Fujitsu AGU15RLF, ASU12RLF1, AGU12RLF, ASU24RLF, AUU7RLF Service Instructions Manual

...

Download

SPLIT TYPE ROOM AIR CONDITIONER

Compact Wall Mounted Wall Mounted / Floor Compact Cassette / Slim Duct

INVERTER MULTI

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

R410A

ASU7RLF1 ASU9RLF1 ASU12RLF1

ASU18RLF ASU24RLF

AGU9RLF AGU12RLF AGU15RLF

AUU7RLF AUU9RLF AUU12RLF AUU18RLF

ARU7RLF ARU9RLF ARU12RLF ARU18RLF

ARU24RLF

AOU36RLXFZH AOU45RLXFZ

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

1. CAPACITY CONTROL................................................................................................

2. AUTO CHANGEOVER OPERATION..........................................................................

3. INDOOR FAN CONTROL...........................................................................................

4. LOUVER CONTROL...................................................................................................

5. OUTDOOR FAN CONTROL.......................................................................................

6. COMPRESSOR CONTROL.......................................................................................

7. TIMER OPERATION CONTROL................................................................................

8. ELECTRONIC EXPANSION VALVE CONTROL........................................................

9. TEST OPERATION CONTROL..................................................................................

10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )................................

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

12. AUTO RESTART........................................................................................................

13. MANUAL AUTO OPERATION...................................................................................

14. COMPRESSOR PREHEATING..................................................................................

15. POWERFUL OPERATION ( FOR ASU*RLF1 / AGU*RLF type )................................

16. MINIMUM HEAT OPERATION...................................................................................

17. ECONOMY OPERATION...........................................................................................

18. HEAT INSULATION CONDITION ( BUILDING INSULATION )..................................

19. THERMO CONTROL ( FOR INDOOR UNIT SENSOR )............................................

01-01 01-01 01-03 01-11 01-15 01-15 01-16 01-19 01-19 01-19 01-19 01-20 01-20 01-21 01-21 01-21 01-21 01-22 01-22

20. THERMO CONTROL ( FOR WIREDE REMOTE SENSOR ).....................................

21. BASE HEATER OPERATION ( FOR AOU36RLXFZH ).............................................

22. FRESH AIR CONTROL ( FOR AU type )....................................................................

23. EXTERNAL ELECTRICAL HEATER CONTROL ( FOR AR type ).............................

24. DRAIN PUMP OPERATION ( For AU / AR type ).......................................................

25. AIR OUTLET SELECTION ( DAMPER CONTROL ) ( FOR AG type )........................

26. DEFROST OPERATION CONTROL..........................................................................

27. CHECK RUN OPERATION ( AUTOMATIC WIRING CORRECTION )......................

28. VARIOUS PROTECTIONS.........................................................................................

29. PUMP DOWN OPERATION.......................................................................................

30. TEST RUN ( OUTDOOR UNIT ).................................................................................

2. TROUBLE SHOOTING

2-1 ERROR DISPLAY......................................................................................................

2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY....................

2-1-2 SIMPLE REMOTE CONTROLLER DISPLAY....................................................

2-1-3 CENTRAL REMOTE CONTROLLER DISPLAY.................................................

2-1-4 OUTDOOR UNIT DISPLAY................................................................................

2-2 TROUBLE SHOOTING WITH ERROR CODE..........................................................

2-3 TROUBLE SHOOTING WITH NO ERROR CODE....................................................

2-4 SERVICE PARTS INFORMATION............................................................................

01-22 01-23 01-23 01-23 01-24

01-25 01-26 01-28 01-32 01-34 01-35

02-01 02-01

02-03 02-03 02-03 02-05 02-40

02-49

R410A

Slim Duct / Compact Cassette Compact Wall Mounted / Wall Mounted / Floor type

INVERTER (MULTI)

1 . DESCRIPTION OF EACH CONTROL OPERATION

1. CAPACITY CONTROL

Compressor frequency decides by capacity of an indoor unit, operation number of an indoor unit, set temperature, room temperature and outside temperature.

2. 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 86°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>

( Table 1 : Operation mode selection table )

Room temperature (TR)

TR> Ts+4°F(+2°C)

Operation mode

Cooling

(Autmatic dry)

TR : Room temperature Ts : Setting temperature

Ts+4°F(+2°C) TR Ts -4°F(-2°C)

TR < Ts -4°F(-2°C) Heating

*Middle zone

*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.

( Fig. 1 : Outdoor temperature zone selection )

Cooling mode

77°F (25°C)

Heating mode

When Heating was selected at ձ, the same operation as HEATING OPERATION of page 01-08 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.

01-01

AUTO CHANGEOVER operation flow chart

START

Ts : Setting temperature

HEATING OPERATION

YES

Thermostat remains

in OFF state for 6 minutes or

longer?

YES

Room temp.

Ts+4°F(+2°C)?

Room temp.

Ts -4°F(-2°C)?

Middle zone

Operation mode

of outdoor unit : Cooling or Dry?

Operation mode

of outdoor unit : Heating?

YES

COOLING (AUTO:DRY)

OPERATION

Thermostat remains

in OFF state for 6 minutes or

longer?

YES

System stops

or operation command other than

auto changeover operation?

YES

Outdoor temp.

77°F(25°C)?

01-02

System stops

or operation command other than

auto changeover operation?

YES

3. INDOOR FAN CONTROL

1. Fan speed

( Table 2 : Indoor fan speed table )

ASU7RLF1

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo Auto

(rpm)

Fan Speed

1090 1050 1000

950 850 710 600

480 1090 1050

950

850

680

600

480

X, J zone : 680

ASU9RLF1 (rpm)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo Auto

Fan Speed

1140 1090 1040

980 850 710 600

480 1140 1090

980

850

680

600

480

X, J zone : 680

ASU12RLF1

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Poweful

Me+

Quiet

Cool Air Prevention

S-Lo

Poweful

Quiet

*Soft Quiet

S-Lo Auto

X, J zone : 680

(rpm)

Fan Speed

1240 1190 1120 1050

910 710 600

480 1240 1190 1050

880

680

600

480

*Note, during Economy operation and operation mode is Fan,airflowis 1stepdowns. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-03

ASU18RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm)

Fan Speed

1260 1120 1020

900 790 680

480 1260 1020

900

770

680

480

X, J zone : 770

ASU24RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo Auto

X, J zone : 900

(rpm)

Fan Speed

1430 1320 1220 1020

900

720

480 1480 1220 1020

900

720

480

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-04

AGU9RLF

Operation mode Air flow mode

Heating

Cooling/ Fan

Dry

Powerful

Quiet

Cool air prevention

S-Lo

Powerful

Quiet

*Soft Quiet

S-Lo Auto

(Upper/ Lower)

Speed

Upper & Lower

air flow mode

1230/ 1040 1120/ 950 1000/ 850

860/ 730 660/ 560 660/ 560

660/ 560 1230/ 1040 1120/ 950

960/ 820 820/ 700 660/ 560 570/ 480 660/ 560

---- / ----

(rpm)

Upper air flow mode

1300 1230 1090

940 750 680

680 1300 1230 1070

910

750

680

X, J zone : 750

AGU12RLF

Operation mode Air flow mode

Heating

Cooling/ Fan

Dry

Powerful

Quiet

Cool air prevention

S-Lo

Powerful

Quiet

*Soft Quiet

S-Lo Auto

AGU15RLF

Operation mode Air flow mode

Heating

Cooling/ Fan

Dry

Powerful

Quiet

Cool air prevention

S-Lo

Powerful

Quiet

*Soft Quiet

S-Lo Auto

(Upper/ Lower)

Speed

Upper & Lower

air flow mode

1350/ 1150 1240/ 1040 1080/ 920

910/ 770 660/ 560 660/ 560

660/ 560 1350/ 1150 1240/ 1040 1050/ 890

860/ 730 660/ 560 570/ 480 660/ 560

---- / ----

Speed

Upper & Lower

air flow mode

1440/ 1230 1330/ 1120 1140/ 970

940/ 800

660/ 560

660/ 560 1440/ 1230 1330/ 1120 1100/ 930

890/ 750 660/ 560 570/ 480 660/ 560

---- / ----

(rpm)

Upper air flow mode

1370 1300 1140

980 750 680

680 1370 1300 1120

930

750

680

X, J zone : 750

(rpm)

Upper air flow mode

1440 1370 1180

1020

750

680

680 1440 1370 1160

960

750

680

X, J zone : 750

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-05

AUU7RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm)

Fan Speed

590 570 540 490 440 400 300 590 540 490 440 400

300

X, J zone : 440

AUU9RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm)

Fan Speed

590 570 540 490 440 400 300 590 540 490 440 400

300

X, J zone : 440

AUU12RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

X, J zone : 460

(rpm)

Fan Speed

650 620 580 520 460 400 300 660 580 520 460 400

300

AUU18RLF

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Me+

Quiet

Cool Air Prevention

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

(rpm)

Fan Speed

840 800

750 650 500 400 300 790 660 570 460 400

300

X, J zone : 460

01-06

ARU7RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm)

Fan Speed

1160 1000

940 880

500 1160 1000

940

880

500

X, J zone : 880

ARU9RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm)

Fan Speed

1260 1160 1060

960

500 1260 1160 1060

960

500

X, J zone : 960

ARU12RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Lo Quiet S-Lo

Lo Quiet

*Soft Quiet

S-Lo

Auto

ARU24RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Quiet

S-Lo

Quiet

*Soft Quiet

S-Lo

Auto

(rpm) (rpm)

Fan Speed

1340 1240 1140 1030

500 1340 1240 1140 1030

500

X, J zone :1030

(rpm)

Fan Speed

1460 1360 1260 1180

600 1460 1360 1260 1180

600

X, J zone :1180

ARU18RLF (Static pressure:25Pa)

Operation mode

Heating

Cooling / Fan

Dry

Air flow mode

Hi Me Lo

Quiet

S-Lo

Hi Me Lo

Quiet

*Soft Quiet

S-Lo 600

Auto

Fan Speed

1380 1300 1220 1140

600 1380 1300 1220 1140

600

X, J zone :1140

*Note, during Economy operation and operation mode is Fan, air flow is 1 step downs. (Hi > Me, Me > Lo, Quiet > Soft Quiet)

01-07

2. FAN OPERATION

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.< All models >

3. COOLING OPERATION (Auto : Cooling)

Switch the airflow [Auto], and the indoor fan will run according to a room temperature, as shown in Fig. 2 . 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. 2 : Airflow change - over )

< All models >

When the room temperature rises

TR-Ts > +5

(+2.5°C)

(+1.5°C)

°F

(+2.5°C)

°F > TR-Ts > +3°F

°F > TR-Ts

(+1.5°C)

TR : Room temperature Ts : Setting temperature

TR-Ts > +4°F

°F > TR-Ts > +2°F

(+2°C)

°F > TR-Ts

(+1°C)

When the room temperature drops

(+2°C)

(+1°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. 3 . Room temperature variation which the room temperature sensor of the indoor unit body has detected.

( Fig. 3 : Indoor fan control )

< All models >

< Compressor >

OFF

< Indoor fan air flow mode >

Setting air flow

S-Lo

Fan OFF

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

01-08

5. HEATING OPERATION (Auto : Heating)

Switch the airflow [Auto], and the indoor fan will run according to a room temperature, as shown in Fig. 4 . 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 .

( Fig. 4 : Airflow change - over )

< ASU type >

When the room temperature drops

TR-Ts > -3°F

-3

(-1.5°C)

-5

(-2.5°C)

When the room temperature drops

TR-Ts > -3°F

-3

(-1.5°C)

(-2.5°C)

(-1.5°C)

°F > TR-Ts > -5°F

(-2.5°C)

°F > TR-Ts

(-1.5°C)

°F > TR-Ts > -5°F

-5

°F > TR-Ts

(-2.5°C)

TR-Ts > -2

°F > TR-Ts > -4°F

-2

(-1°C) (-2°C)

°F > TR-Ts

-4

(-1°C)

°F

(-2°C)

(-1°C)

(-2°C)

°F

TR-Ts > -2

°F > TR-Ts > -4°F

-2

(-1°C)

°F > TR-Ts

-4

(-2°C)

When the room temperature rises

Me+

< AGU/ AUU/ ARU type >

When the room temperature rises

TR : Room temperature Ts : Setting temperature

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

The maximum value of the indoor fan speed is set as shown in Fig. 5 , based on the detected temperature by the indoor heat exchanger sensor in heating mode. Field setting is necessary at AU and AR type as "Cool air prevention : effective"

( Fig. 5 : Airflow change - over for cool air prevention )

During NORMAL HEATING OPERATION

< ASU type >

When Indoor heat exchanger temperature rises

107.6°F (42°C)

102.2

(39°C)

98.6 (37°C)

(30°C)

°F °F °F

*Me+ or setting

FAN mode

*Lo or setting

FAN mode

Cool air prevention

S-Lo

*Lower speed is selected

When Indoor heat exchanger temperature drops

98.6 (37°C)

93.2 (34°C)

89.6 (32°C)

82.4 (28°C)

°F °F °F °F

When Indoor heat exchanger temperature rises

107.6°F (42°C)

102.2°F (39°C)

98.6°F (37°C)

86.0°F (30°C)

< AGU type >

When Indoor heat exchanger temperature drops

*Me or setting

FAN mode

*Lo or setting

FAN mode

Cool air prevention

S-Lo

*Lower speed is selected

93.2°F (34°C)

87.8°F (31°C)

84.2°F (29°C)

75.2°F (24°C)

01-09

< AUU type >

< ARU type >

When Indoor heat exchanger temperature rises

107.6°F (42°C)

102.2°F

(39°C)

98.6°F

(37°C)

86.0°F

(30°C)

*Me+ or setting

FAN mode

*Lo or setting

FAN mode

When Indoor heat exchanger temperature drops

Cool air prevention

S-Lo

98.6°F (37°C)

93.2°F (34°C)

89.6°F (32°C)

75.2°F (24°C)

*Lower speed is selected

During MININIMUM HEAT OPERATION

< ASU / AUU type >

When Indoor heat exchanger temperature rises

102.2°F (39°C)

When Indoor heat exchanger temperature drops

Auto

93.2°F (34°C)

When Indoor heat exchanger temperature rises

*Hi or setting

98.6°F (37°C)

84.2°F

(29°C)

FAN mode

*Lo or setting

FAN mode

S-Lo

*Lower speed is selected

< AGU type >

When Indoor heat exchanger temperature rises

102.2°F (39°C)

Auto

When Indoor heat exchanger temperature drops

89.6

°F

(32°C)

75.2

°F

(24°C)

When Indoor heat exchanger temperature drops

87.8°F (31°C)

< ARU type >

When Indoor heat exchanger temperature rises

98.6°F (37°C)

Auto

When Indoor heat exchanger temperature drops

89.6°F (32°C)

01-10

4. LOUVER CONTROL

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

1. VERTICAL LOUVER CONTROL

(Function Range)

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

( Fig. 6 : Vertical air direction range )

Use the air direction adjustments within the ranges shown above. The Remote Controller's display does not change.

If you set the angle to position DRY mode, they automatically return to position In COOL or DRY mode, if the angle is set to position

մ㹼շ for more than 30 minutes in COOL or

ճ.

մ㹼շ for many hours,

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

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

During AUTO or Heating mode operation, for the first a few minutes after beginning operation, air flow will be horizontal The air flow direction setting will temporarily become

ձ ; the air direction cannot be adjusted during this period.

ձ when the temperature of the air flow is

low at the start of the Heating mode.

2. SWING OPERATION

To select Vertical Airflow Swing Operation

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

( Table 3 : Swinging range )

The type of operation

Cooling / Dry / Fan mode

Heating / Fan mode

Range

մճշ

The SWING operation may stop temporarily when the air conditioner’s fan is not operating, or when operating at very low speeds.

To select Horizontal Airflow Swing Operation

(No function)

01-11

For Wall Mounted Type < ASU18/ 24RLF >

1. VERTICAL LOUVER CONTROL

( Fig. 7 : Vertical air direction range )

(Function Range)

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

ձղճմյն

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 ձ

ձ ղ

ճ մ յ ն

Heating mode : Downward flow յ

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 ձ 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 ( մ㹼ն ) 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 20 minutes, they will automatically return to position ճ.

2. HORIZONTAL LOUVER CONTROL

(Function Range)

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

ձ ղ ճմյ

( Fig. 8 : Horizontal air direction range )

3. SWING OPERATION

Vertical Airflow Swing Operation

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

( Table 4 : Swinging range )

The type of operation

Cooling / Dry / Fan mode ( ձ㹼ճ )

Heating / Fan mode ( մ㹼շ )

Range

ճն

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.

Horizontal Airflow Swing Operation

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

( Table 5 : Swinging range )

RangeThe type of operation

Cooling / Dry / Heating / Fan mode

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.

Vertical and Horizontal Airflow Swing Operation

When the horizontal swing signal is input from remote control, the combination of the vertical and horizontal swing operation is performed.

Horizontal Louver

ճմ

Power Diffuser doesn't swing in any swing operation.

01-12

For Floor Type < AGU9/ 12/ 15RLF >

1. VERTICAL LOUVER CONTROL

(Function Range)

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

The Remote Controller's display does not change.

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.

( Fig. 9 : Air direction range )

Cooling / Dry / Fan mode Heating mode

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

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

䐟

, and it cannot be adjusted.

Horizontal flow Downward flow

䐟㻌

to prevent cold air being blown onto the body.

2. ADJUST THE RIGHT-LEFT LOUVERS

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

( Fig. 10 : Air direction range )

3. SWING OPERATION

To select Vertical Airflow Swing Operation

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

( Table 6 : Swinging range )

Cooling / Dry / Heating / Fan mode

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.

To select Horizontal Airflow Swing Operation

(No function)

RangeThe type of operation

01-13

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

1. VERTICAL LOUVER CONTROL

(Function Range)

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

( Fig. 11 : Vertical air direction range )

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 ձ

Heating mode : Downward flow մ

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

the air direction cannot be adjusted during this period.

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.

( Table 7 : Swinging range )

RangeThe type of operation

Cooling / Dry / Heating / Fan mode

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.)

01-14

5. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor

The Table 5 shows the fan speed of the outdoor unit.

( Table 8 : Fan speed of the outdoor unit )

Cooling

AOU36RLXFZH AOU45RLXFZ

7. COMPRESSOR CONTROL

6. COMPRESSOR CONTROL

1. OPERATION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as shown in the Table 9 .

( Table 9 : Compressor operation frequency range )

AOU36RLXFZH AOU45RLXFZ

2. OPERATION FREQUENCY CONTROL AT START UP

The compressor frequency soon after the start-up is controlled as shown in the Fig. 12 .

( Fig. 12 : Compressor control at Start-up )

890/ 830/ 710/ 640/ 580/ 520/ 460/ 390/ 340/ 290 rpm

Cooling Heating

Min Max Min Max

20 80 20 100 20 110

20 120

910/ 830/ 710/ 640/ 580/ 520/ 460/ 390/ 340/ 290 rpm

Heating

H rps G rps

E,F rps

C,D rps

B rps A rps

[ Frequency ]

AOU36RLXFZH AOU45RLXFZ

[ Time ]

AOU36RLXFZH AOU45RLXFZ

G ~ H H ~ I I ~ J J ~ K K ~ L L ~ M M ~ N N ~ O

60sec

KL M N OIJGH

F rps E rps D rps C rps B rps A rps

36 47

60sec 480sec 120sec 300sec 180sec 120sec 120sec

01-15

47 60

G rps H rps

8060

100

7. TIMER OPEARTION CONTROL

7-1 WIRELESS REMOTE CONTROLLER

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

( Table 10 : Timer setting )

ON TIMER / OFF TIMER PROGRAM TIMER SLEEP TIMER

1. ON / OFF 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

2. PROGRAM TIMER

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

Operation mode

Stop 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.

Operation mode

Stop mode

Set timeSet timeSet timeSet time

SLEEP timer operation cannot be combined with ON timer operation.

01-16

3. SLEEP TIMER

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.

Set temperature rises

( Ts : Set temperature )

+4°F (+2°C) +2°F (+1°C)

Stop of operation

Set

60min

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 8°F(4°C), the setting temperature is not changed and the operation stops at the time of timer setting.

Set temperature lowers

( Ts : Set temperature )

-2 F(-1 C)

-4 F(-2 C)

-6 F(-3 C)

-8 F(-4 C)

Stop of operation

Set

30min

01-17

7-2 WIRED REMOTE CONTROLLER

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

( Table 11 : Timer setting )

ON TIMER / OFF TIMER WEEKLY TIMER TEMPERATURE SET BACK TIMER

1. ON TIMER / OFF TIMER

Same to 6-1 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.

ON OFF ON OFF ON OFF

Setting day Setting day Setting day

Set time Set time

3. TEMPERATURE SET BACK TIMER

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

s can be together with other timer setting.

Thi

Set back tmp.

Normal tmp.

Set time Set time

OFF

01-18

8. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the Table 13 . The compressor frequency, the temperatures detected by the discharge temperature sensor and the outdoor temperature sensor.

( Table 12 : The pulse range of the electronic expansion valve control )

Operation mode Pulse range

AOU36RLXFZH AOU45RLXFZ

At the time of supplying the power to the outdoor unit, the initialization of the electronic expansion valve is operated (825 pulses are input to the closing direction).

Cooling /Dry mode

Heating mode

50 ~ 480 30 ~ 480

9. TEST OPERATION CONTROL

With Wireless Remote Controller ( with TEST RUN button )

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 lamp and timer lamp of the air conditioner body twinkle simultaneously. Set the test operation mode, and the compressor will continue to run regardless of whether the room temperature sensor detects. The test operation mode is released if 60 minutes have passed after setting up the test operation.

With Wireless Remote Controller ( without TEST RUN button )

Under the condition where the air conditioner runs, press the MANUAL AUTO button of the indoor unit for more than 10 seconds. During test running, the operation lamp and timer lamp of the air conditioner body twinkle simultaneously. Set the test operation mode, and the compressor will continue to run regardless of whether the room temperature sensor detects. The test operation mode is released, if 60 minutes have passed after setting up the test operation or pressing the MANUAL AUTO button of the indoor unit for more than 3 seconds.

With Wired Remote Controller ( without TEST RUN button )

Under the condition where the air conditioner stops, press the MASTER CONTROL button and the FAN CONTROL button simultaneously for 5 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. The test operation mode is released if 60 minutes have passed after setting up the test operation.

Outdoor unit TEST RAN operation It can carry out test run from the outdoor unit (Refer to 30.TEST RUN (For Outdoor unit)”)

10. PREVENT TO RESTART FOR 3 MINUTES ( 3 MINUTES ST )

The compressor won't enter operation status for 3 minutes after the compressor is stopped, even if any operation is given.

11. 4-WAY VALVE EXTENSION SELECT

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.

01-19

12. AUTO RESTART

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 13 : Operation contents memorized when the power is interrupted )

Operation mode

Set temperature

Set air flow

Thermistor detected position

Timer mode

Wireless remote controller

Wired remote controller (When Memory Backup : Disable)

Wired remote controller (When Memory Backup : Enable)

OFF Timer ON Timer WEEKLY Timer TEMPERRATURE

SET BACK Timer

: 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.

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.

( Table 14 : Manual auto operation control )

Functions OPERATION MODE

SETTING TEMP. FAN MODE VERTICAL LOUVER HORIZONTAL LOUVER TIMER MODE SWING OPERATION ECONOMY

All models Auto changeover 76°F(24°C)

Auto NORMAL NORMAL

Continuous

(No timer setting available)

OFF OFF

01-20

14. COMPRESSOR PREHEATING

When the outdoor temperature is lower than 28.4°F(-2°C) and the all operation mode has been stopped for 30 minutes, power is applied to the compressor and the compressor is heated.

(By heating the compressor, warm air is quickly discharged when operation is started.) When operation was started and when the outdoor temperature rises to 25°C or greater,

preheating is ended.

( Fig.13 : Compressor preheating )

OFF

32°F(0°C)

28.4°F(-2°C) ON

15. POWERFUL OPERATION ( For 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 15 .

( Table 15 : Powerful operation)

COMPRESSOR FREQUENCY Maximum FAN CONT. MODE Powerful

SETTING LOUVER

Cooling/ Dry : 3, Heating : 6 for ASU*RLF1 Cooling/ Dry : 4, Heating : 5 for AGU*RLF

Release Condition is as follows. [Cooling / Dry]

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

[Heating]

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

16. MINIMUM HEAT OPERATION

MINIMUM HEAT operation performs as below when pressing MIN. HEAT button or Weekly timer setting on the remote controller.

( Table 16 : Minimum heat operation )

Mode Heating Settingtemperature 50°F(10°C) Fanmode Auto LEDdisplay Economy Defrost operation Operate as normal

17. ECONOMY OPERATION

The ECONOMY operation functions by pressing ECONOMY button on the remote controller. At the maximum output, ECONOMY Operation is approximately 70% of normal air conditioner operation for cooling and heating. The ECONOMY operation is almost the same operation as below settings.

( Table 17 : Economy operation )

Target temperature Setting temp.+2°F(+1°C) Setting temp.-2°F(-1°C)

gnitaeHyrD /gnilooCedoM

01-21

. HEAT INSULATION CONDITION ( BUILDING INSULATION )

This setting can make the room temperature control more suitable for homes or buildings with high insulation (Function Number 95).

When the thermo sensor is turned ON it controls the compressor frequency at initial start to prevent overshoot in heating or cooling.

. THERMO CONTROL ( FOR INDOOR UNIT SENSOR )

When room temperature is controlled by the Indoor unit sensor, compressor operation is as shown in Fig. 14 and 15. But, adjustment is possible by the room temperature correction function setting. (Function Number 30 or 31)

( Fig. 14 : For Cooling operation )

Compressor ON

Ts - 1°F

(Ts - 0.5°C)

Ts : Setting temperature

. THERMO CONTROL ( FOR WIRED REMOTE SENSOR )

Compressor OFF

Ts + 1°F

(Ts + 0.5°C)

( Fig. 15 : For Heating operation )

Compressor OFF

Ts + 1°F



(Ts + 0.5°C)

Compressor ON

When room temperature is controlled by the Wired remote sensor, compressor operation is as shown in Fig. 16 and 17. But, adjustment is possible by the room temperature correction function setting. (Function Number 92 or 93)

( Fig. 16 : For Cooling operation ) ( Fig. 17 : For Heating operation )

Compressor ON

Compressor OFF

Ts - 1°F

(Ts - 0.5°C)

Ts- 1°F

(Ts - 0.5°C)

Ts : Setting temperature

Compressor OFF

Ts+ 1°F

(Ts + 0.5°C)

Compressor ON

01-22

21.BASE HEATER OPERATION ( For AOU36RLXFZH )

The base heater is operated as shown in Fig. 18 .

( Fig. 18 : Base heater control )

When outdoor temperature drops

36°F

(2°C)

When the compressor stops, Base heater is OFF. When the outdoor fan motor stops, Base heater is OFF. In the cooling mode, Base heater is OFF. In the defrost operation, Base heater maintains the same status as before the compressor stops.

When outdoor temperature rises

OFF

41°F

(5°C)

22. FRESH AIR CONTROL ( For AU type )

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as shown in Fig. 19 .

( Fig. 19 : Fresh air control )

Fan motor (Indoor unit)

Fan motor (for Fresh Air)

Operation Stop

*It needs the external relay and power supply.

23. EXTERNAL ELECTRICAL HEATER CONTROL ( For AR type )

The External Electrical Heater is operated as below.

< Heater : O

When all of the following conditions are met, external elecrtical heater will operate according to Fig. 20 .

< Heater : OFF condition >

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

2). When Defrost operation or Oil recovery operation starts

N condition >

( Table 18 : External electrical heater control )

System type Operation mode Compressor Indoor fan

Heatpump Heating ON ON (S-Lo is excluded)

( Fig. 20 : External electrical heater control )

When the room temperature drops

Ts -6°F(3°C)

Ts -22°F(12°C)

Heater : OFF

Heater : ON

Heater : OFF

When the room temperature rises

Ts : Setting temperature

Ts -2°F(1°C)

Ts -18°F(10°C)

01-23

24. DRAIN PUMP OPERATION ( For AU / AR type )

During Cooling / Dry mode

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 functi

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)

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

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. ( Fig. 21 : Detail of drain pump operation in Cooling / Dry )

Compressor

Drain Pump

ON OFF

3 minutes

ons:

Less than 3 minutes

Float Switch

Compressor

Indoor Fan

Drain Pump

ON OFF

3 minutes ST

ON OFF

3 minutes

During HEATING / FAN mode / Stop 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. )

( Fig. 22 : Detail of drain pump operation in Heating )

Float Switch

Drain Pump

ON OFF

3 minutes

01-24

25. AIR OUTLET SELECTION ( DAMPER CONTROL )( For AG type )

With this function , air come out simultaneously from the upper and lower air outlets so that the room can be cooled or heated effectively. This function is set using the switch behind the front grille of the Indoor unit. (This function is available in cooling and heating operation.)

1. How to set to blow out air from the upper and lower air outlets

Set the air outlet selection switch to

Air blows out automatically from the upper and lower air outlets as shown in Table 19 below. NOTE: Set the air outlet selection switch to the end.

Otherwise, air outlet cannot be selected as intended.

2. Description of operation

( Table 19 : Damper control )

Operation COOLING Mode DRY Mode HEATING Mode

Air flow

Conditions

Upper and lower air flow

Room temperature and set temperature are different.

Upper air flow Upper air flow

only

Room temperature is close to set temperature,*1 or the air conditioner has operated for 1hour.

Upper and lower air flow

Air flow temperature is high.

*1 : In Cooling mode *2 : In Heating mode

When the room temperature drops

TR-Ts > 4°F

(2°C)

TR-Ts < 4°F

(2°C)

TR : Room temperature Ts : Setting temperature

Upper & Lower air flow

Upper air flow

When the room temperature rises

TR-Ts >14°F

TR-Ts < 14°F

(7°C)

When the room temperature drops

84.2°F (29°C)

Upper & Lower air flow

Upper air flow

Air flow temperature is low.*2 (During defrosting operation, start of operation, etc.)

When the room temperature rises

98.6°F (37°C)

3. How to set to blow out air from the upper air outlet only

Set the air outlet selection switch to

01-25

26. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 20, 21, 22 .

1-1 NORMAL DEFROST

( Table 20 : Condition of starting defrost operation )

Normal defrost

: Outdoor heat exchanger temp.

: Outside air temp. : Before 5 minutes detected Tn

Tn-1

Less than 35 minutes

Does not operate

Sn Sn-1

Compressor integrating operation time

More than 35minutes

Tn < 1.4°F(-17°C)

(at Ta > 14°F(-10°C) Tn < 0.8 ×Ta - 11.6

(at 4°F(-20°C) < Ta < 14°F(-10°C))

Tn < 0.8 ×Ta - 11.6

(at Ta < 4°F(-20°C))

Tn - Tn-1 < 28.4°F(-2°C) and Sn = Sn-1 (Tn < 21.2°F(-6°C))

: Number of operation indoor units

: Before 5 minutes detected Sn

or Tn < -18.4°F(-28°C)

1-2. INTEGRATING DEFROST

( Table 21 : Condition of integrating defrost operation )

Integrating defrost

( OFF count defrost )

Tn < 26.6°F(-3°C)

(and after 30 minutes, if the Tn < 26.6°F(-3°C)

Compressor integrating operation time

More than 210 minutes

( For continuous operation )

Tn < 23°F(-5°C)

(and after 3 minutes, if the Tn < 23°F(-5°C)

1-3. INTEGRATING ( OFF COUNT ) DEFROST

( Table 22 : Condition of integrating ( OFF count ) defrost operation )

Integrating defrost

If the compressor continuous operation time is less than 10 minutes, the OFF number of the compressor is counted. If any defrost operated, the compressor OFF count is cleared.

Compressor integrating operation time

Less than 10 minutes

( For intermittent operation )

OFF count of the compressor 40 times

( at outside air temp. < 35.6°F(2°C))

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 23 .

( Table 23 : Defrost release condition )

Outdoor heat exchanger temperature sensor value is higher than 59°F(15°C) or Compressor operation time has passed 15 minutes.

Release Condition

01-26

3. Defrost Flow Chart

The defrosting shall proceed by the integrating operation time, outdoor temperature and outdoor heat exchanger temperature as follows.

Heating operation start : Compressor ON

Ta > 14°F(-10°C)

Tn < 1.4°F(-17°C)

: Outdoor heat exchanger temp.

: Outside air temp. : Before 5 minutes detected Tn

Tn-1

: Number of operation indoor units

: Before 5 minutes detected Sn

Sn-1

4°F(-20°C) < Ta < 14°F(-10°C)

Tn < 0.8 ×Ta - 11.6

Tn < -18.4°F(-28°C)

Normal defrost Integrating defrost Integrating defrost

or or

Ta < 4°F(-20°C)

Tn < 0.8 ×Ta - 11.6

Tn < -18.4°F(-28°C)

Tn < 21.2°F(-6°C) More than 210 minutes

Tn - Tn-1 < 28.4°F(-2°C) and Sn = Sn-1

( For continuous operation )

Tn < 26.6°F(-3°C) (and after 30 minutes, if the Tn < 26.6°F(-3°C)

Tn < 23°F(-5°C) (and after 3 minutes,

if the Tn < 23°F(-5°C)

(Integrating OFF count defrost)

Compressor OFF count : 40 times (Less than 10 minutes)

Defrost start

Defrost Indicator: [Operation lamp] 7 sec ON / 2 sec O FF

3 sec later Compressor : OFF 3 sec later Outdoor fan motor : OFF 35sec later 4WAY valve : OFF 41sec later Compressor : ON

Outdoor HEX temp. : Over 59°F(15°C)

Compressor ON time : Maximum 15 minutes

Defrost end

01-27

27. CHECK RUN OPERATION (AUTOMATIC WIRING CORRECTION)

If there is a mis-wiring after check operation, switch the indoor unit port automatically on the microcomputer. (Check operating time)

-Cooling : 30min (Time of approximately)

-Heating : 60min (Time of approximately)

Operating procedure for check run

NOTE : Be sure that the power is turend ON before starting the check run.

(1) Press the “CHECK” swtich for 3 seconds or more.

CHECK

SW2

The positions of the swtiches on the outdoor unit control board are shown in the right.

(2) The number of indoor units ( and the places ) connected through the communication lines is displayed.

・

If the displayed number of units ( places ) and the installed number of units ( places ) is the same, proceed to step (3).

・

If the displayed number of units ( places ) and the installed number of units (places ) is not the same, shut off the power and check whether the indoor and outdoor communication lines are properly connected.

・

If there is no operation for 1 minute, the LED will return to the original display.( POWER / MODE LED : ON )

(3) Press the “CHECK” switch for 3 seconds or more again. Check run is initiated.

When check run is initiated, all LEDs from A to F will flash. ( Preliminary operation ) The LED for each indoor unit will switch off in order as check for each unit is completed.

To interrupt the check run, press the “CHECK” switch.

Example) When 4 indoor units ( A to D ) are connected.Example) When 4 indoor units ( A to D ) are connected.

ERROR

POWER / MODE

ERROR

MONITOR

POWER / MODE

MONITOR

AC FEDB

(2-blink)

(4) After the check run is complete, results will be displayed. Please fill the displayd result table accordingly.

NOTE Automatic wiring correction will not be completed if the power is turned off while displaying the result.

・

To confirm the automatic wiring correction, be sure to carry out step (5). If frost is formed on the outdoor unit while displaying the result, Automatic defrost function will operate.

・

Proceed to step (5) after the defrost function is finished.

01-28

If the connection is correct [(Example) When 4 indoor units are connected]

After the number of connected units are displayed, the LED for each unit will light up in order from A to D.

POWER / MODE

ERROR

MONITOR

(7 sec.)

If the connection is incorrect [(Example) When connection of B and C of the 4 units are reversed]

After the number of connected units are displayed, B and C will light up in reverse.

POWER / MODE

ERROR

MONITOR

(7 sec.)

[How to record the contents]

Please fill the displayed result according to the following example. Example 1

When piping A to D is connected bu the wires fo B and C are connected in reverse.

Displayed results

The LED will light up in 7 second interval in the following order.

POWER / MODE

ERROR

MONITOR

(7 sec.)

01-29

Example of result table (a) Please wirte a where the LEDs light up in the order that they light up.

(b) Based on the results of step (a), please record as follows. Please trace the dotted cicle woth a pen if multiple places liught up.

Please write the order from A to D in which the LEDs lit up inside the cicle.

Correct the wiring manually.*2 Proceed to step (6).

/ MODE

ERROR

AC FEDB

MONITOR

POWER

Use the Automatic wiring correction function.*1 Proceed to step (5).

NOTE:

*1 : By using this function, the wiring is automatically corrected according to the piping. *2 : When correcting the wiring manually, please disconnect the power supply or turn off the breaker during

results display, and then change the wiring manually according to the obtained test result.

For example, in Example 1, the wirings connected to the terminals B and C is to be exchanged manually.

Please write down the same results in the label on the reverse side of the service panel. The results recorded are needed at the time of servicing.

(5) During results display, press the “CHECK” swtich for 3 seconds or more.

After LEDs A to F have lit in turn, all LEDs will light up indicating that the automatic wiring correction is completed.

(6) Disconnect the power supply or turn off the breaker and wait 10 minutes then turn the power back on and perform test run.

NOTE: If you do not disconnect the power supply or turn off the breaker, normal operation is not possible. Others

If an error occurs during check run it will be suspended. Please correct the error and start check run again.

・

After the check run, if automatic wiring correction is carried out, the indoor unit’s position will be modified

・

to match the piping. (Please note that the display of the optional remote controller changes.) If you start check run again after the automatic wiring correction is finished, the modification will be reset.

・

01-30

Check run judgment failure display

 If check run cannot be performed, the following is displayed. In this case, the check

run will stop. Please check by using the cooling test run of the indoor unit.

Temperature out of range judgment

ERROR

POWER

MODE

MONITOR

FEDC

(2-blink)

blink

(High-speed)

Wiring / piping number difference

ERROR

POWER

MODE

(2-blink)

blink

(High-speed)

blink

MONITOR

FEDC

Re-display check run results

If you wish to check the automatic wiring correction contents, by briefly pressing the

"CHECK" switch, the check run results is displayed. Please check the check run results by referring to the result table in step (4) of "8.3. Operating procedure for check run".

 If the automatic wiring correction contents has not been done, the POWER/MODE

LED will blink twice and the MONITOR LED will turn off.

Automatic wiring correction memory reset

CAUTION

When relocating the unit, reset the memory beforehand, or the unit may not function normally.

(1) Press the "CHECK" switch. The LED will light as shown in “8.5 Re-display check run results”. (2) Press the "CHECK" switch for more than 3 seconds when the LED is on. (3) The LEDs from A to F will light in sequence, and then all LEDs will light to indicate

the completion of the Automatic wiring correction memory reset.

(4) Disconnect the power supply or turn off the breaker.

01-31

28. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL

The discharge gas thermosensor (discharge thermistor : Outdoor side) will detect discharge gas temperature.

When the discharge temperature becomes higher than Temperature , the compressor frequency is decreased 10rps, and it continues to decrease thefrequency for 10rps every 120 seconds until the temperature becomes lower than Temperature .

When the discharge temperature becomes lower than Temperature ,the control of the compressor frequency is released.

When the discharge temperature becomes higher than Temperature ,the compressor stops.

( Table 24 : Discharge temperature over rise prevension control / Release temperature )

Temperature

Temperature Temperature

AOU36RLXFZH AOU45RLXFZ

219°F (104°C) 214°F (101°C) 230°F (110°C)

2. CURRENT RELEASE CONTROL

The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit value that was set up with the outdoor temperature. The compressor frequency returns to the designated frequency of the indoor unit at the time when the frequency becomes lower than the release value.

3. COOLING PRESSURE OVER RISE PROTECTION

When the outdoor unit discharge pressure sensor rises to 580.2 psi (4 MPa) or greater, the compressor is stopped and error display is indicated.

01-32

4. HIGH TEMPERATURE RELEASE CONTROL ( Heating mode )

On heating mode, the compressor frequency is controlled as following based on the detection value of the discharge pressure sensor.

( Fig. 23 : Heating overload protection control )

discharge pressure rises

Outdoor heat exchange tempreture

8.6°F(-13°C) < Tn < 12.2°F(-11°C)

5°F(-15°C) < Tn < 8.6°F(-13°C)

-13°F(-25°C) < Tn < 5°F(-15°C)

-20.2°F(-29°C) < Tn < -13°F(-25°C)

Tn < -20.2°F(-29°C)

478.62 psi

(3.30 MPa)

464.12 psi

(3.20 MPa)

435.11 psi

(3.00 MPa)

377.10 psi

(2.60 MPa)

333.59 psi

(2.30 MPa)

A psi ( A MPa )

B psi ( B MPa )

C psi ( C MPa )

The compressor frequency is decreased 15rps every 120 seconds.

The compressor frequency is decreased 2rps every 120 seconds.

Release

Stable range

5. HIGH PRESSURE PROTECTION

During the compressor operation, when detect the condition of the following table value, the protection function will be worked. The operation condition varies according to the compressor speed. The protection function is, the compressor speed is descreased 7 rps every 60 seconds.

( Table 26 : Cooling operation )

Release value [ psi (MPa) ] Hp < 471.37 psi (3.25 MPa)

Hp < 522.14 psi (3.60 MPa)

Hp < 449.62 psi (3.10 MPa)

rps < 20

20 < rps < 90 90 < rps < 100

= =

Operation value [ psi (MPa) ]Compressor frequency [ rps ]

Hp > 500.38 psi (3.45 MPa)

Hp > 551.14 psi (3.80 MPa)

Hp > 478.62 psi (3.30 MPa)

Dsicharge pressure [ psi (MPa) ]

449.62 psi

(3.10 MPa)

478.62 psi

(3.00 MPa)

406.11 psi

(2.80 MPa)

362.59 psi

(2.50 MPa)

319.08 psi

(2.20 MPa)

406.11 psi

(2.80 MPa)

391.60 psi

(2.70 MPa)

377.10 psi

(2.60 MPa)

333.59 psi

(2.30 MPa)

290.08 psi

(2.00 MPa)

( Table 27 : Heating operation )

Compressor frequency [ rps ]

rps < 20

20 < rps < 90 90 < rps < 100

= =

100 < rps

Operation value [ psi (MPa) ] Release value [ psi (MPa) ]

Hp > 500.38 psi (3.45 MPa)

Hp > 507.63 psi (3.50 MPa)

Hp > 478.62 psi (3.30 MPa)

Hp > 449.62 psi (3.10 MPa)

Hp < 471.37 psi (3.25 MPa)

Hp < 478.62 psi (3.30 MPa)

Hp < 449.62 psi (3.10 MPa)

Hp < 420.61 psi (2.90 MPa)

Hp : detected discharge pressure sensor value

rps : detected compressor frequency

6. COMPRESSOR TEMPERATURE PROTECTION

Compressor temperature sensor is monitoring the compressor Temperature When the compressor temperature sensor detects higher than Temperature , the compressor is stopped.

When 3 minutes has passed from the compressor stop and the compressor temperature sensor detects lower than Temperature , protection is released and the compressor will restart.

( Table 28 : Operation value )

Temperature

176°F (80°C)

AOU36RLXFZH AOU45RLXFZ

Temperature

226°F (108°C)

01-33

29. PUMP DOWN OPERATION

When moving or discarding the air conditioner, in order to consider the environment and avoid the discharge of refrigerant to the atmosphere, please pump down according to the following procedure.

(1) Connect the pressure gauge to the charging port. (2) Change the DIP switch on the board (SET1-2) to ON*1

SET1

1 2 3 4

*Be sure the power supply is

disconnected on the breaker is turned off when changing the DIP switch.

During the pump down operation, make sure that compressor is off before you remove the refrigerant piping. Do not remove the connection pipe while the compressor is in operation with valve open. This may cause abnormal pressure in the refrigeration cycle that leads to breakage and even injury.

*1: DIP switch (SET1-2)

(3) To start operation, press the [PUMP DOWN] switch*2 for 3 seconds or press after the

power has been on for 3 min.

TEST RUN

1WS

PUMP DOWN

During pump down, the LED (POWER/MODE) will  ash 3 times consecutively.

ERROR

POWER

MODE

(3-blink)

NOTE:

If the [PUMP DOWN] switch is pressed during compressor operation, the compressor will stop, and the operation will start after about 3 min.

(4) Close the liquid pipe valve. (5) When 7.3 psi ~ 0 psi (0.05 MPa ~ 0 MPa) is shown, close the gas pipe valve. (6) Stop pump down by pressing the [PUMP DOWN] switch for 3 seconds.

The LED will light as follows.

*2: Push switch (SW1)

MONITOR

FEDC

WARNING

ERROR

POWER

MODE

MONITOR

(3-blink)

(7) Disconnect the power supply or turn off the breaker.

NOTE:

 If the pump down is not stopped by pressing the switch as in step (6), it will stop

automatically after 15 min. and the LED will light as follows. If the pump down is complete, disconnect the power supply or turn off the breaker. If not completed open the liquid pipe valve, and then start again from step (3).

ERROR

POWER

MODE

MONITOR

(3-blink)

 In order to interrupt the pump down operation, press the [PUMP DOWN] switch

 The pump down may stop before completion due to error. To complete the pump

blink

(High-speed)

again. The LED will return to the original display before starting pump down. (POWER/MODE LED: On)

down, correct the error, open the liquid pipe valve and then start from step (1) again. Otherwise, the refrigerant can be recovered from the service port.

FEDC

01-34

30. TEST RUN ( For Outdoor unit )

CAUTION

Always turn on the power 12 hours prior to the start of the operation in order to protect the compressor.

(1) Indoor unit

Is the drain normal?

Is there any abnormal noise and vibration during operation?

(2) Outdoor unit

Is there any abnormal noise and vibration during operation?

Will noise, wind, or drain water from the unit disturb the neighbors?

Is there any gas leakage?

'RQRWRSHUDWHWKHDLUFRQGLWLRQHULQWKHWHVWUXQQLQJVWDWHIRUDORQJWLPH )RUWKHRSHUDWLRQPHWKRGRIWKHWHVWUXQIRULQGRRUXQLWDQGFHQWUDOUHPRWHFRQWUROOHU

refer to the operating manual and perform operation check.

TEST RUN method

Be sure to turn the power off before starting the test run. (1) Check the 3-way valves (both at the liquid side and gas side) are opened. Please

con fiUPWKDWWKH',3VZLWFK6(7LVVZLWFKHG2))

(2) 6HWWKHRSHUDWLRQPRGHWR³&22/´RU³+($7´,I\RXZLVKWRWKH',3VZLWFK6(7

WR+($7SOHDVHVZLWFKLWDIWHUWHPSRUDULO\GLVFRQQHFWLQJWKHSRZHUVXSSO\RU

turning off the breaker switching the power off.

SET1-1

HEAT

SET1

1 2 3 4

COOL

 In the fiUVWWHVWUXQEHVXUHWRVHWWKHRSHUDWLRQPRGHWR³&22/´  7KHRSHUDWLRQPRGHFDQQRWEHVZLWFKHGEHWZHHQ³&22/´DQG³+($7´GXULQJWKHWHVW

UXQ7RVZLWFKWKHRSHUDWLRQPRGHEHWZHHQ³&22/´DQG³+($7´VWRSWKHWHVWUXQ

switch the operation mode, and then start the test run again.

(3) 3UHVV7(67581VZLWFKIRUPRUHWKDQVHFRQGV

7KH32:(502'(/('flashes once.

TEST RUN

1WS

PUMP DOWN

6:

ERROR

POWER

MODE

(1-blink)

(4) Confirm operating status. (5) 3UHVV7(67581VZLWFKIRUPRUHWKDQVHFRQGV

MONITOR

FEDC

ERROR

POWER

MODE

MONITOR

32:(502'(/('ZLOOWXUQRQDQGWHVWUXQVWRSV

FEDC

01-35

R410A

Slim Duct / Compact Cassette Compact Wall Mounted / Wall Mounted / Floor type

INVERTER (MULTI )

2 . TROUBLE SHOOTING

2-1 ERROR DISPLAY

2-1-1 INDOOR UNIT AND WIRED REMOTE CONTROLLER DISPLAY

Please refer the flashing pattern as follows. The Operation, Timer, Economy lamps operate as follows according to the error contents.

Error Contents

Serial Communication Error Wired Remote Controller

Communication Error Indoor Unit Capacity Error Indoor Unit Model Information Error

EEPROM Access Abnormal Manual Auto Switch Error

Operation

(Green)

3 times

Indoor Unit Display

Timer

(Orange)

5 times

Economy

(Green)

Continuous1 times1 times

Continuous2 times1 times

Continuous2 times2 times

Continuous2 times

Continuous

Wired Remote Controller Display

Trouble shooting

1,2

Indoor Room Thermistor Error

Indoor Heat Ex. Thermistor Error

Indoor Unit Fan Motor Error

Drain Pump Error

Damper Error

Intake Grille Error

Outdoor Unit Model Information Error

Inverter Error

Active Filter Error

IPM Error

Discharge Thermistor Error

Compressor Thermistor Error

Heat Ex. Thermistor Error (OUT)

Outdoor Thermistor Error

1 times

3 times5 times

7 times5 times

8 times5 times

2 times6 times

3 times6 times

6 times

7 times

7 times 3 times

7 times 4 times

4 times

5 times6 times

1 times

2 times

Continuous4 times

Continuous4 times 2 times

Continuous1 times5 times

Continuous

12-1,12-2

2-Way Valve Thermistor Error

3-Way Valve Thermistor Error

CT Error

Discharge Pressure Sensor Error

Over Current Error

Compressor Control Error

Outdoor Unit Fan Motor Error

4-Way Valve Error

Coil (expansion valve) Error

Discharge Temp. Error

Compressure Temp. Error

7 times 6 times

4 times8 times

6 times8 times

4 times9 times

9 times

9 times 9 times

9 times 10 times

10 times 3 times

5 times

7 times

1 times10 times

02-01

Continuous

1. SELF - DIAGNOSIS

When " Er " in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authorized service personnel.

Unit number (usually 0)

Error code

SUMOTU WETH FR SA

ex. Self-diagnosis check

2. ERROR CODE HISTORY DISPLAY

Up to 16 memorized error codes may be displayed for the indoor unit connected to the remote controller.

1. Stop the air conditioner operation.

2. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds or more to start the self-diagnosis.

Error code

Error history number

SU MO TU WETH FR SA

3. Press the SET TEMPERATURE button to select the error history number.

Lower

01234567

FEdcbA98

Raise

4. Press the SET TEMPERATURE buttons , simultaneously for 3 seconds or more or there is no key input for 60 seconds to stop the display.

02-02

2-1-2 SIMPLE REMOTE CONTROLLER DISPLAY

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 code

Faulty unit No. (Remote controller address)

Ex. Error code display

2-1-3 CENTRAL REMOTE CONTROLLER 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

2-1-4 OUTDOOR UNIT DISPLAY

 If an error occurs, the LED will light up to display the error location and the error code.

In the event of an error

 The error LED frashes quickly.

ERROR

POWER

MODE

blink

(High-speed)

Error location display

 LEDs A to F of MONITOR light up and display the error location. In the case of an

overall error, LEDs A to F of MONITOR do not light up.

Example) Coil error in indoor unit B

ERROR

POWER

MODE

MONITOR

FEDC

MONITOR

FEDC

blink

(High-speed)

02-03

Error code display

While the error is occurring, please briefly press SW1. The error code is displayed.

Ex.) Serial communication error ( Error cord = 11.3 )

(1-blink) (1-blink)

Blink

(High-speed)

Display mode LED on : LED off :

Blink : (0.5s Light on / 0.5s Light off)

For MONITOR

(A and B)

A : 10 - Blink C : 11 - Blink

F : 12 - Blink

J : 13 - Blink P : 14 - Blink U : 15 - Blink

CDEF

1 2 3 4 5 6 7 8 9 A C F J P

02-03-1

Error code Error contents

11. 3

11. 4

16. 5

22. 1

Serial communication error Serial communication error

during operation Communication error between

controller and outdoor unit Indoor unit capacity error

Outdoor unit LED display part

1 1

1 16 22

Monitor

DEF

Trouble shooting

1 2

4 5

5U. 1

62. 8

63. 1

65. 3

71. 1

72. 1

73. 3

74. 1

76. 1

76. 2

84. 1

86. 1

94. 1

95. 1

Indoor unit error PCB model information error62. 1 EEPROM access error62. 3 EEPROM data corruption error Inverter error IPM error (Trip terminal L error) Dsicharge temp. sensor error Compressor temp. sensor error Heat ex. liquid temp. sensor error Outdoor temp. sensor error

valve sensor error

Current sensor 1 error (stoppage permanently)

Discharge pressure sensor error Trip detection

Compressor motor control error

515 62 62 62 63 65 71 72 73 74 76 76 84 86 94 95

14 15

16 17 19 20 21 22 23 24 25 26 27 28 29

97. 3

99. 1 9A. 1 A1. 1

Fan motor 1 error(Duty error) 4-way valve error Coil 1 (expansion valve 1) error

Discharge temperature 1 error (stoppage permanently)

Compressor 1 temperature errorA3. 1

: Flashing : No indication

1 - 15 : Outdoor LED Blink ( 1 to 15 times ) 0.5s Light on / 0.5s Light off

NOTE

Error code 16.5 : Occur when using the Home remote controller. Error code 5U.1 : Indoor unit all error

97 99 910

10 1 10 1

This Error code list is excerpt by instalation manual.

02-04

30 31 32 33

2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1 OUTDOOR UNIT Error Method:

Serial Communication Error (Serial Reverse Transfer Error)

Detective Actuators:

Outdoor unit main PCB Outdoor unit fan motor

Indicate of Display:

Indoor Unit Operation lamp : 1 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : 11]

Outdoor Unit

ABCDEF

111

: Light ON : Light OFF n : n time blinking

Detective details:

When the indoor unit cannot receive the serial signal from outdoor unit more than 2 minutes after power ON, or the indoor unit cannnot receive the serial signal more than 15 seconds during normal operation.

Forecast of Cause:

1. Connection failure 2. External cause 3. Main PCB failure 4. Active filter module failure

5. Transistor PCB (IPM) failure 6. Filter PCB failure 7. Outdoor unit Fan motor failure

Test 1-1 : Reset the power and operate

Does error indication reappear?

YES

Test 2 : Check connection

Check any loose or removed connection line of between indoor unit and outdoor unit.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

Check connection condition in control unit. (If there is loose connector, open cable or miss-wiring)

Test 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).

Monitor

Test 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at outdoor unit terminal L1 - L2.

Test 4 : Check serial signal (Reverse transfer signal)

Check serial signal (Reverse transfer signal)

>> Check if indicated value swings between AC90V and AC270V at outdoor unit terminal 1 - 3. >> If it is abnormal, Check the parts as follows.

- Outdoor unit fan motor (SERVICE PARTS INFORMATION 6)

- Active filter module (SERVICE PARTS INFORMATION 8)

- Filter PCB (Check the wire of CN201) >> If Outdoor fan motor is abnormal, replace Outdoor unit fan motor and Main PCB. (SERVICE PARTS INFORMATION 10)

>> If Active filter module or IPM is abnormal, replace it. >> If the parts are normal, replace Main PCB. (SERVICE PARTS INFORMATION 10)

BLACK WHITE RED

1 2

02-05

Trouble shooting 2 INDOOR UNIT Error Method:

Serial Communication Error (Serial Forward Transfer Error)

Indicate of Display:

Indoor Unit Operation lamp : 1 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : 11]

Outdoor Unit

ABCDEF

111 111

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB

Detective details:

When the outdoor unit cannot properly receive the serial signal from indoor unit for 15 seconds or more.

Forecast of Cause:

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

Test 1-1 : Reset the power and operate

Does error indication reappear?

YES

Test 2 : Check connection

Check any loose or removed connection line of between indoor unit and outdoor unit.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

Check connection condition in control unit. (If there is loose connector, open cable or miss-wiring)

Test 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).

Test 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at outdoor unit terminal L1 - L2.

Test 4 : Check serial signal (Forward transfer signal)

Check Serial Signal (Forward Transfer Signal)

>> Check if Indicated value swings between AC30V and AC130V at Outdoor Unit Terminal 2 - 3. >> If it is abnormal, replace Controller PCB. >> If it is abnormal, Check Indoor unit fan motor. (SERVICE PARTS INFORMATION 5) >> If Indoor unit fan motor is abnormal, replace Indoor unit fan motor and Controller PCB.

BLACK WHITE RED

1 2

02-06

Trouble shooting 3 INDOOR UNIT Error Method:

Wired Remote Controller Communication Error

Indicate of Display:

Indoor Unit Operation lamp : 1 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 12]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB Wired remote controller

Detective details:

When the indoor unit cannot properly receive the signal from Wired Remote Controller for 1 minutes or more.

Forecast of Cause:

1. Connection failure 2. Wired Remote Controller failure 3. Controller PCB failure

Test 1 : Check the connection of terminal

Check & correct the followings. Check the connection of terminal between Wired Remote Controller and indoor unit, and check if there is a disconnection of the cable.

OKOK

Test 2 : Check Wired Remote Controller and Controller PCB

Check Voltage at terminal 1-3 of Controller PCB or Communication PCB. (Power supply to Remote Control) Compact Cassette, SlimDuct Type : CN14 Wall Mount , Floor Type : CN16 Compact Wall Mount Type : CNC01 (UTY-XCBXZ2)

>> If it is DC12V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control >> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again) >> Replace Controller PCB

02-07

Trouble shooting 4 OUTDOOR UNIT Error Method:

Communication Error Between Controller And Outdoor Unit

Indicate of Display:

Indoor Unit Operation lamp : - time Flash Timer lamp: - time Flash

ERROR CODE : [E : --]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit Main PCB

Detective details:

When the home controller cannot 60sec receive the signal from

Home Controller

Forecast of Cause:

1. Connection failure 2. Home Controller failure 3. Main PCB failure

Test 1 : Check the connection of terminal

Check & correct the followings. Check the connection of terminal between Wired Remote Controller and indoor unit, and check if there is a disconnection of the cable.

OKOK

Test 2 : Check Home Controller and Main PCB

Check Voltage at terminal 1-3 (CN93) of Main PCB. (Power supply to Remote Control)

>> If it is DC12V, Home Controller is failure. (Main PCB is normal) >> Replace Home Controller >> If it is DC 0V, Main PCB is failure. (Check Home Controller once again) >> Replace Main PCB

(SERVICE PARTS INFORMATION 10)

02-08

Trouble shooting 5 INDOOR UNIT Error Method:

Indoor Unit Capacity Error

Indicate of Display:

Indoor Unit Operation lamp : 2 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 22]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

All indoor unit

Detective details:

The total capacity of the indoor unit if it is install beyond.

Forecast of Cause:

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

Test 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.

OKOK

Test 2 : Replace Main PCB

If Test 1 do not improve the symptom, replace Main PCB of Outdoor unit.



(SERVICE PARTS INFORMATION 10)

02-09

Trouble shooting 6 INDOOR UNIT Error Method:

Indoor Unit Model Information Error EEPROM Access Abnormal

Indicate of Display:

Indoor Unit Operation lamp : 3 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 32]

Detective Actuators: Detective details:

Indoor unit controller PCB

When power is on and there is some below case.

When model information of EEPROM is oncorrect. When the access to EEPROM failed.

Forecast of Cause:

1. External cause 2. Defective connection of electric components 3. Controller PCB failure

Outdoor Unit

ABCDEF

515

: Light ON : Light OFF n : n time blinking

Monitor

Test 1-1 : Reset Power Supply and operate

Does Error indication show again?

YESYES

Test 2 : Check Indoor unit electric components

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

Test 3 : Replace Controller PCB

Change Controller PCB.

Test 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).

Note : EEPROM

EEPROM(Electronically Erasable and Programmable Read Only Memory) is a nonvolatile memory which keeps memorized information even if power is turned off. It can change the contents electronically. To change the contents, it uses higher voltage than normal, and it can not change a partial contents. (Rewriting shall be done upon erasing the all contents.) There is a limit in a number of rewriting.

02-10

Trouble shooting 7 INDOOR UNIT Error Method:

Manual Auto Switch Error

Indicate of Display:

Indoor Unit Operation lamp : 3 time Flash Timer lamp: 5 time Flash

ERROR CODE : [E : 35]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB Indicator PCB Manual auto switch

Detective details:

When the Manual Auto Switch becomes ON for consecutive 60 seconds or more.

Forecast of Cause:

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

Test 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.

OKOK

Test 2 : Replace Controller PCB and Indicator PCB

If Test 1 do not improve the symptom, replace Controller PCB and Indicator PCB.

02-11

Trouble shooting 8 INDOOR UNIT Error Method:

Indoor Room Thermistor Error

Indicate of Display:

Indoor Unit Operation lamp : 4 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : 41]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB circuit Room temperature thermistor

Detective details:

Room temperature thermistor is open or short is detected always.

Forecast of Cause:

1. Connector failure connection

2. Thermistor failure

3. Controller PCB failure

Test 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.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

104866850

5.308.0412.5420.1733.6258.25

Temperature (°C) Temperature (°F) Resistance Value

(k )

-10 14

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

4540302010

113

4.35

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

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

Compact wall mount circuit diagram(Connector connection)

BLACK

CN4

Wall mount circuit diagram (Direct soldering to PCB)

CN3

CN1

Floor circuit diagram (Connector connection and Direct soldering to PCB)

CN3

CN1

3 4

1 2

121

1 2

3 4

BLACK BLACK

RED

WHITE

BLACK BLACK

GRAY GRAY

BLACK BLACK

1 2 3

BLACK

1 2

BLACK

H/E Thermistor

Room Temp. Thermistor

H/E Thermistor

Room Temp. Thermistor

H/E (MID) Thermistor

Room Temp. Thermistor

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

Compact cassette circuit diagram (Connector connection)

GRAY

121

CN5

CN8

Slim duct circuit diagram (Connector connection)

CN5

CN7

CN8

11 22

121

1 2

11 22

GRAY

BLACK BLACK

GRAY GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

H/E (MID) Thermistor

Room Temp. Thermistor

02-12

Trouble shooting 9 INDOOR UNIT Error Method:

Indoor Heat Ex. Thermistor Error

Indicate of Display:

Indoor Unit Operation lamp : 4 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 42]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB circuit Heat exchanger thermistor

Detective details:

Heat exchanger thermistor is open or short is detected always.

Forecast of Cause:

1. Connector failure connection

2. Thermistor failure

3. Controller PCB failure

Test 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.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

140

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

-20

-4

149

9.6911.64

68503214

62.91103.34176.03312.27579.591131.91

30 86

39.57

104

25.64

5020100-10

122

17.06

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

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

Compact wall mount circuit diagram (Connector connection)

BLACK

CN4

Wall mount circuit diagram (Direct soldering to PCB)

CN3

CN1

Floor circuit diagram (Connector connection and Direct soldering to PCB)

CN3

CN1

3 4

1 2

121

1 2

3 4

BLACK BLACK

RED

WHITE

BLACK BLACK

GRAY GRAY

BLACK BLACK

H/E Thermistor

Room Temp. Thermistor

H/E Thermistor

BLACK

Room Temp. Thermistor

H/E (MID) Thermistor

Room Temp. Thermistor

Compact cassette circuit diagram (Connector connection)

GRAY

121

CN5

CN8

Slim duct circuit diagram (Connector connection)

CN5

CN7

CN8

11 22

121

1 2

11 22

GRAY

BLACK BLACK

GRAY GRAY

BLACK BLACK

H/E (MID) Thermistor

Room Temp. Thermistor

H/E (MID) Thermistor

Room Temp. Thermistor

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

02-13

Trouble shooting 10 INDOOR UNIT Error Method:

Indoor Unit Fan Motor Error

Indicate of Display:

Indoor Unit Operation lamp : 5 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : 51]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB Indoor unit fan motor

Detective details:

When the condition that actual frequency of indoor fan is below 1/3 of target frequency is continued more than 56 seconds.

Forecast of Cause:

1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise

4. Control PCB failure 5. Indoor unit fan motor failure

Test 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.

Test 2 : 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.

Test 3 : Check Indoor unit fan motor

Check Indoor unit fan motor.

>>If Indoor unit fan motor is abnormal, replace Indoor unit fan motor.

(SERVICE PARTS INFORMATION 5)

Test 4 : Replace Controller PCB

If Test 1- 3 do not improve the symptom, replace Controller PCB.

02-14

Trouble shooting 11 INDOOR UNIT Error Method:

Drain Pump Error

Indicate of Display:

Indoor Unit Operation lamp : 5 time Flash Timer lamp: 3 time Flash

ERROR CODE : [E : 53]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB circuit Float switch

Detective details:

When Float switch is ON for more than 3 minutes.

Forecast of Cause:

1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure 4. Drain pump failure 5. Hose clogging

Test 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

Test 2 : Check Connector (CN 9) / Wire

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

>> Replace Float switch if the wire is abnormal.

Test 3 : Check Drain Hose

Check Drain Hose .

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

Test 4 : Check Controller PCB

If Test 1 - 3 do not improve the symptom, change Controller PCB and execute the check operation again.

Attention!!

Wall mount / Compact wall mount type does not have a float switch. In this case, replace and set up the original address. Please refer to.

Controller PCB

02-15

Trouble shooting 12-1 INDOOR UNIT Error Method:

Damper Eror

(Damper (open/close) detection limit switch error)

Indicate of Display:

Indoor Unit Operation lamp : 5 time Flash Timer lamp: 7 time Flash

ERROR CODE : [E : 57]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB Limit switch Damper

Detective details:

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 close though the damper open. (Upper and lower air flow)

Forecast of Cause:

1. Limit switch failure 2. Shorted connector/ wire 3. Damper faulure 4. Controller PCB failure

Test 1 : Check Limit switch

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.

Test 2 : Check Connector (CN18) / Wire

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

>>Replace Limit switch if the wire is abnormal

Test 3 : Check Damper

Check the obstruction of damper movement. Check the damper movement.

>>Replace Damper if the damper is abnormal

Test 4 : Replace Controller PCB

If Test 1 - 3 do not improve the symptom, change Controller PCB.

02-16

Trouble shooting 12-2 INDOOR UNIT Error Method:

Damper Error

(Damper (open/colse) simultaneous detection limit switch error)

Indicate of Display:

Indoor Unit Operation lamp : 5 time Flash Timer lamp: 7 time Flash

ERROR CODE : [E : 57]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB

Detective details:

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

Limit switch

Forecast of Cause:

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

Test 1 : Check Limit switch

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.

Test 2 : Check Connector (CN18) / Wire

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

>>Replace Limit switch if the wire is abnormal

Test 3 : Replace Controller PCB

If Test 1 - 2 do not improve the symptom, change Controller PCB.

02-17

Trouble shooting 13 INDOOR UNIT Error Method:

Intake Grille Error

Indicate of Display:

Indoor Unit Operation lamp : 5 time Flash Timer lamp: 8 time Flash

ERROR CODE : [E : 58]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit controller PCB

Detective details:

When the Micro switch detected open while running the compressor.

Micro switch

Forecast of Cause:

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

Test 1 : Check Limit switch

Check operation of Micro switch. (any blocking by dust, etc.) Remove Micro switch and check ON/OFF switching operation by using a meter.

>>If Micro switch is detective, replace it.

Test 2 : Check Connector (CN11) / Wire

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

>>Replace Micro switch if the wire is abnormal

Test 3 : Replace Controller PCB

If Test 1 - 2 do not improve the symptom, change Controller PCB.

02-18

Trouble shooting 14 INDOOR UNIT Error Method:

Outdoor Unit Model Information Error

Indicate of Display:

Indoor Unit Operation lamp : 6 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 62]

Detective Actuators: Detective details:

Outdoor unit main PCB

When power is on and there is some below case.

When model information of EEPROM is incorrect. When the access to EEPROM failed.

Forecast of Cause:

1. External cause 2. Defective connection of electric components 3. Main PCB failure

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

Test 2 : Check Indoor unit electric components

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

Test 3 : Replace Main PCB

If Test 1 - 2 do not improve the symptom, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

Test 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).

Note : EEPROM

02-19

Trouble shooting 15 OUTDOOR UNIT Error Method:

EEPROM Access Error

Indicate of Display:

Indoor Unit Operation lamp : - time Flash Timer lamp: - time Flash

ERROR CODE : [E : --]

Detective Actuators: Detective details:

Outdoor unit Main PCB

When the check run if can not write data to the EEPROM.

Forecast of Cause:

1. External cause 2. Main PCB defective

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 1-1 : Turn the power on again?

Error displayed again?

・

YES

Test 2 : Replace Main PCB

If Test 1 do not improve the symptom, replace Main PCB(Outdoor unit).

(SERVICE PARTS INFORMATION 10)

Test 1-2 : External cause

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.

02-20

Trouble shooting 16 OUTDOOR UNIT Error Method:

EEPROM Data Corruption Error

Indicate of Display:

Indoor Unit Operation lamp : - time Flash Timer lamp: - time Flash

ERROR CODE : [E : --]

Detective Actuators: Detective details:

Outdoor unit Main PCB

When the power is turned on and When the data of the automatic correction was damaged

Forecast of Cause:

1. External cause 2. Main PCB defective

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 1-1 : Turn the power on again?

・

Error displayed again?

YES

Test 2 : Replace Main PCB

If Test 1 do not improve the symptom, replace Main PCB(Outdoor unit).

(SERVICE PARTS INFORMATION 10)

Test 1-2 : External cause

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.

02-21

Trouble shooting 17 OUTDOOR UNIT Error Method:

Inverter Error

Indicate of Display:

Indoor Unit Operation lamp : 6 time Flash Timer lamp: 3 time Flash

ERROR CODE : [E : 63]

Detective Actuators: Detective details:

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Inverter PCB

Error information received from Inverter PCB

Forecast of Cause:

1. External cause 2. Power supply to Filter PCB to Inverter PCB wiring disconnection, open

3. Filter PCB failure 4. Inverter PCB failure

Test 1-1 : Turn the power on again?

Error displayed again?

・

Test 1-2 : External cause

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.

YES

Test 2 : Check the wiring (Power supply to Filter PCB to Inverter PCB)

Connector and wiring connection state check Cable open check

Test 3 : Replace Inverter PCB

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

and execute the check operation again.

Test 4 : Replace Main PCB

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

and execute the check operation again.

Test 5 : Replace Filter PCB

If Test 4 do not improve the symptom, replace Filter PCB(Outdoor unit).

(SERVICE PARTS INFORMATION 10)

02-22

Trouble shooting 18 OUTDOOR UNIT Error Method:

Active Filter Error

Indicate of Display:

Indoor Unit Operation lamp : 6 time Flash Timer lamp: 4 time Flash

ERROR CODE : [E : 64]

Outdoor Unit

No Display

Detective Actuators:

Outdoor unit main PCB Active filter module

Detective details:

When inverter input DC voltage is higher than 430V or lower than 110V. When a momentary power cut off occurred on low voltage.

Forecast of Cause:

1. External cause 2. Connector connection failure 3. Main PCB failure 4. Active filter module failure

Test 1 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop : Check if there is a large load electric apparatus in the same circuit. Momentary power failure : Check if there is a defective contact or leak current

in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Test 2 : Check connection of Connector

Check if connector is removed. Check erroneous connection. Check if cable is open.

>>Upon correcting the removed connector or miss-swiring, reset the power.

Test 3 : Check Active filter module

Check Active filter module. (SERVICE PARTS INFORMATION 8)

>>If Active filter module is abnormal, replace it.

Test 4 : Replace Main PCB

If Test 1 - 3 do not improve the symptom, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

02-23

Trouble shooting 19

OUTDOOR UNIT Error Method:

IPM Error

Indicate of Display:

Indoor Unit Operation lamp : 6 time Flash Timer lamp: 5 time Flash

ERROR CODE : [E : 65]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB Compressor

Detective details:

When more than normal operating current to IPM in Main PCB flows, the compresor stops. After the compressor restarts, if the same operation is repeated within 40 sec, the compressor stops again.

If and repeats 5 times, the compressor stops permanently.

Forecast of Cause:

1. Defective connection of electric components 2. Outdoor Fan Operation failure

3. Outdoor Heat Exchanger clogged 4. Compressor failure 5. Main PCB failure

Test 1 : Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose. Check if connector is removed. Check erroneous connection. Check if cable is open.

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

Test 2 : Check Outdoor Fan, Heat Exchanger

Is there anything obstructing the air distribution circuit? Is there any clogging of Outdoor Heat Exchanger? Is the Fan rotating by hand when operation is off?

>> If the Fan Motor is locked, replace it.

Test 3 : Check Outdoor Fan

Check Outdoor Fan Motor. (Refer to Trouble shooting 30)

>> If the Fan Motor is failure, replace it.

Test 4 : Check Compressor

Check Compressor.(SERVICE PARTS INFORMATION 9)

Test 5 : Replace Main PCB

If Test 1 - 4 do not improve the symptom, replace Main PCB. (SERVICE PARTS INFORMATION 10)

02-24

Trouble shooting 20 OUTDOOR UNIT Error Method:

Discharge Thermister Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : 71]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit Discharge pipe temperature thermistor

Detective details:

When Discharge pipe temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

12.30

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

-20

-4

158

8.70

292.91531.561013.11

-10 14

807060

176

6.27

194

10 50

100 110

212 230

3.434.60

2.60

12090

248

2.00

1048668

26.3440.0162.55100.91168.60

503020

122

17.79

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

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

BLACK

121

CN61

CN62

CN63

121

2 33 44

BLACK

BLACK BLACK

BLACK BLACK BLACK BLACK

If the voltage does not appear, replace Main PCB.

THERMISTOR ( OUTDOOR TEMP. )

THERMISTOR ( HEX OUT TEMP. )

THERMISTOR ( DISCHARGE TEMP. )

THERMISTOR ( COMP TEMP. )

02-25

Trouble shooting 21 OUTDOOR UNIT Error Method:

Compressor Thermister Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 2 time Flash

ERROR CODE : [E : 72]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit Compressor temperature thermistor

Detective details:

When Compressor temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

12.30

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

-20

-4

158

8.70

292.91531.561013.11

-10 14

807060

176

6.27

194

10 50

100 110

212 230

3.434.60

2.60

12090

248

2.00

1048668

26.3440.0162.55100.91168.60

503020

122

17.79

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

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

BLACK

121

CN61

CN62

CN63

121

2 33 44

BLACK

BLACK BLACK

BLACK BLACK BLACK BLACK

If the voltage does not appear, replace Main PCB.

THERMISTOR ( OUTDOOR TEMP. )

THERMISTOR ( HEX OUT TEMP. )

THERMISTOR ( DISCHARGE TEMP. )

THERMISTOR ( COMP TEMP. )

02-26

Trouble shooting 22 OUTDOOR UNIT Error Method:

Heat Ex. OUT Thermister Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 3 time Flash

ERROR CODE : [E : 73]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit Heat Ex. temperature thermistor

Detective details:

When Heat Ex. temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

1.19

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

-20

-4

158

0.84

-10

27.8150.3195.58

176

0.61

807060

10 50

1048668

2.533.845.989.6316.05

503020

122

1.71

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

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

BLACK

121

CN61

CN62

CN63

2 33

121

2 33

121

2 33 44

BLACK

BLACK BLACK

BLACK BLACK BLACK BLACK

If the voltage does not appear, replace Main PCB.

THERMISTOR ( OUTDOOR TEMP. )

THERMISTOR ( HEX OUT TEMP. )

THERMISTOR ( DISCHARGE TEMP. )

THERMISTOR ( COMP TEMP. )

02-27

Trouble shooting 23 OUTDOOR UNIT Error Method:

Outdoor Thermister Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 4 time Flash

ERROR CODE : [E : 74]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit Outdoor temperature thermistor

Detective details:

When Outdoor temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

2.36

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

-20

-4

158

1.65

-10

62.28115.24224.33

176

1.18

807060

10 50

1048668

5.187.9712.6420.7235.21

503020

122

3.45

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

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

BLACK

121

CN61

CN62

CN63

2 33

121

2 33

121

2 33 44

BLACK

BLACK BLACK

BLACK BLACK BLACK BLACK

If the voltage does not appear, replace Main PCB.

THERMISTOR ( OUTDOOR TEMP. )

THERMISTOR ( HEX OUT TEMP. )

THERMISTOR ( DISCHARGE TEMP. )

THERMISTOR ( COMP TEMP. )

02-28

Trouble shooting 24 OUTDOOR UNIT Error Method:

2-Way Valve Thermistor Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 6 time Flash

ERROR CODE : [E : 76]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit 2 Way valve temperature thermistor

Detective details:

When 2 Way valve temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

12.30

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

-20

-4

158

8.70

292.91531.561013.11

-10 14

807060

176

6.27

10 50

1048668

26.3440.0162.55100.91168.60

503020

122

17.79

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

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

For AOU36RLXFZH For AOU45RLXFZ

VALVE THERMISTOR A, B

2-WAY VALVE A 3-WAY VALVE A

2-WAY VALVE B

3-WAY VALVE B

CN64

11 22 33 44 55 66 77 88

BLACK BLACK BLACK BLACK BLACK BLACK BLACK BLACK

VALVE THERMISTOR C, D

BLACK

CN65

11 22 33 44 55 66 77

88 99

BLACK BLACK BLACK

BLACK BLACK BLACK BLACK

2-WAY VALVE C

3-WAY VALVE C 2-WAY VALVE D 3-WAY VALVE D

If the voltage does not appear, replace Main PCB.

CN64

CN65

CN66

BLACK

VALVE THERMISTOR A, B

2-WAY VALVE A 3-WAY VALVE A 2-WAY VALVE B 3-WAY VALVE B

VALVE THERMISTOR C, D

2-WAY VALVE C 3-WAY VALVE C

2-WAY VALVE D 3-WAY VALVE D

VALVE THERMISTOR E

2-WAY VALVE E 3-WAY VALVE E

02-29

Trouble shooting 25 OUTDOOR UNIT Error Method:

3-Way Valve Thermistor Error

Indicate of Display:

Indoor Unit Operation lamp : 7 time Flash Timer lamp: 6 time Flash

ERROR CODE : [E : 76]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB circuit 3 Way valve temperature thermistor

Detective details:

When 3 Way valve temperarture thermistor open or short-circuit is detected at power ON or while running the compressor.

Forecast of Cause:

1. Connector connection failure 2.Thermistor failure 3. Main PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature (°C) Temperature (°F) Resistance Value

(k )

-30

-22

Temperature (°C) Temperature (°F) Resistance Value

(k )

140

12.30

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

-20

-4

158

8.70

292.91531.561013.11

-10 14

807060

176

6.27

10 50

1048668

26.3440.0162.55100.91168.60

503020

122

17.79

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

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

For AOU36RLXFZH For AOU45RLXFZ

VALVE THERMISTOR A, B

2-WAY VALVE A 3-WAY VALVE A

2-WAY VALVE B

3-WAY VALVE B

CN64

11 22 33 44 55 66 77 88

BLACK BLACK BLACK BLACK BLACK BLACK BLACK BLACK

VALVE THERMISTOR C, D

BLACK

CN65

11 22 33 44 55 66 77

88 99

BLACK BLACK BLACK

BLACK BLACK BLACK BLACK

2-WAY VALVE C

3-WAY VALVE C 2-WAY VALVE D 3-WAY VALVE D

If the voltage does not appear, replace Main PCB.

CN64

CN65

CN66

BLACK

VALVE THERMISTOR A, B

2-WAY VALVE A 3-WAY VALVE A 2-WAY VALVE B 3-WAY VALVE B

VALVE THERMISTOR C, D

2-WAY VALVE C 3-WAY VALVE C

2-WAY VALVE D 3-WAY VALVE D

VALVE THERMISTOR E

2-WAY VALVE E 3-WAY VALVE E

02-30

Trouble shooting 26

OUTDOOR UNIT Error Method:

CT Error

Indicate of Display:

Indoor Unit Operation lamp : 8 time Flash Timer lamp: 4 time Flash

ERROR CODE : [E : 84]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators: Detective details:

Outdoor unit main PCB When Input Current Sensor has detected 0A, while Inverter Compressor is

operating at higher than 60 rps, after 1 minutes upon starting the Compressor. ( Except during the defrost operation )

Forecast of Cause:

1. Defective connection of electric components 2. External cause 3. Main PCB failure

Test 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

Test 2 : Check connections of Outdoor Unit

Electrical Components

Check if the terminal connection is loose. Check if connector is removed. Check erroneous connection. Check if cable is open.

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

Test 4 : Replace Main PCB

If Test 1, 2 do not improve the symptom, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

Test 1-2 :

Check external cause at Indoor and Outdoor

( Voltage drop or Noise )

Instant drop : Check if there is a large load electric apparatus in the same circuit.

Momentary power failure : Check if there is a defective contact or leak current in the power supply circuit.

Noise : Check if there is any equipment causing harmonic wave near electric line.(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

02-31

Trouble shooting 27

OUTDOOR UNIT Error Method:

Discharge Pressure Sensor Error

Indicate of Display:

Indoor Unit Operation lamp : 8 time Flash Timer lamp: 6 time Flash

ERROR CODE : [E : 86]

Detective Actuators: Detective details:

Discharge pressure sensor

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

・

sensor error is generated.

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

30 seconds or more have elapsed since the outdoor unit power was turned on and pressure sensor detected value > 5.0V was detected.

Forecast of Cause:

1. Discharge pressure sensor connector disconnection, open eruliaf rosnes erusserp egrahcsiD .2

3. Main PCB failure

Test 1 : Check the discharge pressure sensor connection state

Connector connection state check Cable open check

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 2 : Check the discharge pressure sensor

Sensor characteristics check *For the characteristics of the discharge pressure sensor,

refer to the (SERVICE PARTS INFORMATION 6).

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

Main PCB (CN92:1-2) voltage value = 5V

Remove the PRESSURE SENSOR from Main PCB, check the voltage.

RED

WHITE

CN92

BLACK

Discharge pressure sensor (CN92:1-2)

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

PRESSURE SENSOR

02-32

Trouble shooting 28

OUTDOOR UNIT Error Method:

Over Current Error

Indicate of Display:

Indoor Unit Operation lamp : 9 time Flash Timer lamp: 4 time Flash

ERROR CODE : [E : 94]

Outdoor Unit

Detective Actuators: Detective details:

Outdoor unit main PCB circuit Compressor

“Protection stop by overcurrent generation after inverter compressor start processing completed” generated consecutively 5 times.

* The number of generations is reset if the start-up of the compressor succeeds.

Forecast of Cause:

1. Outdoor Heat Exchanger clogged 2. Outdoor Fan Operation failure 3. Main PCB

4. Inverter compressor failure (lock, winding short)

Test 1 : Check ambient temp. around motor,Heat Exchanger

Check excessively high temperature around the motor. (If there is any surrounding equipment that causes heat) Is there anything obstructing the air distribution circuit? Is there any clogging of Outdoor Heat Exchanger?

>>Upon the temperature coming down, restart operation.

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 2 : Check Outdoor Fan

Is the Fan rotating by hand when operation is off?

>> If the Fan Motor is locked, replace it.

Test 3 : Replace Main PCB

If Test 1 - 2 do not improve the symptom, change Main PCB.

Test 4 : Replace Compressor

If Test 3 do not improve the symptom, change Compressor.

02-33

Trouble shooting 29

OUTDOOR UNIT Error Method:

Compresor Control Error

Indicate of Display:

Indoor Unit Operation lamp : 9 time Flash Timer lamp: 5 time Flash

ERROR CODE : [E : 95]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB Compressor

Detective details:

While running the compressor, if the detected rotor location is out of phase with actual rotor location more than 105°, the compressor stops.

After the compressor restarts, if the same operation is repeated within 40 sec,the compressor stops again.

If and repeats 5 times, the compressor stops permanently.

Forecast of Cause:

1. Defective connection of electric components 2. Main PCB failure 3. Compressor failure

Test 1 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

Check if connector is removed. Check erroneous connection. Check if cable is open.

(SERVICE PARTS INFORMATION 2) >>Upon correcting the removed connector or miss-wiring, reset the power.

Test 2 : Replace Main PCB

If Test 1 do not improve the symptom, change Main PCB. (SERVICE PARTS INFORMATION 10)

Test 3 : Replace Compressor

If Test 2 do not improve the symptom, change Compressor.

02-34

Trouble shooting 30

OUTDOOR UNIT Error Method:

Outdoor Unit Fan Motor Error

Indicate of Display:

Indoor Unit Operation lamp : 9 time Flash Timer lamp: 7 time Flash

ERROR CODE : [E : 97]

Detective Actuators: Detective details:

Outdoor unit main PCB circuit Outdoor unit fan motor

When outdoor unit fan rotation speed is less than 100 rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60 sec is repeated 3 times in a row, compressor and fan motor stops. If and repeats 5 times in a row, compressor and fan motor stops permanently.

Forecast of Cause:

1. Fan rotation failure 2. Motor protection by surrounding temperature rise 3. Main PCB failure

4. Outdoor unit fan motor failure

Test 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.

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Test 2 : 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.

Test 3 : Check Outdoor unit fan motor

Check Outdoor unit fan motor. (PARTS INFORMATION 6)

>>If Outdoor Fan Motor is abnormal, replace Outdoor fan motor and Main PCB.

Test 4 : Check Output Voltage of Main PCB

Check outdoor unit circuit diagram and the voltage. (Measure at Main PCB side connector)

RED

CN243

2 3 4 5 6 7

1 2 3

BLACK

WHITE

YELLOW

BROWN

FAN MOTOR

If the voltage is not correct, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

Read wire DC voltage Red - Black

White - Black

260 - 400V

15 1.5V

02-35

Trouble shooting 31 OUTDOOR UNIT Error Method:

4-Way Valve Error

Indicate of Display:

Indoor Unit Operation lamp : 9 time Flash Timer lamp: 9 time Flash

ERROR CODE : [E : 99]

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Indoor unit main PCB Heat Ex. temperature thermistor Room temperature thermistor 4-Way valve

Detective details:

When the indoor unit Heat Ex. temperatrure is compared with the room temperature, and either following condition is detected continuously 2 times, compressor stops.

Cooling operation・ [Indoor Heat Ex. temperature] - [Room temperature] > 20°F(10°C)

・

Heating operation [Indoor Heat Ex. temperature] - [Room temperature] < -20°F(-10°C)

If the same operation is repeated 5 times. the compressor stops permanently.

Forecast of Cause:

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

5. Main PCB failure 6. Controller PCB failure

Test 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 miss-wiring, reset the power.

Test 2 : Check thermistor of Indoor unit

Isn’t it fallen off the holder? Is there a cable pinched?

>> Check characteristics of thermistor, (Refer to Trouble shooting 7,8), If defective, replace the thermistor.

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

[ Solenoid coil ]

Remove CN202 from PCB and check the resistance value of coil. Resistance value is about 2085 +10% (68°F(20°C))

>> If it is Open or abnormalresistance 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.

Test 4 : Check the voltage of 4-way valve

Check the CN202 voltage of Main PCB

Check if AC187V(AC208V-10%) - 253V(AC230V+10%) appears at CN 202 of Main PCB.

[ Heating operation ]

>> If it is not voltage, Replace Main PCB.

[ Cooling operation ]

>> If it is voltage, Replace Main PCB.

OKOK

Test 5 : Replace Controller PCB

If Test 1- 4 do not improve the symptom, replace Controller PCB of Indoor unit .

(SERVICE PARTS INFORMATION 10)

02-36

Trouble shooting 32 OUTDOOR UNIT Error Method:

Coil (expansion valve ) Error

Indicate of Display:

Indoor Unit

Operation lamp : 9 time Flash Timer lamp

ERROR CODE : [E : 9A]

: 10 time Flash

Outdoor Unit

ABCDEF

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

EEV Coil

Detective details:

Coil (Expansion valve) driver circuit open detected.

Main PCB

Forecast of Cause:

1. EEV coil loose connection 2. EEV wires cut or pinched.

3. Defective EEV coil 4. Main PCB (DC12V) output abnormal

Test 1 : Check the connection of EEV connector

Check if the connector is loose connection or not.

Test 2 : Check the EEV wire

Check if the wire of EEV has damage or not. (Slash, Braking of wire, Pinching, etc.)

Test 3 : Check the EEV Coil

Check if the circuit of EEV coil winding is good or not. (Refer to the service parts information 3)

Replace EEV Coil

Test 4 : Check the output of EEV on the Main PCB

Check if the DC12V is on between the Pin No.1 of CN111-115 and GND Pin. (Disconnect the wire of EEV when you check the output of EEV)

Replace Main PCB

(SERVICE PARTS INFORMATION 10)

Test 5 : Noise, momentary open, voltage drop

Check if temporary voltage drop was not generated. Check if momentary open was not generated. Check if ground is connection correctly or there are no related cables near the power line.

02-37

Trouble shooting 33 OUTDOOR UNIT Error Method:

Discharge Temperature Error

Indicate of Display:

Indoor Unit Operation lamp : 10 time Flash Timer lamp: 1 time Flash

ERROR CODE : [E : A1]

Outdoor Unit

ABCDEF

110

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Outdoor unit main PCB Discharge pipe temperature thermistor

Forecast of Cause:

1. 3-way valve not opened 2. EEV defective, strainer clogged

3. Outdoor unit operation failure, foreign matter on heat exchanger 4. Discharge temperature thermistor failure

5. Insufficient refrigerant 6. Main PCB failure

Test 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.

Test 2 : Check the EEV, strainer

EEV open? Strainer clogging check

(SERVICE PARTS INFORMATION 3)

Detective details:

Protection stop by Discharge pipe temperature thermistor > 230°F(110°C)

during compressor operation generated 2 times within 24 hours.

Test 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.

Test 2 : Check the EEV, strainer

EEV open? Strainer clogging check

(SERVICE PARTS INFORMATION 3)

Test 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 (SERVICE PARTS INFORMATION 6)

Test 4 : Check the discharge thermistor

Discharger thermistor characteristics check. (Check by disconnecting thermistor from PCB.)

* For the characteristics of the thermistor, refer to the "Trouble shooting 20".

Test 5 : Check the refrigerant amount

Leak check

02-38

Trouble shooting 34 OUTDOOR UNIT Error Method:

Compressor Temperature Error

Indicate of Display:

Indoor Unit Operation lamp : 10 time Flash Timer lamp: 3 time Flash

ERROR CODE : [E : A3]

Outdoor Unit

ABCDEF

110

: Light ON : Light OFF n : n time blinking

Monitor

Detective Actuators:

Compressor temperature thermistor

Forecast of Cause:

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 6. Main PCB failure

Test 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.

Test 2 : Check the EEV, strainer

EEV open? Strainer clogging check

(SERVICE PARTS INFORMATION 3)

Detective details:

Protection stop by Compressor temperature thermistor > 226.4°F(108°C)

during compressor operation generated 2 times within 24 hours.

Test 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.

Test 2 : Check the EEV, strainer

EEV open? Strainer clogging check

(SERVICE PARTS INFORMATION 3)

Test 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 (SERVICE PARTS INFORMATION 6)

Test 4 : Check the compressor thermistor

Compressor thermistor characteristics check. (Check by disconnecting thermistor from PCB.)

* For the characteristics of the thermistor, refer to the "Trouble shooting 21".

Test 5 : Check the refrigerant amount

Leak check

02-38

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Trouble shooting 35

Indoor unit - No Power

Forecast of Cause :

1. Power supply failure.

2. External cause.

3. Electrical components defective.

Test 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

>>If abnormal condition is found, correct it by referring to Installation Manual or Data & Technical Manual.

Test 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

Instant drop ----- Check if there is a large load electric apparatus in the same circuit. Momentary power failure ----- Check if there is a defective contact or leak current in the power supply circuit. Noise ----- Check if there is any equipment causing harmonic wave near electric line.

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Test 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC187 - 253V appears at Outdoor Unit Terminal L1 - L2.

YES

Check Fuse of between of Terminal and Filter PCB.

>> If Fuse is open, check if the wiring between Terminal and Filter PCB is loose, and replace Fuse.

Check Varistor in Filter PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply.

Check the correct power supply and replace Varistor. Upon checking the normal power supply, replace Varistor.

Test 4 : Replace Filter PCB

If Test 1- 3 do not improve the symptom, replace Filter PCB.

02-40

Trouble shooting 36

Outdoor unit - No Power

Forecast of Cause :

1. Power supply failure.

2. External cause.

3. Electrical components defective.

Test 1 : Check Installation Condition

Isn’t the breaker down? Check loose or removed connection cable.

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

to Installation Manual or Data & Technical Manual.

Test 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Test 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC187 - 253V appears at Outdoor Unit Terminal L1 - L2.

YES

Check Fuse in Main PCB.

>> If Fuse is open, check if the wiring between Terminal and Main PCB is loose, and replace Fuse.

YES

Check Active Filter Module. (PARTS INFORMATION 8)

>> If Active Filter Module is abnormal, replace it.

Test 4 : Replace Main PCB

If Test 1- 3 do not improve the symptom, replace Main PCB. (SERVICE PARTS INFORMATION 10)

02-41

Trouble shooting 37

No Operation (Power is ON)

Forecast of Cause :

1. Setting / Connection failure.

2. External cause.

3. Electrical components defective.

Test 1 : Check indoor and outdoor installation condition

Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control. Or, check if there is an open cable connection. Are these Indoor unit, Outdoor unit, and Remote control suitable model numbers to connect?

>> If there is some abnormal condition, correct it by referring to Installation manual and Data & Technical Manual.

Turn off Power and check/ correct followings.

Is there loose or removed communication line of Indoor unit and Outdoor unit?

Test 2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

(Neon bulb or electric equipment that may cause harmonic wave) Check the complete insulation of grounding.

Test 3 : Check Wired Remote Controller and Controller PCB

Check Voltage at terminal 1-3 of Controller PCB or Communication PCB. (Power supply to Remote Control) Compact Cassette, Slim Duct Type : CN14 Wall Mount , Floor Type : CN16 Compact Wall Mount Type : CNC01(UTY-XCBXZ2)

>> If it is DC12V, Remote Control is failure. (Controller PCB is normal) >> Replace Remote Control >> If it is DC 0V, Controller PCB is failure. (Check Remote Control once again)

>> Check Indoor unit fan motor. (SERVICE PARTS INFORMATION 5)

If it is normal, replace Controller PCB. If it is abnormal, replace Indoor unit fan motor and Controller PCB.

>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit. (SERVICE PARTS INFORMATION 10)

02-42

Trouble shooting 38

Forecast of Cause :

No Cooling / No Heating

Test 1 : Check Indoor Unit

Does Indoor unit FAN run on HIGH FAN?

Is Air filter dirty? Is Heat exchanger clogged? Check if Energy save function is operated.

OKOK

Test 2 : Check Outdoor Unit Operation

Check if Outdoor unit is operating

Check any objects that obstruct the air flow route. Check clogged Heat exchanger.

Is the Valve open?

1. Indoor / Outdoor unit error.

2. Effect by surroudingding environment.

3. Connection pipe / Connection wire failure

4. Refrigeration cycle failure.

Test 3 : Check Site Condition

Is capacity of Indoor unit fitted to Room size? Any windows open? Or direct sunlight ?

Test 4 : Check Indoor/ Outdoor Installation Condition

Check connection pipe (specified pipe length & Pipe diameter?)

Check any loose or removed communication line.

>> If there is an abnormal condition, correct it by referring to Installation Manual or Data & Technical Manual.

PSI

Test 5 : Check Refrigeration Cycle

Check if Strainer is clogged (Refer to the figure at right).

Measure Gas Pressure and if there is a leakage, correct it.

>> When recharging the refrigerant, make sure to perform

vacuuming, and recharge the specified amount.

Check EEV (SERVICE PARTS INFORMATION 3) Check Compressor (SERVICE PARTS INFORMATION 1,2) Check Heater unit (SERVICE PARTS INFORMATION 7)

Attention

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference like shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (In) Pipe (Out)

PSI

Pipe (In) Pipe (Out)

䐠

䐟

02-43

Trouble shooting 39

Abnormal Noise

Forecast of Cause :

1. Abnormal installation (Indoor / Outdoor unit).

2. Fan failure (Indoor / Outdoor unit).

3. Compressor failure (Ourdoor unit).

Diagnosis method when Abnormal Noise is occurred

Abnormal noise is coming from Indoor unit.

(Check and correct followings)

Abnormal noise is coming from Outdoor unit. (Check and correct followings)

Is Main Unit installed in stable condition?

Is the installation of Air suction grille and

front panel normal?

Is Fan broken or deformed? Is the screw of Fan loose? Is there any object which obstruct the Fan rotation?

Trouble shooting 40

Forecast of Cause :

Water Leaking

Is Main Unit installed in stable condition? Is Fan Guard installed normally?

Is Fan broken or deformed? Is the screw of Fan loose?

Is there any object which obstruct the Fan rotation?

Check if vibration noise by loose bolt or contact noise of piping is happening.

Is Compressor locked?

>> Check Compressor

(SERVICE PARTS INFORMATION 1,2)

1. Erroneous installation.

2. Drain hose failure.

Diagnosis method when water leak occurs

Is Main unit installed in stable condition? Is Main unit broken or deformed at the time of transportation or maintenance?

Is Drain hose connection loose? Is there a trap in Drain hose? Is Drain Hose clogged?

Is Fan rotating?

02-44

Diagnosis method when water is spitting out.

Is the filter clogged?

PSI

Check Gas pressure and correct it if there was a gas leak.

PSI

Trouble shooting 41

Too Warm

Forecast of Cause :

1. House insulation setting has not been changed.

2. Temperature sensing location has not been changed.

3. Installation location of the wired remote.

4. Function settings have not been changed.

Test 1 : Check insulation level of structure of house

Is insulation level greater than R-13.

Too warm

Test 2 : Verity room temperature sensing location

Do you want room temperature sensed at the wired remote controller (Wired remote sensor) or by they build in sensor inside the unit (Indoor unit sensor).

“Indoor unit sensor”

Test3 : Check the remote controller display

Test 1-1 : Check Function Setting

YES

If insulation level is greater than R-13 set function

95 to 01.

Ref.)

Setting Value

※

Please reference the APPENDING DATA

00 01

Setting DescriptionFunction Number

Standard insulation

High insulation

Test 1-2 : Check effects of Function Setting change

Is the space still too warm in relation to set point.

“Wired remote sensor”

TO NEXT PAGE

Test 3-1 : Check the remote controller



Is the "Thermo Sensor Icon" displayed on the screen?

Test 4 : Check Function Settings

Using the table on the right adjust function 31. (Room Temperature Control for indoor unit sensor)

※

Please reference the APPENDING DATA

Hold down the THERMO SENSOR button until the thermo sensor icon is turned off.

YES



Too warm

Setting Value

00 01

02 03 04 05 06 07 08 09

No correction 0.0°F (0.0°C)

02-45

Ref.)

(For heating)

Setting DescriptionFunction Number

Standard setting

-1°F (-0.5°C)

-2°F (-1.0°C)

-3°F (-1.5°C)

-4°F (-2.0°C)

-5°F (-2.5°C)

-6°F (-3.0°C)

-7°F (-3.5°C)

-8°F (-4.0°C)

Less

Heating

“Wired remote sensor”

Test 3 : Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

YES

Too warm

Test 4 : Check the Function Setting

Is function 48 (Room temperature sensor switching) set to 01?

YES

Too warm

Test 3-1 : Check Function Setting

Is function 42 (Indoor room temperature sensor switching function) set to 01? Ref.)

Setting DescriptionFunction Number Setting Value

※

Please reference the APPENDING DATA

00 01

Indoor unit

Both

Test 3-2 : Check the remote controller

Press and hold down the THERMO SENSOR button to turn on the icon.

Test 4-1 : Check the Function Setting

Change setting of function 48 (Room temperature sensor switching) to 01.

Ref.)

Setting DescriptionFunction Number Setting Value

※

Please reference the APPENDING DATA

00 01

Both

Wired remote controller

Test 4-2 : Check the effects of Function Setting change

Did this function setting improve temperature control?

Test 5 : Location of the remote controller

Is the mounting location of the wired remote controller affecting the temperature sensing? (Sunlight on the remote, heat source next to the remote)

Test 6 : Check Function Setting

Using the table on the right adjust temperature correction by changing function setting 93. (Room Temperature control for wired remote controller sensor)

※

Please reference the APPENDING DATA

YES

02-46

Test 5-1 : Location of the remote controller

Move the remote controller.

Too war m

Ref.)

Setting DescriptionFunction Number Setting Value

No correction 0.0°F (0.0°C) No correction 0.0°F (0.0°C)

(For heating)

10 11 12 13 14 15 16 17

+1°F (+0.5°C) +2°F (+1.0°C) +3°F (+1.5°C) +4°F (+2.0°C) +5°F (+2.5°C) +6°F (+3.0°C) +7°F (+3.5°C)

+8°F (+4.0°C)

Less

Heating

Trouble shooting 42

Too Cool

Forecast of Cause :

1. House insulation setting has not been changed.

2. Temperature sensing location has not been changed.

3. Installation location of the wired remote.

4. Function settings have not been changed.

Test 1 : Check insulation level of structure of house

Is insulation level greater than R-13.

Too cool

Test 2 : Verity room temperature sensing location

Do you want room temperature sensed at the wired remote controller (Wired remote sensor) or by they build in sensor inside the unit (Indoor unit sensor).

“Indoor unit sensor”

Test3 : Check the remote controller display

Test 1-1 : Check Function Setting

YES

If insulation level is greater than R-13 set function

95 to 01.

Ref.)

Setting Value

※

Please reference the APPENDING DATA

00 01

Setting DescriptionFunction Number

Standard insulation

High insulation

Test 1-2 : Check effects of Function Setting change

Is the space still too warm in relation to set point.

“Wired remote sensor”

TO NEXT PAGE

Test 3-1 : Check the remote controller



Is the "Thermo Sensor Icon" displayed on the screen?

Test 4 : Check Function Settings

Using the table on the right adjust function 30. (Room Temperature Control for indoor unit sensor)

※

Please reference the APPENDING DATA

Hold down the THERMO SENSOR button until the thermo sensor icon is turned off.

YES



Too cool

Setting Value

00 01

10 11 12 13 14 15 16 17

No correction 0.0°F (0.0°C)

02-47

Ref.)

(For cooling)

Setting DescriptionFunction Number

Standard setting

+1°F (+0.5°C) +2°F (+1.0°C) +3°F (+1.5°C) +4°F (+2.0°C) +5°F (+2.5°C) +6°F (+3.0°C) +7°F (+3.5°C)

+8°F (+4.0°C)

Less

Cooling

“Wired remote sensor”

Test 3 : Check the remote controller display

Is the "Thermo Sensor Icon" displayed on the screen?

YES

Too cool

Test 4 : Check the Function Setting

Is function 48 (Room temperature sensor switching) set to 01?

YES

Too cool

Test 3-1 : Check Function Setting

Is function 42 (Indoor room temperature sensor switching function) set to 01? Ref.)

Setting DescriptionFunction Number Setting Value

※

Please reference the APPENDING DATA

00 01

Indoor unit

Both

Test 3-2 : Check the remote controller

Press and hold down the THERMO SENSOR button to turn on the icon.

Test 4-1 : Check the Function Setting

Change setting of function 48 (Room temperature sensor switching) to 01.

Ref.)

Setting DescriptionFunction Number Setting Value

※

Please reference the APPENDING DATA

00 01

Both

Wired remote controller

Test 4-2 : Check the effects of Function Setting change

Did this function setting improve temperature control?

Test 5 : Location of the remote controller

Is the mounting location of the wired remote controller affecting the temperature sensing? (Sunlight on the remote, heat source next to the remote)

Test 6 : Check Function Setting

Using the table on the right adjust temperature correction by changing function setting 92. (Room Temperature control for wired remote controller sensor)

※

Please reference the APPENDING DATA

YES

02-48

Test 5-1 : Location of the remote controller

Move the remote controller.

Too cool

Ref.)

Setting DescriptionFunction Number Setting Value

No correction 0.0°F (0.0°C) No correction 0.0°F (0.0°C)

(For cooling)

10 11 12 13 14 15 16 17

+1°F (+0.5°C) +2°F (+1.0°C) +3°F (+1.5°C) +4°F (+2.0°C) +5°F (+2.5°C) +6°F (+3.0°C) +7°F (+3.5°C)

+8°F (+4.0°C)

Less

Cooling

2-4 SERVICE PARTS INFORMATION

SERVICE PARTS INFORMATION 1

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 Filter PCB, Main PCB, connection of Compressor,and winding resistance. (Refer to the next page).

>> If there is no failure, the defect of Compressor is considered (Locked compressor due to clogged 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)

PSI

Abnormal noise

Check if vibration noise by loose bolt or contact noise of piping is happening.

Defective Compressor can be considered. (due to inside dirt clogging or broken component)

Replace Compressor

Check if Strainer is clogged. (

PARTS INFORMATION 3)

Check Filter PCB, Main 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.)

Replace Compressor

02-49

SERVICE PARTS INFORMATION 2

Compressor

Test 1 : Check Connection

Check terminal connection of Compressor (loose or incorrect wiring)

V(S)

(WHITE)

Main PCB

W (T)

(BLACK)

U(R)

(RED)

Test 2 : Check Winding Resistance

Check winding resistance of each terminal

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

U(R)

Check terminal connection of Main PCB (loose or incorrect wiring)

Main PCB

RED

TM403

TM404

Compressor

TM405

BLACK

WHITE

W (T)

V(S)

Test 3 : Replace Main PCB

If the symptom does not change with above Check 1, 2, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

Resistance Value : 0.642 + 8% (68°F(20°C))

02-50

SERVICE PARTS INFORMATION 3

Outdoor unit electronic expansion valve (EEV)

Test 1 : Check Connections

Check connection of connector ( Loose connector or open cable )

For AOU36RLXFZH For AOU45RLXFZ

CN111

CN112

CN113

CN114

1 2

3 4 5

3 4 5 66

RED

BLUE

ORANGE

YELLOW

WHITE

RED

BLUE

ORANGE

YELLOW

WHITE

RED

1 2

BLUE

ORANGE

YELLOW

WHITE

RED

1 2

BLUE

ORANGE

YELLOW

WHITE

EXPANSION

VALVE COIL A

EXPANSION

VALVE COIL B

EXPANSION

VALVE COIL C

EXPANSION

VALVE COIL D

CN111

CN112

CN113

CN114

CN115

1 2 3 4 5

1 2 3 4 5 66

1 2 3 4 5 66 77

RED

BLUE

ORANGE

YELLOW

WHITE

RED

BLUE

ORANGE

YELLOW

WHITE

RED

1 2

BLUE

ORANGE

YELLOW

WHITE

RED

1 2

BLUE

ORANGE

YELLOW

WHITE

RED

1 2 3

BLUE

ORANGE

YELLOW WHITE

EXPANSION

VALVE COIL A

EXPANSION

VALVE COIL B

EXPANSION

VALVE COIL C

EXPANSION

VALVE COIL D

EXPANSION

VALVE COIL E

02-51

Test 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

Read wire

Resistance value White - Red Yellow - Blue

Orange - Red

at 68°F(20°C)

Blue - Orange

If Resistance value is abnormal, replace EEV.

Test 3 : Check Voltage from Main PCB.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Test 4 : Check Noise at start up

Turn on Power and check operation noise.

If an abnormal noise does not show, replace Main PCB.

(SERVICE PARTS INFORMATION 10)

Test 5 : Check Opening and Closing Operation of Valve

When Valve is closed, it has a temp. difference between Inlet and Outlet.

CLOSE Example : Hot Gas

If it is open, it has no temp. difference between Inlet and Outlet.

OPEN Example : Hot Gas

Pipe (In)

Hi TEMP.

Test 6 : Check Strainer

Strainer normally does not have temperature difference between inlet and outlet as shown in , but if there is a difference as shown in , there is a possibility of inside clogged. In this case, replace Strainer.

Pipe (Out)

Normal TEMP.

)tuO( epiP)nI( epiP

Pipe (In)

Hi TEMP.

Pipe (Out)

Hi TEMP.

)tuO( epiP)nI( epiP

02-52

SERVICE PARTS INFORMATION 4

Discharge pressure sensor

Test 1 : Check the voltage from Main PCB

With the connector connected to the Main PCB, measure the voltage between CN 92 : 1 - 2 of the Main PCB

CN92

Characteristics of pressure sensor

4.5

Output [DCV]

0.5 0

Pressure [MPa]

5.0

1 2

RED WHITE BLACK

PS Discharge pressure sensor

02-53

SERVICE PARTS INFORMATION 5

Indoor unit fan motor

Test 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.

Test 2 : Check resistance of Indoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Ground terminal)

>>If they are short-circuited (below 300 k ), replace Indoor fan motor and Controller PCB.

For Compact Wall Mount, Wall Mount Type

Pin number (wire color)

1 (Blue) 2 (Yellow) 3 (White) 4 (Black) 5 6 (Red)

Terminal function (symbol)

Feed back (FG) Speed command (Vsp) Control voltage (Vcc) Ground terminal (GND) No function DC voltage (Vm)

For Compact Cassette Type

Pin number (wire color)

1 (Red) 2

3 (White) 4 (Black)

5 No function 6 7 (Yellow) 8 (Brown) Feed back (FG)

Terminal function (symbol)

DC voltage (Vm) No function Control voltage (Vcc) Ground terminal (GND)

No function Speed command (Vsp)

For Floor Type

Pin number (wire color)

1 (Blue) 2 (Yellow) 3 (White) 4 (Black) 5 6 No function 7 (Red)

Feed back (FG) Speed command (Vsp) Control voltage (Vcc) Ground terminal (GND) No function

DC voltage (Vm)

For Slim Duct Type

Pin number (wire color)

1 (Blue) 2 (Yellow) 3 (White) 4 (Black) 5 6 (Red)

Feed back (FG) Speed command (Vsp) Control voltage (Vcc) Ground terminal (GND) No function

DC voltage (Vm)

Terminal function (symbol)

02-54

SERVICE PARTS INFORMATION 6

Outdoor unit fan motor

Test 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.

Test 2 : Check resistance of Outdoor Fan Motor

Refer to below. Circuit-test "Vm" and "GND" terminal. (Vm: DC voltage, GND: Ground terminal)

>>If they are short-circuited (below 300 k ), replace Outdoor fan motor and Main PCB.

(SERVICE PARTS INFORMATION 10)

Pin number (wire color)

1 (Red) 2 3 No function

4 (Black) 5 (White) 6 (Yellow) 7 (Brown)

Terminal function (symbol)

DC voltage (Vm) No function

Ground terminal (GND) Control voltage (Vcc) Speed command (Vsp) Feed back (FG)

02-55

For AOU36RLXFZH

ERVICE PARTS INFORMATION 7

Heater unit

Test 1 : Check Connections

Check connection of connector ( Loose connector or open cable )

WHITE

BLACK

1234 1234

HEATER

THERMOSTAT

CN206

Test 2 : Check electrical components

Check Check Fuses.

>> If Fuse is open, check connection, and replace Fuse.

Test 3 : Check Heater wire.

Remove connector, check resistance of Heater wire.

eulav ecnatsiseR eriw daeR

Black - White

If Resistance value is abnormal, replace Heater Unit.

320.7 - 367.3

at 77°F (25°C)

02-56

SERVICE PARTS INFORMATION 8

Active filter module

Test 1 : Check Open or Short-circuit and Diode (D1)

Remove connector, check the open or short-circuit and the diode in the module Check the open or short-circuit Table.1 Each type standard value

Terminal

multimeter (+)

multimeter (-)

Type A Type B

SACT32010 [ HITACHI ] LACT33020 [ HITACHI ]

PM-601 [ FGEL ]

LOT No. - 1302931395

Resistance value

PM-604 [ FGEL ] PM-703 [ FGEL ]

PM-601 [ FGEL ]

LOT No. 1302931396 -

LOT No. of PM-601 [ FGEL ] type

Label position

※

+ (+IN)*

- ( -IN)*

L1 , L2

- ( -IN)*

N1 (N)

+ (+IN)*

N1 (N)*

Control Box

N1 (N)*

360k

720k

1.01M /

(Ref. value 1)

360k

1.65M /

(Ref. value 1)

20%

0.76M

(Ref. value 2)

20%

1.14M

(Ref. value 2)

1.01M /

(Ref. value 1)

* ( ) is FGEL terminal name.

Table.2 Standard value is changed by the tool specification (Type A and B are the same value)

Terminal

multimeter (-)

multimeter (+)

※

By kind of multimeter , the value may change significantly.

※

Ref. value 1 Specifications for Multimeter Manufacturer : FLUKE Model name : FLUKE11 Power source : DC9V.

Resistance value

1.32M /

(Ref. value 1)

1.01M /

(Ref. value 1)

0.66M

(Ref. value 2)

0.76M

(Ref. value 2)

Ref. value 2 Specifications for Multimeter Manufacturer : SANWA Model name : PM3 Power source : DC3V.

360k

900k

540k

1.65M /

(Ref. value 1)

20%

0.76M

(Ref. value 2)

20%

1.14M

(Ref. value 2)

Label

Model name

+ (+IN)*

- ( -IN)*

Lot No.(10 figures)

L2L1

N1 (N)*

If it is abnormal,replace ACTIVE FILTER MODULE

Test 2 : Check the Output DC voltage (between P and N)

Check the Output DC voltage (between P and N) of compressor stopping and operating.

>> 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

02-57

SERVICE PARTS INFORMATION 9

IPM

(Mounted on Transistor PCB)

Test 1 : Check the Transistor of PCB ( for Resistance )

Disconnect the connection wires between the Transistor PCB - Capacitor PCB and Transistor PCB - Inverter Compressor.

Set the tester to the "Resistance" mode, and measure the resistance between the following terminals.

IC400-30 (P) - TM403(U) / TM404(V) / TM405(W) IC400-24 (N) - TM403(U) / TM404(V) / TM405(W)

Judge the result of as follows:

Terminal

Tester(+) Tester(-)

P P P U V W N N N U V W

U V W P P P U V W N N N

Resistance value

Over 2k (Including )

Over 20k (Including )

Over 2k (Including )

Test 2 : Check the Transistor of PCB ( for Diode )

Set the tester to the "Diode" mode, and measure the voltage value between the following terminals.

Judge the result of as follows:

Terminal

Tester(+) Tester(-)

P P P U V W N N N U V W

U V W P P P U V W N N N

Tester display

0.3V 0.7V

02-58

SERVICE PARTS INFORMATION 10

CAUTION of if the replace Main PCB(Outdoor unit)

CAUTION

If you are replace the Main PCB of the outdoor unit, please do the following things! After the replaced Main PCB, normal operation is not possibility.

Test 1 : Check the SERVICE LAVEL of the outdoor unit

Repair history have been described on the service label?

(refer to Fig.1)

Test 2 : Check the LED of the Main PCB

Is LED lights on the Main PCB?

YES

Test 3 : Replace Main PCB

Replace Main PCB.

After the Main PCB replaced, Please make sure the cool air comes out by TEST RUN(cooling) operation.

After the Main PCB replaced,

CHECK RUN operation again,

please do the automatic correction.

YES

Test 3 : Re-display CHECK RUN result

IIs the wiring there is a mistake?

(refer to Fig.2)

YES

Test 4 : Replace Main PCB

Replace Main PCB.

Test 2 : It is automatic correction by CHECK RUN operation.

Replace Main PCB.

After the Main PCB replaced, CHECK RUN operation again, please do the automatic correction.

After the Main PCB replaced, Please Correct the wiring by Repair history.

Example ) when the 4 indoor units are connected

Fig.1 : SERVICE LAVEL

Repair history (Ex.)

Reverse connection of Terminal B and Terminal C.

Fig.2 : Display of CHECK RUN operation

Check results (Ex.)

ERROR

POWER

MODE

MONITOR

(7 sec.)

(2-blink)

(7 sec.)

Reverse connection of Terminal B and Terminal C.

01-59

FEDC

3-3-17,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan

May. 2016 Printed in Japan

Fujitsu AGU15RLF, ASU12RLF1, AGU12RLF, ASU24RLF, AUU7RLF Service Instructions Manual

Specifications and Main Features

Frequently Asked Questions

User Manual