the discharge pressure sensor connection state

Connector connection state check

Cable open check

Check Point 2 : Check the discharge pressure sensor

Sensor characteristics check

* For the characteristics of the discharge pressure sensor,

refer to the "Service Parts Information 6".

Main PCB (CN91:1-4) voltage value = 5V

Remove the thermistor from Main PCB, check the volt

age.

Discharge pressure sensor (CN91:1-4)

Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 86. 1

Error Code : 86

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

02-44

Trouble shooting 27

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Trouble shooting 28

OUTDOOR UNIT Error Method:

Suction Pressure Sensor Error

Indicate or Display:

Check Point 3 : Check voltage of Main PCB (DC5.0V)

CN92

WHITE

RED

PRESSURE

SENSOR

(LOW)

123

BLACK

Detective Actuators:

Detective details:

Forecast of Cause :

Suction pressure sensor

When any of the following conditions is satisfied, a suction pressure

sensor error is generated.

1. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected value 0.06V continued for 30

seconds or more.

2. 30 seconds or more have elapsed since the outdoor unit power was turned

on and pressure sensor detected v

alue 5.0V was detected.

1. Suction pressure sensor connector disconnection, open

2. Suction pressure sensor failure3. Main PCB failure

Check Point 1 : Check the suction pressure sensor connection state

Connector connection state check

Cable open check

Check Point 2 : Check the suction pressure sensor

Sensor characteristics check

* For the characteristics of the suction pressure

sensor,

refer to the "Service Parts Information 6".

Suction pressure sensor (CN92:1-3)

Main PCB (CN92:1-3) voltage value = 5V

Remove the thermistor from Main PCB, check the voltage.

Outdoor Unit : E. 86. 3

Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash,

Economy LED Continuous Flash.

Error Code : 86

If the voltage does not appear, replace Main PCB

, and execute

the check operation again.

02-45

Trouble shooting 29

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

High pressure switch

Detective details:

Forecast of Cause :

1. High pressure switch connector disconnection, open

2. High pressure switch characteristics failure3. Main PCB failure

When the power was turned on, "high pressure switch : open" was detected.

Check Point 1 : Check the high pressure switch connection state

Connector and wiring connection state check

Cable open check

Check Point 2 : Check the high pressure switch characteristics

Switch characteristics check

* For the characteristics of high pressure switch, refer to below.

Check Point 3 : Replace Main PCB

Change Main PCB, and execute the check operation again.

Outdoor Unit : E. 86. 4

Indoor Unit : Operation LED 8 times Flash, Timer LED 6 Times Flash,

Economy LED Continuous Flash.

Error Code : 86

02-46

High Pressure Switch Error

Type of contact

Characteristics of pressure switch

Pressure

Pressure switch 1

608.7 14.5 PSI

463.8 21.7 PSI

Contact : Short Open

Contact : Open Short

(CN101)

Over Current Error

1. Outdoor unit fan operation defective, foreign matter on hear exchanger, excessive rise of ambient

temperature

2. Inverter PCB failure

3. Inverter compressor failure (lock, winding short)

Inverter PCB

"Protection stop by "overcurrent generation after inverter compressor start

processing completed'''' generated consecutively 10 times.

* The number of generations is reset if the start-up of the compre

ssor succeeds.

No obstructions in air passages?

Heat exchange fins clogged

Outdoor unit fan motor check

Ambient temperature not raised by the effect of other heat sources?

Discharged air not sucked in?

Check Point 3 : Replace the Inverter compressor

Inverter compressor replacement

Check Point 2 : Check the Inverter PCB

Inverter PCB check

Check Point 1 : Check the outdoor unit fan operation, heat exchanger, ambient temperature

Indoor Unit : Operation LED 9 times Flash, Timer LED 4 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 94. 1

Error Code : 94

02-47

Trouble shooting 30

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Trouble shooting 31

OUTDOOR UNIT Error Method:

Detective Actuators: Detective details:

Forecast of Cause :

Compressor Control Error

Outdoor Unit Inverter PCBCompressor

Check if the terminal connection is loose.

Check if connector is removed.

Check if connector is erroneous connection.

Check if cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

1. Connector connection failure 2. Inverter PCB failure 3.Compressor failure

Check Point 1 : Check connections condition in control unit

When "compressor location detection error" is detected consecutively

5 times, within 40 seconds after start-up.

(Compressor location detection becomes over than 90°)

02-48

Indoor Unit : Operation LED 9 times Flash, Timer LED 5 Times Flash

Economy LED Continuous Flash.

Outdoor Unit : E. 95. 1

Error Code : 95

Indicate or Display:

Wiring connection state check

Cable open check

Check Point 4 : Replace the Inverter PCB

Check Point 3 : Check the Inverter compressor

Inverter compressor check (Refer to Service Parts Information 1. 2)

Check Point 2 : Check the Inverter PCB to inverter compressor connection state

Check Point 5 : Replace the Inverter compressor

If Check Point 1~3 do not improve the symptom, replace Inverter PCB.

If Check Point 4 do not improve the symptom, replace Inverter compressor.

Outdoor Unit Fan Motor Error

1. Rotation obstruction by foreign object

2. Motor wiring, connector disconnected, open

3. Fan motor failure (winding open, lock)

4. Main PCB failure (drive circuit, speed detection circuit)

Outdoor unit fan motor

Outdoor unit Main PCB

Check if fan can be rotated by hand.

Motor winding resistance check(PARTS INFORMATION 7)

Motor operation check

Check Point 2 : Check the motor wiring, connector disconnection, open

Check for motor wiring connector disconnection, open.

Check Point 3 : Fan motor defective

Check Point 1 : Fan rotation state check

Check for the absence of foreign matter around the fan.

Indoor Unit : Operation LED 9 times Flash, Timer LED 7 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 97. 3

Error Code : 97

02-49

Trouble shooting 32

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

When fan speed 100rpm within 20 seconds after fan motor operation

issued, fan motor is stopped by protection stop.

When protection repeats 3 times within 60minutes, compressor and fan

motor are stopped by protection stop.

* The number of generations is reset if the protection not detects within

60 seconds.

When protection repeats 5 times, compressor and fan motor are stopped

by protection stop.

The number of generations is reset if the protection not detects within

60 seconds after protection stop

Check Point 4 : Check output voltage of Main PCB

If the voltage is not correct, replace Main PCB, and execute the check operation again.

BLACK

BLUE

RED

WHITE

YELLOW

CN243

3456

FAN MOTOR

Check outdoor unit circuit diagram and the voltage.

(Measure at Main PCB side connector 243)

>>1 pin(Red) - 4 pin(Black) DC250V ~ 400V

>>4 pin(Black) - 5 pin(White) DC15V 2V

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

1. Connector connection failure 2. Thermistor failure 3. Coil failure 4. 4-way valve failure

5. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection.

Check if thermistor cable is open.

>> Upon correcting the removed connector or mis-wiring, reset the power.

Check Point 3 : Check the solenoid coil and 4-way valve

02-50

[ Solenoid coil ]

Remove CN30 from PCB and check the resistance value of coil.

Resistance value is about 1.4k

>> If it is Open or abnormal resistance value, replace Solenoid Coil.

[ 4-way valve ]

Check each piping temperature,

and the location of the valve by the temperature difference.

>> If the value location is not proper, replace 4-way valve.

OKOK

Check Point 4 : Replace Main PCB

If Check Point 1- 3 do not improve the symptom, replace Main PCB,

and execute the check operation again.

Check Point 2 : Check thermistor

Isn’t it fallen off the holder?

Is there a cable pinched?

>> Check characteristics of thermistor, If defective, replace the thermistor.

Indoor Unit Controller PCB Circuit

Heat Exchanger Temperature Thermistor

Room Temperature Thermistor

4-way valve

When the indoor heat exchanger temperature is compared with

the room temperature, and either following condition is detected

continuously two times, the compressor stops.

Cooling or Dry operation

[Indoor heat exchanger temp.] - [Room temp.] > 50degF

Heating operation

[indoor

heat exchanger temp.] - [Room temp.] < -50degF

If the same operation is repeated 2 times,

the compressor stops permanently.

Trouble shooting 33

OUTDOOR UNIT Error Method:

4-way valve error

Indoor Unit : Operation LED 9 times Flash, Timer LED 9 Times Flash

Economy LED Continuous Flash.

Outdoor Unit : E. 99. 1

Error Code : 99

Indicate or Display:

Discharge Temp. Error

2. EEV defective, strainer clogged

3. Outdoor unit operation

failure, foreign matter on heat exchanger

4. Discharge temperature thermistor

failure

5. Insufficient refrigerant

Discharge temperature thermistor

"Protection stop by "discharge temperature 239degF during compressor

operation'''' generated 2 times within 24 hours.

Check Point 1 : Check if 3-way valve(gas side) is open.

Discharger thermistor characteristics check

(Check by disconnecting thermistor from PCB.)

* For the characteristics of the thermistor, refer to the "Service Parts Information 5".

Check Point 4 : Check the discharge thermistor

EEV (EEV2, indoor unit EEV) open?

Strainer clogging check (before and after EEV, ACM

oil return)

Refer to "Service Parts Information 3, 4 "

Check Point 3 : Check the outdoor unit fan,heat exchanger

Check for foreign object at heat exchanger

Check if fan can be rotated by hand.

Motor check(PARTS INFORMATION 7)

Check Point 2 : Check the EEV, strainer

Check Point 5 : Check the refrigerant amount

Leak check

EEV (EEV1, EEV2) open?

Strainer clogging check (before and after EEV, ACM

oil return)

Refer to "Service Parts Information 3, 4"

Check Point 2 : Check the EEV, strainer

If the 3-way valve(gas side) was closed, open the

3-way valve(gas side) and check operation.

Indoor Unit : Operation LED 10 times Flash, Timer LED 1 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. A1. 1

Error Code : A1

02-51

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the

3-way valve(liquid side) and check operation.

1. 3-way valve not opened

Trouble shooting 34

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Compressor Temp. Error

1. 3-way valve not opened

2. EEV defective, strainer clogged

3. Outdoor unit operation

failure, foreign matter on heat exchanger

4. Compressor temperature thermistor

failure

5. Insufficient refrigerant

Compressor temperature thermistor

Compressor temperature thermistor characteristics check

(Check by disconnecting thermistor from PCB)

* For the characteristics of the thermistor, refer to the "Service Par

ts Information 5.

Check Point 4 : Check the compressor temperature thermistor

Check Point 3 : Outdoor unit fan, heat exchanger chek

Check for foreign object at heat exchanger

Check if fan can be rotated by hand.

Motor check(PARTS INFORMATION 7)

Check Point 5 : Check the refrigerant amount

Leak check

Indoor Unit : Operation LED 10 times Flash, Timer LED 3 Times Flash,

Econom

y LED Continuous Flash.

Outdoor Unit : E. A3. 1

Error Code : A3

02-52

Check Point 1 : Check if 3-way valve(gas side) is open.

EEV (EEV2, indoor unit EEV) open?

Strainer clogging check (before and after EEV, ACM

oil return)

Refer to "Service Parts Information 3, 4".

Check Point 2 : Check the EEV, strainer

EEV (EEV1, EEV2) open?

Strainer clogging check (before and after EEV, ACM

oil return)

Refer to "Service Parts Information 3,4 ".

Check Point 2 : Check the EEV, strainer

If the 3-way valve(gas side) was closed, open the

3-way valve(gas side) and check operation.

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the

3-way valve(liquid side) and check operation.

"Protection stop by "compressor tempreture" 233degF during compressor

operation""generated 2 times within 24 hours

Trouble shooting 35

Indicate or Display:

Detective Actuators:

Detective details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Trouble shooting 36

OUTDOOR UNIT Error Method:

Low Pressure Error

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

1. 3-way valve not opened 2. Outdoor unit ambient temperature too low

3. Outdoor unit fan operation defective, foreign matter at heat exchanger

4. EEV defective, strainer clogged 5. Solenoid valve defective

6. Low pressure sensor characteristics defective 7. Insufficient refrigerant

Suction pressure sensor

"Protection stop by suction pressure 7.35PSI continued for 5 minutes"

repeats 5 times w

ithin 2 hours.

No foreign oblect in air passage?

Heat exchange fins clogged

Fan rotates?

Outdoor unit fan motor check

Check Point 3 : Check the outdoor unit fan operation,

heat exchanger

Check Point 2 : Check the outdoor unit ambient temperature

Outdoor ambient temperature lower than operating range?

Outdoor unit EEV1 operation check

Strainer not clogged?

Check Point 4 : Check the outdoor unit EEV, strainer clogging

Indoor unit EEV operation check

Strainer not clogged?

strainer clogging

Suction pressure sensor characteristics check

* For the characteristics of the suction pressure sensor

(PARTS INFORMATION 5)

Check Point 6 : Check the suction pressure sensor

Check Point 7 : Check the refrigerant amount

Leak check

Check Point 5 : Check the solenoid valve (SV1)

Solenoid valve operation check

Indoor Unit : Operation LED 10 times Flash, Timer LED 5 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. A5. 1

Error Code : A5

02-53

Check Point 1 : Check if 3-way valve(gas side) is open.

If the 3-way valve(gas side) was closed, open the

3-way valve(gas side) and check operation.

Check Point 1 : Check if 3-way valve(liquid side) is open.

If the 3-way valve(liquid side) was closed, open the

3-way valve(liquid side) and check operation.

Refer to "Sevice Parts Information 3"

Connected combination error

Outdoor unit

Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. 11. 3

Branch Box : LED401/ 402/ 403/ 404/ 405 Lit

Error Code : 11

02-54

Trouble shooting 37

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

1. Connected outdoor unit

Check the outdoor unit

>> If there is another outdoor unit, correct it by referring to Installation Manual

or Design & Technical Manual.

>> Upon correcting incorrect setting, reset the power.

Check Point 1 : Check the outdoor unit

When another outdoor unit in the future is connected to

the terminal "Outdoor unit" of Primary branch box.

Power frequency error 1

Branch Box Controller PCB

Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. 11. 3 or E. 11. 4

Branch Box : LED401/ 402/ 403/ 404 Lit, LED405 Unlit

Error Code : 11

02-55

Trouble shooting 38

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

YES

When 4 continuous failures occurred at Power frequency test.

(Power supply of Branch Box)

1. Connection failure 2. External cause 3. Controller PCB failure

Check Point 1-1 : Reset the power supply and operate

Does error indication reappear?

Check Point 2 : Check connection

Check Cable/Breaker.

Check loose or removed connection.

>> If there is an abnormal condition, correct it by

referring to Installation Manual or Design &

Technical Manual.

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears

at Branch Box terminal "Power" L1 - L2.

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment which causes harmonic wave).

Check Point 4 : Replace Controller PCB.

If Check Point 1 ~ 3 do not improve the symptom,

replace Controller PCB.

Power frequency error 2

Branch Box Controller PCB

Outdoor unit Main PCB

Outdoor Filter PCB

Outdoor Unit : E. 11. 3 or E. 11. 4

Error Code : 11

02-56

Trouble shooting 39

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

When 4 continuous failures occurred at Power frequency test.

( Branch Box (Primary) : Power supply for communication to outdoor unit.

Branch Box (Secondary) : Power supply for communication to

primary branch box.)

1. Connection failure 2. External cause 3. Controller PCB failure 4. Outdoor Main PCB failure

5. Outdoor Filter PCB failure

YES

Check Point 1-1 : Reset the power supply and operate

Does error indication reappear?

Check Point 2 : Check connection

Check Cable/Breaker.

Check loose or removed connection.

>> If there is an abnormal condition, correct it by

referring to Installation Manual or Design &

Technical Manual.

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment whic

h causes harmonic wave).

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

[Primary branch box]

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears

at Branch box terminal "Outdoor unit" 1 - 2 (CN105).

[Secondary branch box]

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears

at Branch box terminal "Branch box" 1 - 2 (CN105).

If the voltage does not appear, replace Outdoor Filter PCB.

If the voltage does not appear, replace Branch box controller PCB

Indoor Unit : Operation LED 1times Flash, Timer LED 1times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Branch Box : LED401/ 402/ 403 Lit, LED404 Unlit, LED405 Lit

EEPROM access error

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 1time Flash, LED403/ 404/ 405 Unlit

Error Code : J2

02-57

Trouble shooting 40

Indicate or Display:

Branch Box Error Method:

Branch Box Controller PCB

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Replace Controller PCB

YES

Check Point 2 : Check connections condition.

1. External cause 2. Defective for connection in controller unit 3. Controller PCB failure

Check Point 1-1 : Reset power supply and operate

Does error indication show reappear?

Check all connectors.

(loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

If Check Point 1, 2 do not improve the symptom,

replace Controller PCB.

When power is on and the access to EEPROM failed.

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment which causes harmonic wave).

Model information error

Branch Box Controller PCB

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 2times Flash, LED403/ 404/ 405 Unlit

Error Code : J2

02-58

Trouble shooting 41

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

Check Point 3 : Replace Controller PCB

YES

Check Point 2 : Check connections condition.

1. External cause 2. Defective for connection in controller unit 3. Controller PCB failure

Check Point 1-1 : Reset power supply and operate

Does error indication show reappear?

Check all connectors.

(loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

If Check Point 1, 2 do not improve the symptom,

replace Controller PCB.

When power is on and model information of EEPROM is incorrect.

Check Point 1-2 : Check external cause such as noise

Check if the ground connection is proper.

Check if there is any equipment that causes harmonic wave

near the power cable (Neon light bulb or any electronic

equipment which causes harmonic wave).

Indoor Unit A, B, C, liquid pipe

thermistor error (CN309 / 310)

Branch Box Controller PCB

Indoor unit A,B,C Liquid pipe Thermistor

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 6times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit

(Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit

(Indoor unit C):

LED403/ 404 Unlit, LED405 Lit

Error Code : J2

02-59

Trouble shooting 42

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

Thermistor Characteristics (Rough value)

If Thermistor is either open or shorted, replace it and reset the power.

When open or shorted Liquid pipe Thermistor is detected.

Resistance Value (k )

Temperature (°F)

32.4

40.0

49.862.579.1100.9129.8168.6

776859504132

17.821.226.3

122113104

1. Connection failure 2. Thermistor failure 3. Controller PCB failure

Check Point 1 : Check connection of Connector

Check if connector is loose or removed

Check erroneous connection

Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Liquid pipe Thermistor (Unit A) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit B) (CN309 Wire:Black)

Gas pipe Thermistor (Unit A) (CN309 Wire:Black)

Gas pipe Thermistor (Unit B) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit C) (CN310 Wire:Black)

Gas pipe Thermistor (Unit C) (CN310 Wire:Black)

Schematic Diagram (Connector connection)

Resistance Value (k )

Temperature (°F)

If the voltage does not appear, replace Controller PCB .

Indoor Unit A, B, C, gas pipe

thermistor error (CN309 / 310)

Branch Box Controller PCB Circuit

Indoor unit A,B,C Gas pipe Thermistor

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 7times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit

(Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit

(Indoor unit C):

LED403/ 404 Unlit, LED405 Lit

Error Code : J2

02-60

Trouble shooting 43

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

Thermistor Characteristics (Rough value)

If Thermistor is either open or shorted, replace it and reset the power.

When open or shorted Liquid pipe Thermistor is detected.

Resistance Value (k )

Temperature (°F)

32.4

40.0

49.862.579.1100.9129.8168.6

776859504132

17.821.226.3

122113104

1. Connection failure 2. Thermistor failure 3. Controller PCB failure

Check Point 1 : Check connection of Connector

Check if connector is loose or removed

Check erroneous connection

Check if thermistor cable is open

>>Reset Power when reinstalling due to removed connector or incorrect wiring.

Check Point 2 : Remove connector and check Thermistor resistance value

Check Point 3 : Check voltage of Controller PCB (DC5.0V)

Make sure circuit diagram of each indoor unit and check terminal voltage at Thermistor (DC5.0V)

Liquid pipe Thermistor (Unit A) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit B) (CN309 Wire:Black)

Gas pipe Thermistor (Unit A) (CN309 Wire:Black)

Gas pipe Thermistor (Unit B) (CN309 Wire:Black)

Liquid pipe Thermistor (Unit C) (CN310 Wire:Black)

Gas pipe Thermistor (Unit C) (CN310 Wire:Black)

Schematic Diagram (Connector connection)

Resistance Value (k )

Temperature (°F)

If the voltage does not appear, replace Controller PCB .

Indoor Unit A, B, C, EEV control error

(CN305 / 306 / 307)

Branch Box Controller PCB

EEV

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 8times Flash

(Indoor unit A): LED403 Lit, LED404/ 405 Unlit

(Indoor unit B): LED403 Unlit, LED404 Lit, LED405 Unlit

(Indoor unit C): LED403/ 404 Unlit, LED405 Lit

Error Code : J2

02-61

Trouble shooting 44

Indicate or Display:

Detective Actuators:

Detective details:

Branch Box Error Method:

Forecast of Cause :

1. Connection failure 2. EEV failure 3. Controller PCB failure

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

If Resistance value is abnormal, replace EEV.

Read wire

± 4

Resistance value (68°F)

Check Point 1 : Check Connections

Check Connectors (Loose connector or open cable.)

Check Point 3 : Check Voltage from Controller PCB

Remove Connector and check Voltage (DC12V).

>> If it does not appear, replace Controller PCB.

White - Red

Orange - Red

Yellow - Red

Blue - Red

In cooling or dry operation, when the Indoor unit heat exchanger temperature

becomes lower than 3degC for 5minutes,the compressor stops and

EEV is initialized.

After the compressor restarts, if the same protection is repeated within

1hr, the compressor stops permanently.

02-62

Check Point 5 : Check Opening and Closing Operation of Valve

When Valve is closed,

it has a temp. difference between Inlet and Outlet.

Pipe (In) Pipe (Out)Pipe (In) Pipe (Out)

Check Point 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in (1), but if there is a difference

as shown in (2), there is a possibility of inside clogged. In this case, replace Strainer.

(1) (2)

If it is open,

it has no temp. difference between Inlet and Outlet.

Pipe (In)

Pipe (Out)

Hi TEMP.

Normal TEMP.

Example : Hot Gas

Pipe (In)

Pipe (Out)

Hi TEMP.

OPEN

Example : Hot Gas

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

>> If an abnormal noise does not show, replace Controller PCB.

Remote controller communication

error

Indoor Unit : Operation LED 13times Flash, Timer LED 2times Flash,

Economy LED Flashing (0.1s ON / 0.1s OFF)

Outdoor Unit : E. J2. U

Branch Box : LED402 9times Flash, LED403/ 404/ 405 unlit

Error Code : J2

02-63

Trouble shooting 45

Indicate or Display:

Branch Box Error Method:

Branch Box Controller PCB

Home controller

Detective Actuators:

Detective details:

Forecast of Cause :

More than 1 time of signal from Home controller and other Branch box

is received, but it was not received more than 1 minute.

Upon receiving the signal more than 1 time from Home controller,

but the same signal has not been received more than 1 minute.

1. Terminal connection abnormal 2. Home Controller failure 3. Controller PCB failure

Check Point 2 : Check Home controller and Controller PCB

Check terminal voltage of controller PCB Connector (CN304). (Power supply for Home controller)

If DC12V, Home controller failure (Controller PCB is OK) >>> Replace Home controller

If DC0V, Controller PCB failure (Remote is OK) >>> Replace Controller PCB

In case of re-installation is done due to removed connector or incorrect

wiring, turn on the power again.

Check Point 1 : Check the connection of terminal

After turning off the power, check & correct the followings.

Branch box - Check the connection of terminal between Home controller and Branch box,

or between other Branch boxes, and check if there is a disconnection or short of the cable.

If there is the error display at the I/O PCB

>> I/O PCB or Main PCB is defective

>> Replace I/O PCB or Main PCB

If there is not the error display at the I/O PCB

>> I/O PCB is defective

>> Replace I/O PCB

If Outdoor unit error code is "E.6A.1" and Indoor unit error code is "E.11.1" or "E.11.2"

(E.11.1 and E.11.2 is Serial reverse transfer error)

>> Main PCB is defective

>> Replace Main PCB

Display P.C.B. Communication Error

Outdoor unit Main PCB

Outdoor unit I/O PCB

Communication not received from I/O PCB for 10 seconds or more

1. Main to I/O PCBs wiring connection defective

2. I/O PCB defective

3. Main PCB defective

Check Point 1 : Check the I/O to Main PCB wiring

Connector and wiring connection state check

Cable open check

Check Point 2 : Check I/O PCB and Main PCB

Indoor Unit : Operation LED 6 times Flash, Timer LED 10 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 6A. 1

Error Code : 6A

02-64

Trouble shooting 46

Indicate or Display:

Detective Actuators:

Detective

details:

OUTDOOR UNIT Error Method:

Forecast of Cause :

Detective Actuators:

Detective details:

Forecast of Cause :

Indoor unit Controller PCB

Limit switch

Damper

When limit switch were not able to detect the close though the damper close.

(Upper air flow)

When limit switch were not able to detect the open though the damper open.

(Upper & Lower air flow)

1. Limit switch failure 2. Shorted connector/ wire 3. Damper faulure

4. Controller PCB failure

Check Point 2 : Check Point 2 : Check Connector (CN18) / Wire

Check Point 1 : Check Limit switch

Check Point 4 : Replace Controller PCB

OKOK

Check operation of limit switch. (any blocking by dust, etc.)

Remove Limit switch and check ON/OFF switching operation by using a meter.

>>If Limit switch is detective, replace it.

Check loose contact of CN18 /shorted wire (pinched wire).

>>Replace Limit switch if the wire is abnormal

Check Point 2 : Check Point 3 : Check Damper

OKOK

>>Replace Damper if the damper is abnormal

If Check Point 1 3 do not improve the symptom, change Controller PCB.

Check the obstruction of damper movement.

Check the damper movement.

Trouble shooting 47-1

INDOOR UNIT Error Method:

Damper error

(Damper(Open/Close) detection Limit switch error)

02-65

Indicate or Display:

Indoor Unit : Operation LED 5 times Flash, Timer LED 7 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 5U. 1

Error Code : 57

Detective Actuators:

Detective details:

Forecast of Cause :

Indoor unit Controller PCB

Limit switch

When the limit switch detects open and close at the simultaneous.

1. Limit switch failure 2. Shorted connector/ wire 3. Controller PCB failure

Check Point 2 : Check Point 2 : Check Connector (CN18) / Wire

Check Point 1 : Check Limit switch

Check Point 3 : Replace Controller PCB

OKOK

Check operation of limit switch. (any blocking by dust, etc.)

Remove Limit switch and check ON/OFF switching operation by using a meter.

>>If Limit switch is detective, replace it.

Check loose contact of CN18 /shorted wire (pinched wire).

>>Replace Limit switch if the wire is abnormal

OKOK

If Check Point 1 & 2 do not improve the symptom, change Controller PCB.

Trouble shooting 47-2

INDOOR UNIT Error Method:

Damper error

(Damper(Open/Close) simultaneous detection

Limit switch error)

02-66

Indicate or Display:

Indoor Unit : Operation LED 5 times Flash, Timer LED 7 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 5U. 1

Error Code : 57

02-67

Trouble shooting 48

INDOOR UNIT

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Intake Grille Error

When the Micro switch is detected open while running the compressor.

1. Micro switch failure 2. Shorted connector/ wire 3.Controller PCB failure

Indicate or Display:

Check Point 2 : Check Point 2 : Check Connector (CN11) / Wire

Check Point 1 : Check Limit switch

Check Point 3 : Replace Controller PCB

Check operation of Micro switch. (any blocking by dust, etc.)

>>If Micro switch is detective, replace it.

Check loose contact of CN11 /shorted wire (pinched wire).

>>Replace Micro switch if the wire is abnormal

If Check Point 1 & 2 do not improve the symptom, change Controller PCB.

Remove Micro switch and check ON/OFF switching operation by using a meter.

Indoor unit Controller PCB

Micro switch

Indoor Unit : Operation LED 5 times Flash, Timer LED 8 Times Flash,

Economy LED Continuous Flash.

Outdoor Unit : E. 5U. 1

Error Code : 58

SERVICE PARTS INFORMATION 1

PSI

Compressor

Diagnosis method of Compressor (If outdoor unit LED displays error, refer to Trouble shooting )

Does not start up

Is there open or loose connection

cable?

Check

connection of Compressor,and winding

resistance. (Refer to the next page).

Check Inverter PCB

connection of Compressor,and winding

resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor can be

considered. (Compression part broken or valve defective.)

>> If there is no failure, the defect of

Compressor is considered (Locked

compressor due to clog

ged dirt or

less oil)

Replace Compressor

Stops soon after starting up

Is there open or loose connection

cable?

Is Gas Pipe Valve open?

(Low Pressure is too low)

Check if Refrigerant is leaking.

(Recharge Refrigerant)

Check if Strainer is clogged.

(PARTS INFORMATION 3)

Abnormal noise

Defective Compressor

can be considered.

(due to inside dirt clogging

or broken compone

nt)

Check if vibration noise by

loose bolt or contact noise

of piping is happening.

02-68

2-5 SERVICE PARTS INFORMATION

PSI

SERVICE PARTS INFORMATION 2

Compressor

Check Point 1 : Check connection

Check Point 2 : Check winding resistance

Check Point 3 : Replace Inverter PCB

Check terminal connection of Compressor

(Loose or incorrect wiring)

Check winding resistance of each terminal

If the resistance value is 0 or infinite, replace Compressor.

If Check Point 1, 2 do not improve the symptom, replace Inverter PCB.

Resistance value : 0.344

(at 77

°F)

Check connection of Inverter PCB

(Loose or incorrect wiring)

S: WHITE

R: RED

C(T): BLACK

compressor

Inverter PCB

TM400 (RED)

TM401 (WHITE)

TM402 (BLACK)

02-69

C(T)

SERVICE PARTS INFORMATION 3

Outdoor Unit Electronic Expansion Valve (EEV1)

02-70

CN111CN112

EEV1

EEV2

Check Point 1 : Check Connections

Check connection of connector (CN111)

(Loose connector or open cable)

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

If Resistance value is abnormal, replace EEV.

Read wire

± 4

Resistance value (68°F)

Check Point 3 : Check Voltage from Controller PCB

Remove Connector and check Voltage (DC12V).

If it does not appear, replace Controller PCB.

White - Red

Orange - Red

Yellow - Red

Blue - Red

Check Point 5 : Check Opening and Closing Operation of Valve

When Valve is closed,

it has a temp. difference between Inlet and Outlet.

Pipe (In) Pipe (Out)Pipe (In) Pipe (Out)

Check Point 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in (1), but if there is a difference

as shown in (2), there is a possibility of inside clogged. In this case, replace Strainer.

(1) (2)

If it is open,

it has no temp. difference between Inlet and Outlet.

Pipe (In)

Pipe (Out)

Hi TEMP.

Normal TEMP.

Example : Hot GUS

Pipe (In)

Pipe (Out)

Hi TEMP.

OPEN

Example : Hot GUS

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

>> If an abnormal noise does not show, replace Controller PCB.

SERVICE PARTS INFORMATION 4

Outdoor Unit Electronic Expansion Valve (EEV2)

02-71

CN111CN112

EEV1

EEV2

Check Point 1 : Check Connections

Check connection of connector (CN112)

(Loose connector or open cable)

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

If Resistance value is abnormal, replace EEV.

Read wire

± 4

Resistance value (68°F)

Check Point 3 : Check Voltage from Controller PCB

Remove Connector and check Voltage (DC12V).

If it does not appear, replace Controller PCB.

White - Red

Orange - Red

Yellow - Red

Blue - Red

Check Point 5 : Check Opening and Closing Operation of Valve

When Valve is closed,

it has a temp. difference between Inlet and Outlet.

Pipe (In) Pipe (Out)Pipe (In) Pipe (Out)

Check Point 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in (1), but if there is a difference

as shown in (2), there is a possibility of inside clogged. In this case, replace Strainer.

(1) (2)

If it is open,

it has no temp. difference between Inlet and Outlet.

Pipe (In)

Pipe (Out)

Hi TEMP.

Normal TEMP.

Example : Hot GUS

Pipe (In)

Pipe (Out)

Hi TEMP.

OPEN

Example : Hot GUS

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

>> If an abnormal noise does not show, replace Controller PCB.

SERVICE PARTS INFORMATION 5

Thermistor

02-72

Check Point : Check Thermistor resistance value

Remove connector and check Thermistor resistance value.

Temperature

[°F]

Resistance Value [ k ]

Thermistor A Thermistor B Thermistor C Thermistor D

- 4

104

122

140

158

176

194

212

230

248

---

168.6

129.8

100.9

79.1

62.6

49.8

40.0

26.3

17.8

12.3

8.7

6.3

4.6

3.4

2.6

2.0

---

27.8

21.0

16.1

12.4

9.6

7.6

6.0

4.8

3.8

2.5

1.7

1.2

---

105.4

58.2

44.0

33.6

25.9

20.2

15.8

12.5

10.0

8.0

5.3

3.6

---

27.4

20.7

15.8

12.2

9.5

7.5

5.9

4.7

3.8

2.5

1.7

1.2

0.8

0.6

0.4

0.3

---

Applicable

Thermistors

Discharge temp. TH

Comprssor temp. TH

Outdoor temp. TH Heat sink temp. THHeat exchanger. TH

Suction temp. TH

Sub-cool heat exchanger

LP gas (inlet) TH

Sub-cool heat exchanger

LP gas (outlet) TH

Sub-cool heat exchanger

HP liquid (outlet) TH

SERVICE PARTS INFORMATION 6

Discharge Pressure Sensor

Suction Pressure Sensor

Check Point : Check Voltage from Main PCB

With the connector connected to the PCB, measure the voltage between CN91:3-4

of the Main PCB.

1. Discharge Pressure Sensor

Characteristics of pressure sensor

4.5

735

0.5

Output [DCV]

Pressure [PSI]

Check Point : Check Voltage from Main PCB

With the connector connected to the PCB, measure the voltage between CN92:2-3

of the Main PCB.

2. Suction Pressure Sensor

Characteristics of pressure sensor

3.5

250

0.5

Output [DCV]

Pressure [PSI]

02-73

WHITE

PRESSURE

SENSOR

(HIGH)

BLACK

RED

WHITE

PRESSURE

SENSOR

(LOW)

BLACK

RED

CN91

368

2.5

CN92

125

2.0

SERVICE PARTS INFORMATION 7

Outdoor Fan Motor

02-74

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off.

(Check if fan is caught, dropped off or locked motor)

>>If Fan or Bearing is abnormal, replace it.

Check Point 2 : Check resistance of Outdoor fan motor

Refer to below. Circuit-test "Vm" and "GND" terminal.

(Vm: DC voltage, GND: Earth terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

Pin number

(wire color)

Terminal function

(symbol)

1 (Red)

4 (Black)

5 (White)

6 (Yellow)

7 (Brown)

DC voltage (Vm)

No function

Earth terminal (GND)

Control voltage (Vcc)

Speed comand (Vsp)

Feed back (FG)

SERVICE PARTS INFORMATION 8

Active Filter Module

02-75

Check Point 1 : Check Open or Short-circuit and Diode

Check Point 2 : Check the Output DC voltage (between P and N)

(+IN)

( IN)

Check the Output DC voltage (between P and N) of compressor stopping and operating.

If it is abnormal,replace ACTIVE FILTER MODULE

Remove connector, check the open or short-circuit and the diode in the module

>> If the output voltage of compressor operating is less than the output voltage of compressor stopping,

Active Filter Module is detective. >> Replace Active Filter Module

Terminal

Resistance value

L1,L2

Control Box

(+IN)

( IN)

Tester(+) Tester(-)

Check the open or short-circuit

Check the diode

360k

900k

1.69M /

20%

540k

20%

(Ref. value 1)

1.23M

(Ref. value 2)

2.03M /

(Ref. value 1)

4.83M

(Ref. value 2)

Terminal

Resistance value

Tester(+) Tester(-)

1.12M /

(Ref. value 1)

504k

(Ref. value 2)

2.23M /

(Ref. value 1)

503k

(Ref. value 2)

Ref. value 1

Specifications for Multimeter

Manufacturer : FLUKE

Model name : FLUKE11

Power source : DC9V.

Ref. value 2

Specifications for Multimeter

Manufacturer : Sanwa

Model name : PM3

Power source : DC3V.

SERVICE PARTSSERVICE PARTS INFORMATION 3INFORMATION 10

Diode Bridge (on the Inverter PCB)

Check Point 1: Check OPEN / SHORT of Diode Bridge

02-76

Remove each terminal, and check open / short of the Diode Bridge.

pin ( + )

Pin ( - )

1M greater

Pin ( + )

pin ( - )

Resistance Value

Read wire

If it is abnormal, replace Inverter PCB

(+),( - ) shows the terminal of the meter

2 3

Hybrid Flex Inverter System

3 . DISASSEMBLY PROCESS

Remove the 6 mounting screws.

03-11

16. Precautions for exchange of refrigerant-cycle-parts

EXPANSION VALVE

PRESSURE SENSOR

3WAY VALVE (GAS)

3WAY VALVE (LIQUID)

(1) During exchange the following parts shall be protected by wet rag and not make the allowable temperature or more.

(2) Remove the heat insulation when there is the heat insulation near the welding place.

Move and cool it when its detaching is difficult.

(3) Cool the parts when there are parts where heat might be transmitted besides the replacement part.

(4) Interrupt the flame with the fire-retardant board when the flame seems to hit the following parts directly.

(5) Do not allow moisture or debris to get inside refrigerant pipes during work.

(6) When brazing, be sure to replace the air in the pipe with nitrogen gas to prevent forming oxidization scale.

Part name

Allowable

temperature

Precautions in work

Remove the coil before brazing.

And install the coil after brazing.

Tighten the flare part gripping it. (Tightening torque :15 1.5N m)

Do the static electricity measures.

Remove the suction temp. sensor before brazing.

And install the suction temp. sensor after brazing.

248°F

SOLENOID VALVE

Remove the coil before brazing.

And install the coil after brazing.

248°F

4WAY VALVE

248°F

UNION JOINT

Remove the pressure sensor before brazing.

And install the pressure sensor after brazing.

212°F

PRESSURE SWITCH

212°F

WIRING MANUAL

P/N 9380230007-02

APPLICABLE MODEL㧦

AOU48RLXFZ

AO*G45LAT8

ROG45LAT8

HOG45LAT8

Bind all wires with binders (cable ties) at the location shown in the picture of this manual.

PARTS LIST

⃸The following list is the necessary quantity of Binders (cable ties) for each service parts replacement.

small size (80mm) middle size (150mm)

large size (200mm)

THERMISTOR ASSY A(SERVICE)

9380229001

THERMISTOR ASSEMBLY

9900599003

THERMISTOR(HEX) ASSY(SERVICE)

9380229032

HEAT EXCHANGER THERMISTOR

9900600006

THERMISTOR(OUT) ASSY(SERVICE)

9380229049

THERMISTOR(OUTDOOR TEMP)

9900210052

SENSOR ASSY A(SERVICE)

9380229056

SENSOR

9900505059

SENSOR ASSY B(SERVICE)

9380229063

SENSOR

9900505066

f-1

SOLENOID ASSY A(SERVICE)

9380229094

SOLENOID

9970109010

f-2

SOLENOID ASSY C(SERVICE)

9380229131

SOLENOID

9900189228

SOLENOID ASSY B(SERVICE)

9380229100

SOLENOID

9970055072

h-1

HTR(CRANK) ASSY(SERVICE)

9380229117

HEATER(CRANK CASE)

9900132088

h-2

BELT HEATER ASSY(SERVICE)

9380229124

BELT HEATER

9361140301

THERMISTOR ASSY B(SERVICE)

9380229018

THERMISTOR ASSEMBLY

9900599010

THERMISTOR ASSY C(SERVICE)

9380229025

THERMISTOR ASSEMBLY

9900598006

COIL(EXP VLV)ASSY A(SERVICE)

9380229070

COIL(EXPANSION VALVE)

9970098031

COIL(EXP VLV)ASSY B(SERVICE)

9380229087

COIL(EXPANSION VALVE)

9970096068

⃸f-1≝SOLENOID ASSY A is applied only to the following models; ⃸h-1≝HTR(CRANK) ASSY is applied only to the following model;

[AOU48RLXFZ]/[AOBG45LAT8] [AOU48RLXFZ]

⃸f-2≝SOLENOID ASSY C is applied only to the following models; ⃸h-2≝BELT HEATER ASSY is applied only to the following models;

[AOYG45LAT8]/ [AOHG45LAT8]/[ROG45LAT8]/[HOG45LAT8] [AOYG45LAT8]/ [AOHG45LAT8]/ [AOBG45LAT8]

/[ROG45LAT8]/[HOG45LAT8]

CHANGE BINDER LIST

When changing parts, the following Binder Numbers shown in the picture must be replaced at the same location.

small size middle size large size

THERMISTOR ASSY A(SERVICE)

9380229001

4,6,7

5,10,12,13,14,15,18

THERMISTOR(HEX) ASSY(SERVICE)

9380229032

3,10,12,13,14,15,18

THERMISTOR(OUT) ASSY(SERVICE)

9380229049

1,2

10,12,13,14,15,18

SENSOR ASSY A(SERVICE)

9380229056

10,12,13,14,16,18

SENSOR ASSY B(SERVICE)

9380229063

10,12,13,14,16,18

f-1

SOLENOID ASSY A(SERVICE)

9380229094

f-2

SOLENOID ASSY C(SERVICE)

9380229131

SOLENOID ASSY B(SERVICE)

9380229100

11,17

h-1

HTR(CRANK) ASSY(SERVICE)

9380229117

h-2

BELT HEATER ASSY(SERVICE)

9380229124

THERMISTOR ASSY B(SERVICE)

9380229018

8,9

10,18,20,22,24,25

THERMISTOR ASSY C(SERVICE)

9380229025

10,18,20,22,26,27

COIL(EXP VLV)ASSY A(SERVICE)

9380229070

10,18,20,21

COIL(EXP VLV)ASSY B(SERVICE)

9380229087

10,18,20,21

WIRE(PRESSURE) SW 10,12,13,14,16,18

⃸m : WIRE(PRESSURE SW) are not service parts.

HEATER(CRANK CASE)

(2 WIRES)

CONNECTOR : RED

(2 WIRES)

SURVICE PARTS

BINDER (Q'ty)

ATTACHED WIRE Q'ty

change BINDER NO.

11,19,23

11,19

CAUTION

CONNECTOR : WHITE

OUTDOOR TEMP

TAPE COLOR : WHITE

WIRE

TAPE COLOR : RED / NO MARK

(2 WIRES 1 CONNECTOR)

WIRING

MANUAL

9380230007

MANUAL

CONNECTOR : BLUE

REMARK

If replacing a component/part, bind all wire with cable ties. Loose wires may come in contact with PCB and overheat causing electric

shock or fire.

CONNECTOR : BLUE

CONNECTOR : RED

SURVICE PARTS

WIRE

CONNECTOR : WHITE

CONNECTOR : RED

TAPE COLOR : BROWN / GRAY

(2 WIRES 1 CONNECTOR)

TAPE COLOR : BLUE / YELLOW

(2 WIRES 1 CONNECTOR)

CONNECTOR : BLUE

CONNECTOR : WHITE

03-12

370

070

260

060

020

031

260

060

040

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Ⅹ

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‒

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41).#6*1).#6

03-13

BACK VIEW ⅙APPLICABLE MODEL≝ALL MODEL

WIRE c

BIND (small size)

WIRE c

BIND (small size)

WIRE c

BIND (small size)

WIRE a

BIND (middle size)

WIRE b

BIND (small size)

WIRE a

Color:RED

BIND (middle size)

WIRE a

Color:WHITE

BIND (small size)

WIRE a

WIRE b

WIRE a

(2 WIRES

1 CONNECTOR)

We have removed the“Right panel”when taking the pictures.

03-14

FRONT VIEW ⅙APPLICABLE MODEL≝ALL MODEL

WIRE d

WIRE e

WIRE m(2 WIRES)

⅁

⅀

⅂

ℾ

ℽ

⅃

ⅅ

⅄

BIND (middle size)

WIRE d,e,m(2 WIRES)

BIND (middle size)

WIRE a(2 WIRES),b,c

ℿ

BIND (middle size)

WIRE a(2 WIRES),b,c,d,e,m(2 WIRES)

Don't slack wires.

BIND (middle size)

WIRE a(2 WIRES),b,c,d,e,i(2 WIRES),j(2 WIRES),k,l,m(2 WIRES)

BIND (middle size)

WIRE k,l

BIND (middle size)

WIRE i(2 WIRES),j(2 WIRES)

BIND (middle size)

WIRE i(2 WIRES),j(2 WIRES),k,l

̪NOT BIND WIRE g

BIND (middle size)

WIRE f-1,h-1(2 WIRES) (For AOU48RLXFZ)

WIRE f-1,h-2 (For AOBG45LAT8)

WIRE f-2,h-2 (For AOYG45LAT8,AOHG45LAT8,

ROG45LAT8,HOG45LAT8)

BIND (middle size)

WIRE g

WIRE f-1 (For AOU48RLXFZ,AOBG45LAT8)

WIRE f-2 (For AOYG45LAT8,AOHG45LAT8,

ROG45LAT8,HOG45LAT8)

Don't slack wires.

WIRE k

WIRE l

OPENED

WIRE g

⃸We have removed the⃯Right panel⃰when taking the pictures.

03-15

⅙APPLICABLE MODEL≝ALL MODEL

SIDE VIEW

WIRE j

(2 WIRES 1 CONNECTOR)

ℹ

WIRE h-1(2 WIRES) (For AOU48RLXFZ)

WIRE h-2 (For AO*G45LAT8,

ROG45LAT8,HOG45LAT8)

℺

BIND (large size)

WIRE h-1(2 WIRES) (For AOU48RLXFZ)

WIRE h-2 (For AO*G45LAT8,

ROG45LAT8,HOG45LAT8)

BIND (middle size)

WIRE h-1(2 WIRES) (For AOU48RLXFZ)

WIRE h-2 (For AO*G45LAT8,

ROG45LAT8,HOG45LAT8)

Color:BROWN

Color:BLUE

BIND (small size)

WIRE i

SIDE VIEW

Color:GRAY

WIRE i

(2 WIRES 1 CONNECTOR)

BIND (middle size)

WIRE j with insulation

BIND (middle size)

WIRE i with insulation

BIND (small size)

WIRE i

Color:YELLOW

⃸We have removed the⃯Right panel⃰when taking the pictures.

03-16

5-1/8in

4-11/32in

2-3/8in

1-9/16in

25/32in

5-29/32in

0.4in

(1-1/2in)

23-5/8in

SLIT

(Gap: 0 3/64in)

Gap: 0 3/64in

5/64in

248°F

212°F