Fujitsu ABF18LAT, ABF14LAT, ABF24LAT, AR 9LUAB, AR*12LUAD Service Instruction

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Page 1

Models Indoor unit Outdoor unit

AB*14LBAJ AB*18LBAJ AB*24LBAJ AB*F14LAT AB*F18LAT AB*F24LAT

AR* 9LUAB AR*12LUAD AR*14LUAD AR*18LUAD AR*22LUAD AR*F09LALU AR*F12LALU AR*F14LALU AR*F18LALU AR*F22LALU

AO*18LMAK2 AO*24LMAM2 AO*30LMAW4

SERVICE

INSTRUCTION

R410A

AU*12LBAB AU*14LBAB AU*18LBAB AU*F09LAL AU*F12LAL AU*F14LAL AU*F18LAL

AS*18LBAJ AS*24LBAJ AS* 7LMACW AS* 9LMACW AS*12LMACW AS*A07LACM AS*A09LACM AS*A12LACM AS*A14LACM AS*A18LACM

AG*F09LAC AG*F12LAC AG*F14LAC

SPLIT TYPE ROOM AIR CONDITIONER

INVERTER MULTI

Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type

Page 2

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

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

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

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

5. LOUVER CONTROL...................................................................................................

4. OUTDOOR FAN CONTROL.......................................................................................

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

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

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

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

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

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

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

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

15. FRESH AIR CONTROL..............................................................................................

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

18. DEFROST OPERATION CONTROL..........................................................................

16. EXTERNAL ELECTRICAL HEATER CONTROL........................................................

19. DRAIN PUMP OPERATION.......................................................................................

21. VARIOUS PROTECTIONS.........................................................................................

20. ENERGY SAVE FUNCTION.......................................................................................

01-01 01-01 01-02 01-11 01-12 01-21 01-22 01-26 01-26 01-26 01-26

01-27 01-27 01-27

01-28

01-29

17. COIL DRY OPERATION CONTROL........................................................................... 01-28

01-32 01-32 01-33

01-27

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

2-1-1 INDOOR UNIT DISPLAY....................................................................................

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

2. TROUBLE SHOOTING

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

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

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

02-01 02-01 02-06

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

02-07

02-44

02-11

02-49

1-1-1 PARTS LAYOUT DRAWING...............................................................................

1-1-2 WIRING................................................................................................................

1-1-3 DISASSEMBLY PROCESS.................................................................................

1-1 For AO*18LMAK2/ 24LMAM2.................................................................................

1 REPLACEMENT PARTS ( For OUTDOOR UNIT ).......................................................

3. REPLACEMENT PARTS

03-01 03-01 03-01

03-04

03-03

1-2-1 PARTS LAYOUT DRAWING...............................................................................

1-2-2 WIRING................................................................................................................

1-2-3 DISASSEMBLY PROCESS.................................................................................

1-2-4 ASSEMBLY PROCESS of INVERTER UNIT......................................................

1-2 For AO*30LMAW4..................................................................................................

03-08 03-08

03-11

03-10

03-16

Page 3

1 . DESCRIPTION OF EACH CONTROL OPERATION

R410A

INVERTER (MULTI )

Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type

Page 4

2. AUTO CHANGEOVER OPERATION

01-01

1. CAPACITY CONTROL

1-1 COOLING, HEATING, DRY CAPACITY CONTROL

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

When the air conditioner is set to the AUTO mode by remote control, operation starts in the optimum mode from among the HEATING, COOLING and MONITORING modes. During operation, the optimum mode is automatically swiched in accordance with temperature changes. The temperature can be set between 18°C and 30°C in 1 degC steps.

When operation starts, only the indoor fan is operated for 1 minute. (Air flow mode: S- Lo) After 1 minute, depends on the room temperature and outdoor unit's operarion mode, the operation mode is selected in accordance with the table below.

( Table 1-1 : Operation mode selection table )

Room temperature :TR

Operation mode

TR > Ts +2 degC

Ts +2 degC > TR

Ts +2 degC > TR > Ts-2 degC

Cooling

Monitoring

Heating

Ts : Setting temperature TR: Room temperature

( Table 1-2 : Operation mode selection table for AS*18/ 24LBAJ )

Room temperature :TR

Operation mode

TR > Ts +2.5 degC

Ts +2.5 degC > TR

Ts +2.5 degC > TR > Ts-2.5 degC

Cooling

Monitoring

Heating

Ts : Setting temperature TR: Room temperature

When COOLING was selected at , the same operation as COOLING OPERATION is performed.

When HEATING was selected at , the same operation as HEATING OPERATION is performed.

When the compressor was stopped for 6 consecutive minutes by the temperature control function after the COOLING or HEATING operation mode was selected at above, operation is switched to MONITORING and the operation mode is selected again.

Page 5

3. INDOOR FAN CONTROL

1. Fan speed

( Table 2 : Indoor Fan Speed )

01-02

Operation mode Air flow mode Speed (rpm)

Hi 850

760 670

Cooling

S-Lo

Heating

AB*14LBAJ

Operation mode Air flow mode Speed (rpm)

Hi 1030

890 770

250

Operation mode Air flow mode Speed (rpm)

Hi 1180

1040

900

Cooling

S-Lo

Heating

AB*24LBAJ

300

250

Cooling

S-Lo

Heating

Cooling Heating

AB*18LBAJ

Operation mode Air flow mode Speed (rpm)

Hi 955

870 800 650

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 750

680 610 550

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 1000

860 720 570

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 1040

890 750 595

S-Lo

AR*9LUAB

AR*14LUAD

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 1270

1050

800 595

S-Lo

AR*22LUAD

AR*12LUAD

AR*18LUAD

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 850

800 740 670 300

Quiet

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 1040

950 800 740 300

Quiet

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 1230

1040

900 780 300

Quiet

S-Lo

AB*F14LAT

AB*F24LAT

AB*F18LAT

Page 6

01-03

Cooling Heating

AU*12/ 14LBAB

--- ---

AU*18LBAB

AU*F09LAL AU*F12LAL

Operation mode Air flow mode Speed (rpm)

Hi 730

670 590

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 800

700 600

S-Lo

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 1010

950 880 830 450

Quiet

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 790

720 620 570 330

Quiet

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 990

880 770 620 330

Quiet

S-Lo

AR*F09LALU

AR*F14LALU

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 1320

1100

980 780 450

Quiet

S-Lo

AR*F22LALU

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 1040

950 840 700 450

Quiet

S-Lo

AR*F18LALU

AR*F12LALU

Operation mode Air flow mode

Speed (rpm)

Hi 660

580 520 460

Dry Monitoring

Quiet

650

580

Me+

620

520 460 460 300

Auto S- Lo

Cooling Fan

Heating

Operation mode Air flow mode

Speed (rpm)

Hi 590

540 490 440

Dry Monitoring

Quiet

590

540

Me+

570

490 440 460 300

Auto S- Lo

Cooling Fan

Heating

Operation mode Air flow mode

Speed (rpm)

Hi 730

630 540 460

Dry Monitoring

Quiet

740

670

Me+

700

600 480 460 300

Auto S- Lo

Cooling Fan

Heating

AU*F14LAL

Operation mode Air flow mode

Speed (rpm)

Hi 790

660 570 460

Dry Monitoring

Quiet

840

750

Me+

800

650 500 460 300

Auto S- Lo

Cooling Fan

Heating

AU*F18LAL

Page 7

01-04

Cooling Heating

Operation mode Air flow mode Speed (rpm)

Hi 1160

1000

830 780 550

Quiet

S-Lo

Operation mode Air flow mode Speed (rpm)

Hi 1290

1100

870 730 550

Quiet

S-Lo

AS*18LBAJ AS*24LBAJ

Operation mode Air flow mode

Speed (rpm)

Louver position Louver position

Hi 1100

1050 1000

950

950 500

Cooling Fan

Quiet

Hi 1120

1070 1000

930 500

1100 1030

970

Heating

AS*7LMACW

S- Lo

Operation mode Air flow mode

Speed (rpm)

Louver position Louver position

Hi 1200

1100 1000

940

940 500

Cooling Fan

Quiet

Hi 1200

1100 1000

900 500

1150 1050

960

Heating

AS*9LMACW

S- Lo

Operation mode Air flow mode

Speed (rpm)

Louver position Louver position

Hi 1310

1260 1190 1100

970 500

Cooling Fan

Quiet

Hi 1310

1180 1030

970 500

1200 1100 1000

Heating

AS*12LMACW

S- Lo

Page 8

01-05

Operation mode Air flow mode

Speed (rpm)

Hi 1140

1000

880 700

Dry Monitoring

Quiet

Hi/ Me+

Quiet

1140

1050

980 800 700 480

Auto S- Lo

Cooling Fan

Heating

AS*A07LACM

Operation mode Air flow mode

Speed (rpm)

Hi 1220

1060

900 720

Dry Monitoring

Quiet

Hi/ Me+

Quiet

1220 1110 1040

830 720 480

Auto S- Lo

Cooling Fan

Heating

AS*A09LACM

Operation mode Air flow mode

Speed (rpm)

Hi 1280

1100

900 750

Dry Monitoring

Quiet

Hi/ Me+

Quiet

1320 1180 1080

860 750 480

Auto S- Lo

Cooling Fan

Heating

AS*A12LACM

Operation mode Air flow mode

Speed (rpm)

Hi 1480

1250 1050

850

Dry Monitoring

Quiet

Hi/ Me+

Quiet

1480 1250 1100

950 850 480

Auto S- Lo

Cooling Fan

Heating

AS*A14LACM

Operation mode Air flow mode

Speed (rpm)

Hi 1480

1250 1100

950

Dry Monitoring

Quiet

Hi/ Me+

Quiet

1480 1250 1100

950 950 480

Auto S- Lo

Cooling Fan

Heating

AS*A18LACM

Page 9

01-06

AG*F09LAC

Operation mode

Air flow mode

Speed (rpm)

Hi 1120/ 950 1230/ ---

960/ 820 1070/ ---

660/ 560 680/ ---

820/ 700 910/ -- 660/ 560 750/ -- 570/ 480 --- / --1120/ 950 1230/ --1000/ 850 1090/ -- 860/ 730 940/ -- 660/ 560 750/ ---

660/ 560

680/ ---

Heating

Quiet

Cool air prevention

S-Lo

Cooling Fan

Upper& Lower air flow mode

Upper air flow mode

(Upper/ Lower)

(Upper/ Lower) (Upper/ Lower)

AG*F12LAC

Operation mode

Air flow mode

Speed (rpm)

Hi 1240/ 1050 1300/ ---

1050/ 890 1120/ ---

660/ 560 680/ ---

860/ 730 930/ -- 660/ 560 750/ -- 570/ 480 --- / --1240/ 1050 1300/ --1080/ 920 1140/ -- 910/ 770 980/ -- 660/ 560 750/ ---

660/ 560

680/ ---

Heating

Quiet

Cool air prevention

S-Lo

Cooling Fan

Upper& Lower air flow mode

Upper air flow mode

(Upper/ Lower)

(Upper/ Lower) (Upper/ Lower)

AG*F14LAC

Operation mode

Air flow mode

Speed (rpm)

Hi 1330/ 1120 1370/ ---

1100/ 930 1160/ ---

660/ 560 680/ ---

890/ 750 960/ -- 660/ 560 750/ -- 570/ 480 --- / --1330/ 1120 1370/ --1140/ 970 1180/ -- 940/ 800 1020/ -- 660/ 560 750/ ---

660/ 560

680/ ---

Heating

Quiet

Cool air prevention

S-Lo

Cooling Fan

Upper& Lower air flow mode

Upper air flow mode

(Upper/ Lower)

(Upper/ Lower) (Upper/ Lower)

2. FAN OPERATION

The airflow can be switched in 5 steps such as AUTO, QUIET, LOW, MED, HIGH, while the indoor fan only runs.

2-2. For AB*F14L/ 18L/ 24L AR*F09L/ 12L/ 14L/ 18L/ 22L AU*F09L/ 12L/ 14L/ 18L AS*7L/ 9L/ 12L/ 18L/ 24L AS*A07L/ 09L/ 12L/ 14L/ 18L AG*F09L/ 12L/ 14L

The airflow can be switched in 4 steps such as AUTO, LOW, MED, HIGH, while the indoor fan only runs.

2-1. For AB*14L/ 18L/ 24L AR* 9L/ 12L/ 14L/ 18L/ 22L AU*12L/ 14L/ 18L

Page 10

3. COOLING OPERATION

(Fig.1)

airflow change - over ( Cooling: AUTO )

When the room temperature rises

Lo mode

When the room temperature lowers

01-07

Hi mode

Me mode

TR : Room temperature Ts : Setting temperature

TR-Ts > 2 degC

1 degC > TR-Ts

2 degC > TR-Ts > 1 degC

TR-Ts > 3 degC

*(TR-Ts > 2.5 degC)

2 degC > TR-Ts

*(2 degC > TR-Ts)

3 degC > TR-Ts > 2 degC

*(2.5 degC > TR-Ts > 1.5 degC)

= =

*1 : Contains a condition to the following

When the operation mode is set to AUTO mode at the start of operation. When the setting temperature was changed. When the operation mode was changed to COOLING mode. When the airflow mode was changed to AUTO mode.

4. HEATING OPERATION

When the airflow is set to [AUTO], the indoor fan motor operates [MED] mode. Then the indoor fan motor will run according to a room temperature, as shown in Figure 2.

On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table 2.

47°C

41°C *(42°C)

Indoor heat exchanger temperature

( Fig.2 : Airflow change - over ( Heating : AUTO ) )

Hold

Go down one-step

Go up one-step

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Figure 1. On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [COOL] operation modes QUIET, LOW, MED, HIGH,as shown in Table 2.

*For AS*7/ 9/ 12LMACW

*For AS*A07/ 09/ 12/ 14/ 18LACM

*For AB*F/ AR*F/ AS*A/ AU*F/ AG*F Type

4-1. For AB/ AR/ AU/ AS Type

4-2. For AB*F/ AR*F/ AU*F/ AS*A/ AG*F Type

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, as shown in Figure 3.

On the other hand, if switched in [HIGH] [QUIET], the indoor motor will run at a constant airflow of [HEAT] operation modes QUIET, LOW, MED, HIGH, as shown in Table 2.

( Fig.3 : Airflow change - over ( Heating : AUTO ) )

TR-Ts > - 1.5 degC

- 2.5 degC > TR-Ts

- 1.5 degC > TR-Ts > - 2.5 degC =

TR-Ts > - 1 degC

- 2 degC > TR-Ts

- 1 degC > TR-Ts > - 2 degC =

When the room temperature rises

When the room temperature drops

TR : Room temperature Ts : Setting temperature

Lo mode

Me mode

Hi mode *(Me+ mode)

Page 11

01-08

5. COOL AIR PREVENTION CONTROL (Heating mode)

Setting Fan mode

Lo mode

S-Lo mode

33°C

30°C

Indoor heat exchanger temperature

The maximum value of the indoor fan speed is set as shown in Figure 4, based on the detected temperature by the indoor heat exchanger sensor on heating mode.

( Fig.4 : Cool Air Prevention Control )

5-1. For AB/ AR/ AU Type

5-2. For AB*F/ AU*F Type

5-3. For AR*F Type

42°C

30°C

34°C

Indoor heat exchanger temperature

When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 5, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.5 : Cool Air Prevention Control )

< [Hi] setting >

Me+

Cool air prevention

39°C

37°C

32°C

24°C

39°C

32°C

Indoor heat exchanger temperature

< The other of [Hi] setting >

< [Hi] setting >

< The other of [Hi] setting >

S-Lo

Lo (Qu)

Cool air prevention

37°C

30°C

34°C

24°C

Setting FAN mode

S-Lo

When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 6, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.6 : Cool Air Prevention Control )

Setting Fan mode

Lo (Qu) mode

S-Lo mode

37°C

30°C

32°C

24°C

Indoor heat exchanger temperature

Hi mode

Lo mode

S-Lo mode

37°C

30°C

32°C

24°C

Indoor heat exchanger temperature

Page 12

01-09

42°C

35°C

30°C

18°C

39°C

32°C

26°C

15°C

Indoor heat exchanger temperature

The maximum value of the indoor fan speed is set as shown in Figure 7-1,7-2, based on the fan speed mode and the detected temperature by the indoor heat exchanger sensor on heating mode.

( Fig.7-1 : Cool Air Prevention Control for AS*7/ 9/ 12LMACW )

5-4. For AS Type

E zone

D zone

C zone

B zone

A zone

AUTO HIGH MED LOW QUIET

E zone D zone C zone B zone A zone

Fan speed mode

ZONE

AUTO AUTO

S-Lo OFF OFF OFF OFF OFF

S-Lo S-Lo S-Lo S-Lo

Lo Lo Lo

Setting Fan Speed

40°C

33°C

28°C

18°C

38°C

31°C

26°C

16°C

Indoor heat exchanger temperature

( Fig.7-2 : Cool Air Prevention Control for AS*18/ 24LBAJ )

E zone

D zone

C zone

B zone

A zone

AUTO HIGH MED LOW QUIET

E zone D zone C zone B zone A zone

Fan speed mode

ZONE

AUTO AUTO

S-Lo OFF OFF OFF OFF OFF

S-Lo S-Lo S-Lo S-Lo

Lo Lo Lo

Setting Fan Speed

5-5. For AS*A Type

47°C

30°C

34°C

Indoor heat exchanger temperature

When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 8, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.8 : Cool Air Prevention Control )

< [Hi] setting >

Me+

Cool air prevention

40°C

37°C

40°C

32°C

28°C

40°C

32°C

Indoor heat exchanger temperature

< The other of [Hi] setting >

S-Lo

Lo (Qu)

Cool air prevention

37°C

30°C

34°C

28°C

Setting FAN mode

S-Lo

[ AS*A07L: Cool air prevention 800rpm, S-Lo 480rpm ] [ AS*A09L: Cool air prevention 830rpm, S-Lo 480rpm ] [ AS*A12L: Cool air prevention 860rpm, S-Lo 480rpm ] [ AS*A14L/ 18L: Cool air prevention 850rpm, S-Lo 480rpm ]

Page 13

01-10

5-6. For AG*F Type

42°C

30°C

31°C

Indoor heat exchanger temperature

When the compressor operates, the maximum value of the indoor fan speed is set as shown in Figure 9, based on the detected temperature by the indoor heat exchanger sensor on heating mode. When the compressor does not operate, the indoor fan motor operates [S-Lo] mode.

( Fig.9 : Cool Air Prevention Control )

< [Hi] setting >

Cool air prevention

39°C

37°C

34°C

29°C

24°C

39°C

29°C

Indoor heat exchanger temperature

< The other of [Hi] setting >

S-Lo

Lo (Qu)

Cool air prevention

37°C

30°C

31°C

24°C

Setting FAN mode

S-Lo

During the dry mode operation, the fan speed setting can not be changed. ( S-Lo )

6. DRY OPERATION

Page 14

01-11

4. OUTDOOR FAN CONTROL

Following table shows the fan speed of the outdoor unit.

1. Outdoor Fan Motor

For AO*18LMAK2/ 24LMAM2 When the outdoor heat exchanger tenperature is lower than 2°C, the fan speed switches to 780rpm on heating mode.

For AO*30LMAW4 It runs at 500rpm for 20 seconds after starting up the outdoor fan. When the outdoor heat exchanger tenperature is lower than 2°C, the fan speed switches to 780rpm on heating mode.

( Table 3 : Fan speed of the outdoor unit )

780/ 420 rpm

820/ 780/ 400/ 300/ 200 rpm

850/ 780/ 400/ 300/ 200 rpm

780/ 420 rpm

Cooling

Heating

AO*18LMAK2

AO*30LMAW4

AO*24LMAM2

Page 15

5. LOUVER CONTROL

1. VERTICAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry / Fan mode Horizontal flow Heating mode Downward flow

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. 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.

(Swinging Range)

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.

01-12

The indoor fan motor starts after the louver reaches to the setting position.

At the start of operation if the setting louver position is ,the setting position is set to after the louver moves from totally-enclosed position to . (Positioning Control)

( Stop mode means Operation stop.)

Airflow direction set Range of swing

to to to to

5-1 Compact Cassette (AU) type

Page 16

1. VERTICAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry / Fan mode Horizontal flow Heating mode Downward flow

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing. The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position.

01-13

The indoor fan motor starts after the louver reaches to the setting position.

At the start of operation if the setting louver position is or ,the setting position is set to or after the louver moves from totally-enclosed position to . (Positioning Control)

( Stop mode means Operation stop.)

1 2 3 4 5 6 7

(Swinging Range)

Airflow direction set

Range of swing

to to to to

to to to

5-2 Universal (AB) type

Page 17

2. HORIZONTAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

The horizontal airflow direction is set automatically on after initialization.

(Function Range)

(Air Direction Range)

(Operation Range)

2-1. SWING OPERATION

When the swing signal is received from the remote controller, the horizontal louver starts to swing. The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position.

01-14

( Stop mode means Operation stop.)

1 2 3 4 5

1 2 334 5

(Swinging Range)

Airflow direction set

Range of swing

to to to to

1 5

Page 18

1. VERTICAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode

Use the air direction adjustments within the ranges shown above.

The remote control unit's display does not change.

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 mode operation, for the first minute after beginning operation, airflow will be horizontal ; the air direction cannot be adjusted during this period.

Cooling mode / Dry mode / Fan mode ( ) ) Heating mode / Fan mode (

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. SWING OPERATION

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

(Swinging Range)

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.

01-15

5-3 Wall Mounted (AS*7/ 9/ 12L) type

Page 19

1. VERTICAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode

Use the air direction adjustments within the ranges shown above.

The remote control unit's display does not change.

Direction Only the direction of the Moving Diffuser changes: the direction of the Air Direction Flaps does not change.

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 mode operation, for the first minute after beginning operation, airflow will be horizontal ; the air direction cannot be adjusted during this period.

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. SWING OPERATION

01-16

5-4 Wall Mounted (AS*18/ 24L) type

When the swing signal is received from the remote controller, the vertical louver starts to swing. The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position. ( Stop mode means Operation stop.)

(Swinging Range)

Airflow direction set

Range of swing

to to to to

to to

Page 20

01-17

2. HORIZONTAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

The horizontal airflow direction is set automatically on after initialization.

(Function Range)

(Air Direction Range)

(Operation Range)

2-1. SWING OPERATION

When the swing signal is received from the remote controller, the horizontal louver starts to swing. The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position. ( Stop mode means Operation stop.)

1 2 3 4 5

1 2 334 5

(Swinging Range)

Airflow direction set

Range of swing

to to to to

1 5

Page 21

1. VERTICAL LOUVER CONTROL

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

Cooling / Dry mode Heating mode Fan mode

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry mode Horizontal flow Heating mode Downward flow

When the temperature of the air being blown out is low at the start of heating operation or during defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

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

range ( ) for long period of time, since water vapor many condense near the outlet louvers and drop of water may drip from the air conditioner. During the Cooling and Dry modes, if the Air Flow Direction Louvers are left in the hating range for more than 30 minutes, they will automatically return to position .

During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically becomes , and it cannot be adjusted.

Cooling mode / Dry mode / Fan mode ( ) Heating mode / Fan mode ( )

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. SWING OPERATION

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

(Swinging Range)

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.

01-18

5-5 Wall Mounted (AS*A) type

Page 22

01-19

5-6 Compact Cassette (AU*F) type

1. VERTICAL LOUVER CONTROL

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

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry / Fan mode Horizontal flow Heating mode Downward flow

(Function Range)

(Air Direction Range)

(Operation Range)

1-2. SWING OPERATION

When the swing signal is received from the remote controller, the vertical louver starts to swing. The range of swing depends on the set airflow direction.

When the indoor fan is either at S-Lo or Stop mode, the swinging operation is interrupted and the louver stops at the memorized position.

( Stop mode means Operation stop.)

During Cooling/Dry mode/Fan mode : During Heating mode :

During AUTO mode operation, for the first minute after beginning operation, air-flow will be horizontal ; the air direction cannot be adjusted during this period.

(Swinging Range)

The type of operation

Cooling/Dry/Fan

Range of swing

Heating

Page 23

01-20

5-7 Floor (AG*F) type

1. VERTICAL LOUVER CONTROL

1-2. SWING OPERATION

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

Use the air direction adjustments within the ranges shown above.

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

Cooling / Dry mode Horizontal flow Heating mode Downward flow

When the temperature of the air being blown out is low at the start of heating operation or during defrosting, the airflow direction temporarily becomes to prevent cold air being blown onto the body.

During Monitor operation in AUTO CHANGEOVER mode, the airflow direction automatically becomes , and it cannot be adjusted.

(Function and Operation Range)

(Air Direction Range)

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

(Swinging Range)

When the indoor fan is either at S-lo or Stop mode, the swinging operation is interrrupted and the louver stops at the memorized position.

Page 24

01-21

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 4.

Cooling Heating

Min Max Min Max

AO*18LMAK2 15Hz 80Hz 15Hz 95Hz AO*24LMAM2 AO*30LMAW4

15Hz 80Hz 15Hz 95Hz 15Hz 90Hz 20Hz 95Hz

(Table 4 : Compressor Operation Frequency Range)

2. OPERATION FREQUENCY CONTROL AT START UP

2-1. For AO*18L/ 24L

The compressor frequency soon after the start-up is controlled as shown in Figure 10-1.

(Fig.10-1 : Compressor Control at Start-up)

56Hz

40Hz

46sec 60sec 80sec 160sec

80Hz

Hold

2-2. For AO*30LMAW4

The compressor frequency soon after the start-up is controlled as shown in Figure 10-2.

(Fig.10-2 : Compressor Control at Start-up)

180sec

60sec

120sec

720sec

1 Discharge pipe temp. > 30°C 2 Discharge pipe temp. < 30°C

Hold

Page 25

7. TIMER OPERATION CONTROL

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

01-22

7-1 Wireless Remote Controller ( For AB/ AU/ AU*F/ AS/ AS*A/ AB*F/ AG*F type )

ON / TIMER OFF / TIMER

PROGRAM TIMER

SLEEP TIMER

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

Operation mode

Operation will start from the timer setting (either OFF timer or ON timer) whichever is closest to the clock's current timer setting. The order of operations is indicated by the arrow in the remote control unit's display.

SLEEP timer operation cannot be combined with ON timer operation.

Stop mode

Operation mode

Set time

Set time Set time Set time

Page 26

01-23

3. SLEEP TIMER

If the sleep timer 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.

Set temperature rises

( Ts : Set temperature )

Stop of operation

Set temperature lowers ( Ts : Set temperature )

Stop of operation

In the cooling operation mode

When the sleep timer is set, the setting temperature is increased 1 degC. It increases the setting temperature another 1 degC after 1 hour. After that, the setting temperature is not changed and the operation is stopped at the time of timer setting.

+1degC

+2degC

-2degC

-1degC

-4degC

-3degC

Set

60min

In the heating operation mode

When the sleep timer is set, the setting temperature is decreased 1 degC. It decreases the setting temperature another 1 degC every 30 minutes. Upon lowering 4 degC, the setting temperature is not changed and the operation stops at the time of timer setting.

Set

30min

Page 27

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

The weekly timer allows up to two ON and OFF time to set up per day.

Use this timer function to set operating time for each day of the week.

Operation mode

The operating time can be set in 30 min increments only. The OFF time can be carried over to next day. The ON timer and the OFF timer functions cannot be set with using the weekly timer.

Both ON and OFF time must be set.

2. WEEKLY TIMER

2-1. WEEKLY TIMER

Stop mode

Operation mode

Set time

Set time Set time Set time

01-24

7-2 Wired Remote Controller ( For AR/ AR*F type )

ON / TIMER OFF / TIMER

WEEKLY TIMER

TEMPERATURE SET BACK TIMER

Page 28

01-25

The DAY OFF setting is only available for days for which weekly settings already exist.

The SET BACK timer only changes the set temperature for 7 days, it cannot be used to start or stop air conditioner operation.

The SET BACK timer can be set to operate up to two times per day but only one temperature setting can be used.

During the COOL/DRY mode, the air conditioner will operate at a minimum of 18°C even if the SET BACK temperature is set to 17°C or lower.

The DAY OFF setting can only be set one time. The DAY OFF setting is cancelled automatically after the set day has passed.

Normal

Next day setting

If the operating time carries over to the next day (during a next day setting), the effective DAY OFF range will be set as shown below.

2-2. DAY OFF setting

3. TEMPERATURE SET BACK TIMER

Stop mode

Operation mode

Stop mode

Operation mode

Preceding day Next day

DAY OFF

Stop mode

Operation mode

Stop mode

Operation mode

DAY OFF

Setting day

Preceding day Next daySetting day

Case of SET BACK timer on the Cooling operation. ( Setting temperature :22°C, SET BACK temperature :26°C)

SET BACK setting

Operation temperature

26°C

22°C

26°C

22°C

24°C

ON OFF OFFON

*1: During the SET BACK function, the setting temperature is changed.

Chenge the setting temperature: 22°C 24°C

Page 29

8. ELECTRONIC EXPANSION VALVE CONTROL

9. TEST OPERATION CONTROL

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

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

11. 4-WAY VALVE EXTENSION SELECT

01-26

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

The pulse range of the electronic expansion valve control is between 30 to 480 pulses.

At the time of supplying the power to the outdoor unit, the initialization of the electronic expansion valve is operated (1000 pulses are input to the closing direction).

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.

Under the condition where the air conditioner runs, short two metal contacts under the battery compartment lid, 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

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.

With Wired Remote Controller ( without 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 ( with TEST RUN button )

Page 30

13. MANUAL AUTO OPERATION (Indoor unit body operation)

If MANUAL AUTO Button is set, the operation is controlled as shown in Table 5. If the remote control is lost or battery power dissipated, this function will work without the remote control.

(Table 5 : Manual auto operation)

14. COMPRESSOR PREHEATING

01-27

When the outdoor heat exchanger temperature is lower than Operation temperature (Refer to Table 6) and the heating operation has

been stopped for 3 hours, 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 Release temperature or greater, preheating

is over.

(Table 6 : Preheating Operation / Release Temperature)

Before 24 hour After 24 hour

Operation temperature

Release temperature

3°C 7°C 0°C 4°C

OPERATION MODE

Auto changeover

FAN CONT. MODE

Auto

TIMER MODE

Continuous (No timer setting available)

SETTING TEMP.

23°C or 24°C

SETTING LOUVER

Standard

SWING

OFF

The fan motor for Fresh Air is operated in synchronization with the indoor fan operation as shown in Figure 11.

15. FRESH AIR CONTROL (For AR type)

(Fig.11 : Fresh air control)

Operation

Stop

Operation

Stop

Fan motor (Indoor unit)

Fan motor (for Fresh Air)

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. When the power is interrupted and recovered during timer operation, timer operation is canceled, but only setting time is memorized.

[Operation contents memorized when the power is interrupted]

Operation mode Set temperature

Set air flow

Timer mode and timer time Air flow Direction

Swing Thermistor detected position (For AU*F model wih wired remote controller)

10°C HEAT (For AG*F model)

Page 31

01-28

The external electrical heater is operated as shown in Figure 12.

16. EXTERNAL ELECTRICAL HEATER CONTROL (For AR type)

(Fig.12 : External electrical heater control)

When the room temperature rises

When the room temperature drops

Ts : Setting temperature

Heater : OFF

Heater : ON

Heater : OFF

Ts -10°C

Ts -1°C

Ts -3°C

Ts -12°C

When the compressor stop, External electrical heater is OFF.

17. COIL DRY OPERATION CONTROL (For AS*A/ AG*F type)

The coil-dry operation functions by pressing COIL DRY button on the remote controller. The coil-dry operation is consisted of 3 cycles of [Fan operation 3 minutes / Heating operation 2 minutes], and Fan operates for 3 minutes at last before ending the air conditioner operation. (It takes 18 minutes to complete the coil-dry operation.)

Page 32

18. DEFROST OPERATION CONTROL

01-29

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 8-1.

(Table 8-1 : Defrost Release Condition)

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 10°C or Compressor operation time has passed 15 minutes.

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 7-1.

(Table 7-1 : Condition of starting Defrost Operation)

Less than 6 min. *1 or 10min. *2

*2. Compressor stop time: Below 20min. Select 6min. Above 20min. Select 10min.

After 6 min. *1 or 10min. *2

Compressor integrating operation :Less than 40min.

Compressor integrating operation :40min and over

-8°C

Does not operate

*1. It means contiguous operation time.

1-1. For AO*18LMAK2/ 24LMAM2

2-1. For AO*18LMAK2/ 24LMAM2

Defrost operation is released when the conditions become as shown in Table 8-2.

(Table 8-2 : Defrost Release Condition)

Release Condition

Outdoor heat exchanger temperature sensor value is higher than 12°C or Compressor operation time has passed 15 minutes.

2-2. For AO*30LMAW4

1-2. For AO*30LMAW4

The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 7-2.

(Table 7-2 : Condition of starting Defrost Operation)

Less than 6 min. *1 or 10min. *2

*3. Outdoor temp. > -1°C *4. Outdoor temp. < -1°C

*2. Compressor stop time: Below 20min. Select 6min. Above 20min. Select 10min.

After 6 min. *1 or 10min. *2

Compressor integrating operation :Less than 45min.

Compressor integrating operation :45min and over

-8°C *3

-10°C *4

Does not operate

*1. It means contiguous operation time.

Page 33

3. Defrost Flow Chart

3-1. For AO*18LMAK2/ 24LMAM2

The defrosting shall proceed by the integrating operation time as follows.

(Not defrosted for 6 or 10 minutes)

3 sec later Compressor OFF 3 sec later Outdoor fan motor OFF 28 sec later 4-way valve OFF 34 sec later compressor ON (Frequency : 95 Hz)

Heating operation start : Compressor ON

Defrost Indicator: [Operation lamp] 9 sec ON / 1 sec OFF

Outdoor heat exchanger temperature: Over 10°C or Compressor ON time: Over 15 minutes

Defrost end

01-30

Compressor integrating operation: 40 minutes and over

Outdoor heat exchanger temperarure: Below -8°C

Defrost start

Page 34

3-2. AO*30LMAW4

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

(Not defrosted for 6 or 10 minutes)

3 sec later Compressor OFF 3 sec later Outdoor fan motor OFF 28 sec later 4-way valve OFF 34 sec later compressor ON (Frequency : 92 Hz)

Heating operation start : Compressor ON

Defrost Indicator: [Operation lamp] 9 sec ON / 1 sec OFF

Outdoor heat exchanger temperature: Over 12°C or Compressor ON time: Over 15 minutes

Defrost end

01-31

Compressor integrating operation: 45 minutes and over

Outdoor heat exchanger temperarure: Below -10°C

Outdoor heat exchanger temperarure: Below -8°C

Outdoor temp. > -1°C

Outdoor temp. < -1°C

Defrost start

Page 35

01-32

20. ENERGY SAVE FUNCTION (For AR type)

1. During Cooling / Dry operation:

The thermostat temperature setting increases by 1 degC as soon as the ENERGY SAVE button is pressed, and then increases by 1 degC after 1 hour later. Afterwards, energy consumption is saved by continuing to cool or dry at a thermostat temperature of 2 degC higher than setting temperature.

2. During Heating operation:

The thermostat temperature setting decreases by 1 degC as soon as the ENERGY SAVE button is pressed, and then decreases by another 1 degC every 30 minutes. Afterwards, energy consumption is saved by continuing to heat at a thermostat temperature of 4 degC lower than setting temperature.

1hour.

1 degC

2 degC

ENERGY SAVE ON

Setting temperature

1degC 2degC 3degC 4degC

30min.

1 hour.

1 hour 30 min.

ENERGY SAVE ON

Setting temperature

19. DRAIN PUMP OPERATION ( For AU type )

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 "Indoor heat exchanger de-icing function", the drain pump is turned off in 1 hour after the compressor stops.

4.When the water level in the drain pan rises up and then the float switch functions: The compressor, indoor and outdoor fan motor operation are stopped. Drain pump operates continuously for 3 minutes after the float switch is turned off. (Almost condensing water may be drained)

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

6. When the float switch turns OFF within 3 min., the unit starts cooling operation.

1 2

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 min., "FAILURE INDICATION" operates.

During Cooling / Dry operation

During Heating / Fan / Stop operation

Page 36

21. 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 110°C ,the compressor frequency is decreased 10 Hz, and it continues to decrease the frequency for 10 Hz every 120 seconds until

the temperature becomes lower than 110°C . When the discharge temperature becomes lower than 105°C ,the control of the compressor frequency is released.

When the discharge temperature becomes higher than 120°C ,the compressor stops. When the discharge temperature becomes lower than 80°C ,the compressor operates.

2. CURRENT RELEASE CONTROL

01-33

The compressor frequency is controlled so that the outdoor unit input current does not exceeds the current limit velue 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. ANTI-FREEZING CONTROL (Cooling mode)

The compressor frequency decreases on cooling mode when the indoor heat exchanger temperature sensor detects the temperature lower than 3°C. Then, the anti-freezing control is released when it becomes higher than 6°C.

(Fig 13 : Anti-freezing Protection Operation / Release Temperature)

Indoor heat exchange temperature

3°C

6°C

12°C

The compressor frequency is decreased 10Hz every 120 seconds.

Compressor OFF : Hold Compressor ON : Release of protection

Hold

Release of protection

Page 37

01-34

4. COOLING PRESSURE OVER RISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to 70.5°C or greater, the compressor is stopped and error display is indicated.

Indoor heat exchange temperature

5. HIGH TEMPERATURE RELEASE CONTROL ( HEATING MODE )

On heating mode, the compressor frequency is controlled as following based on the detection value of the indoor heat exchanger temperature sensor.

(Fig 14 : Heating Overload Protection Control)

63°C

54°C 50°C

56°C 52°C

Temperature

AO*18LMAK2 AO*24LMAM2 AO*30LMAW4

Temperature

Compressor is OFF

The compressor frequency is decreased 10Hz every 60 seconds.

Compressor OFF : Release of protection Compressor ON : The compressor frequency is increased 10Hz every 60seconds.

Hold

Temperature

Page 38

2 . TROUBLE SHOOTING

R410A

INVERTER (MULTI )

Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type

Page 39

2. TROUBLESHOOTING

02-01

2-1 ERROR DISPLAY

2-1-1 INDOOR UNIT DISPLAY

1. ERROR DISPLAY Please refer the blinking pattern as follows.

2-way valve temperature thermistor error

Forced auto switch error

Power supply frequency detection error

Connected indoor unit error

Room temperature thermistor error

Indoor heat exchanger temperature thermistor error

Outdoor heat exchanger temperature thermistor error

Outdoor discharge pipe temperature thermistor error

IPM error

Compressor rotor location cannot detect

(permanent stop)

Compressor temperature thermistor error

Outdoor temperature thermistor error

3-way valve temperature thermistor error

Communication error (Serial reverse transfer error)

Outdoor communication signal error (Forward transfer signal error)

When an error occurs, "Large division indication" is indicated first. Secondly, "Small division indication" is indicated by pushing "Test run" button of remote controller.

Error contents Error contents

Thermistor error (indoor unit)

Thermistor error (outdoor unit)

(2 times)

Red lamp Green lamp

Red lamp

Green lamp

(2 times)

Red lamp

Green lamp

(3 times)

Red lamp

Green lamp (2 times)

Red lamp

Green lamp (4 times)

Red lamp

Green lamp (2 times)

Red lamp

Green lamp (3 times)

Red lamp

Green lamp (2 times)

Red lamp

Green lamp (3 times)

Red lamp

Green lamp

(2 times)

Red lamp

Green lamp

(4 times)

Red lamp

Green lamp

(6 times)

Red lamp

Green lamp

(8 times)

Red lamp

Green lamp

(9 times)

Red lamp

Green lamp

(10 times)

Red lamp

Green lamp

(2 times)

Red lamp

Green lamp

(2 times)

(3 times)

Red lamp

Green lamp

(2 times)

Red lamp

Green lamp

(5 times)

Control unit error (indoor unit)

Control unit error (outdoor unit)

Pressure switch error

Inverter error

Serial error

(4 times)

Fan motor error (indoor unit)

(5 times)

Indoor fan motor lock error

(6 times)

(2 times)

(3 times)

Red lamp Green lamp (4 times)

(5 times)

Indoor fan motor speed error

Pressure switch error

Red lamp Green lamp

Red lamp

Green lam

(2 times)

Indoor EEPROM abnormal error

Indoor EEPROM abnormal (Model No.)

Outdoor unit fan motor error

Red lamp

Green lamp

LED indication LED indication

Small division indicationLarge division indication

Trouble shooting

For AS*7/ 9/ 12LMACW

: Fast flashing : Slow flashing

Operation lamp : Red lamp Timer lamp : Green lamp

Page 40

02-02

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

Error display

OPERARION TIMER SWING

(RED) (GREEN) (ORANGE)

Error contents

2 times

3 times

5 times

6 times

5 times

8 times

9 times

IPM error 10 times

13 times

14 times

5 times

3 times

4 times

5 times

3 times

2 times

4 times

Fast flashing

Slow flashing

Off

2-way valve temperature thermistor error

Connected indoor unit error

Indoor heat exchanger temperature thermistor error (Opened) Indoor heat exchanger temperature thermistor error (Short circuited)

Outdoor heat exchanger temperature thermistor error

Outdoor discharge pipe temperature thermistor error

Compressor rotor location cannot detect

(permanent stop)

Compressor temperature thermistor error

Outdoor temperature thermistor error

3-way valve temperature thermistor error

Communication error (Serial reverse transfer error)

Outdoor communication signal error (Forward transfer signal error)

Indoor fan error

Pressure switch error

Indoor EEPROM abnormal

(Model No.)

Outdoor unit fan motor error

Trouble shooting

Room temperature thermistor error (Opened) Room temperature thermistor error (Short circuited)

Main CPU-Sub CPU communication error

4 times

Water drain abnormal

For AS*18/ 24LBAJ For AB*14L - 24L / AU*12L - 18L

Page 41

02-03

Forced auto switch error

Power supply frequency detection error

VDD permanence stop protection (Electric air clean)

Reverse-VDD permanence stop protection (Electric air clean power supply circuit abnormal)

The OPERATION, TIMER, AIR CLEAN and COIL DRY lamps operate as follows according to the error contents.

Error display

OPERATION

TIMER

COIL DRY

(RED) (GREEN) (GREEN)

(ORANGE)

Error contents

0.5s ON / 0.5s OFF (Flash)

OFF

2-way valve temperature thermistor error

Indoor heat exchanger temperature thermistor (middle) error

Outdoor heat exchanger temperature thermistor error

Outdoor discharge pipe temperature thermistor error

Compressor temperature thermistor error

Outdoor temperature thermistor error

Heat sink temperature thermistor error

Communication error (Serial reverse transfer error)

Outdoor communication signal error (Forward transfer signal error)

Trouble shooting

Room temperature thermistor error

For AS*A07 - 18LACM

Discharge temperature error

Indoor fan motor abnormal

Outdoor unit fan motor error

Pressure switch error

CT error

IPM error

Compressor rotor location cannot detect

(permanent stop)

8 times

Communication error

(indoor unit remote control)

2 times

3-way valve temperature thermistor error

2 times 3 times

4 times 5 times

2 times

3 times

2 times

3 times

4 times

3 times

7 times

3 times

8 times

4 times

2 times

4 times

7 times

4 times

8 times

5 times

2 times

5 times

3 times

5 times

6 times

5 times

7 times

5 times

6 times

8 times

7 times

2 times

7 times

5 times

2 times 3 times

8 times

3 times 2 times

3 times 3 times

Connected indoor unit error

Main CPU-Sub CPU communication error

AIR CLEAN or QUIET

Indoor EEPROM abnormal (Model No.)

Active filter module (AFM) error

Continuous blink

Page 42

02-04

For AG*F09 - 14LAC

Forced auto switch error

The OPERATION, TIMER and 10°C HEAT lamps operate as follows according to the error contents.

Error display

OPERATION

TIMER

(GREEN) (ORANGE) (GREEN)

Error contents

0.5s ON / 0.5s OFF (Flash)

OFF

Indoor heat exchanger temperature thermistor (middle) error

Outdoor heat exchanger temperature thermistor error

Outdoor discharge pipe temperature thermistor error

Outdoor temperature thermistor error

Communication error (Serial reverse transfer error)

Outdoor communication signal error (Forward transfer signal error)

Trouble shooting

Room temperature thermistor error

Discharge temperature error

Indoor fan lock error

Indoor UPPER fan speed error

Indoor LOWER fan lock error

Indoor LOWER fan speed error

Outdoor unit fan motor error

CT error

IPM error

Compressor rotor location cannot detect

(permanent stop)

Damper error

(UPPER & LOWER air flow)

Damper error

(UPPER air flow)

Damper error

8 times

Communication error

(indoor unit remote control)

2 times

2 times 3 times

4 times 5 times

2 times

3 times

2 times

3 times

4 times

2 times

4 times

3 times

5 times

2 times

5 times

3 times

5 times

6 times

2 times

6 times

3 times

6 times

2 times

3 times

6 times

4 times

6 times

5 times

7 times

2 times

10°C HEAT

Indoor EEPROM abnormal (Model No.)

Continuous blink

Main relay welded

Page 43

02-05

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

Error display

OPERATION TIMER

FILTER

(GREEN) (ORANGE)

(RED)

Error contents

0.5s ON / 0.5s OFF (Flash)

OFF

2-way valve temperature thermistor error

Indoor heat exchanger temperature thermistor (middle) error

Indoor heat exchanger temperature thermistor (inlet) error

Outdoor heat exchanger temperature thermistor error

Outdoor discharge pipe temperature thermistor error

Compressor temperature thermistor error

Outdoor temperature thermistor error

Heat sink temperature thermistor error

Communication error (Serial reverse transfer error)

Outdoor communication signal error (Forward transfer signal error)

Trouble shooting

Room temperature thermistor error

For AU*F09 - 18LAL AB*F14 - 24LAT

Discharge temperature error

Indoor fan motor abnormal

Outdoor unit fan motor error

Pressure switch error

CT error

Communication error

(Main PCB Display PCB)

Communication error

(Main PCB Display PCB)

IPM error

Compressor rotor location cannot detect

(permanent stop)

4-way valve error

Forced auto switch error

8 times

Communication error

(indoor unit remote control)

6 times

2 times

3 times

2 times

4 times

2 times

3 times

4 times3 times

7 times

3 times

2 times

4 times

2 times

5 times

3 times5 times

5 times5 times

6 times5 times

7 times5 times

8 times5 times

2 times7 times

4 times7 times

5 times7 times

6 times

8 times

3 times

2 times

3 times

3-way valve temperature thermistor error

3 times3 times

7 times

2 times 3 times

4 times 5 times

Connected indoor unit error

Main CPU-Sub CPU communication error

Page 44

02-06

Operation

0.5sec 0.5sec 2sec

OFF

1. ERROR DISPLAY

3. NORMAL OPERATION DISPLAY

2. ERROR DISPLAY METHOD

Outdoor LED Blink (1 to 18 times) 0.5sec ON / 0.5sec OFF blinking

2-1-2 OUTDOOR UNIT DISPLAY

LEDA LEDB LEDC LEDD

ＯＦＦＯＦＦＯＦＦ

2-way valve temperature thermistor A error

2-way valve temperature thermistor B error

2-way valve temperature thermistor C error

2-way valve temperature thermistor D error

3-way valve temperature thermistor A error

3-way valve temperature thermistor B error

3-way valve temperature thermistor C error

3-way valve temperature thermistor D error

Outdoor heat exchanger temperature thermistor error

Outdoor temperature thermistor error

Outdoor discharge pipe temperature thermistor error

Error Contents

1 times blink

2 times blink

OFF

OFF OFF

OFFOFF

OFF

OFFOFF

OFF

3 times blink

OFFOFF

OFF

4 times blink

OFFOFF

OFF

5 times blink

OFFOFF

OFF

5 times blink

OFFOFF

OFF

OFFOFFOFF

6 times blink

OFF

6 times blink

OFFOFFOFF

7 times blink

OFF

8 times blink

OFF

9 times blink

OFF

10 times blink

OFF

11 times blink

OFF

12 times blink

OFF

13 times blink

OFF

14 times blink

OFF

15 times blink

OFFOFF

OFF

17 times blink

OFFOFF

OFF

6 times blink

OFFOFFOFF

OFF

6 times blink

OFFOFFOFF

Trouble shooting

LED

A B C D

Outdoor communication signal error (Forward transfer signal error)

Connected indoor unit error

Main CPU - sub CPU communication error

Outdoor unit fan motor error

IPM error

Compressor rotor location cannot detect

(permanent stop)

Compressor temperature thermistor error

Heat sink temperature thermistor error

Pressure switch 1 error

Pressure switch 2 error

Compressor Start-up error

(permanent stop)

Normal operation

Continuously lighting

5sec ON / 1sec OFF

Protected operation

Page 45

02-07

Run [Self-Diagnosis] if [E:EE] flashes on the clock display of the remote controller.

When the error indication "E:EE" is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel.

Ex. Self-diagnosis

Error code

SUMOTUWETH FR

Display

1. Stop the air conditioner operation.

2. Press the SET TEMPERATURE buttons and simultaneously for 5 seconds or more to start the self-diagnosis.

3. Press the SET TEMPERATURE buttons and simultaneously for 5 seconds or more or there is no key input for 20 seconds to stop the self-diagnosis.

2-1-3 WIRED REMOTE CONTROLLER DISPLAY (For AR*9L - 22L)

1. SELF - DIAGNOSIS

Error code

Error contents

Trouble shooting

Communication error (Serial reverse transfer error)

Room temperature thermistor open

Room temperature thermistor short-circuited

Indoor heat exchanger temperature thermistor open

Indoor heat exchanger temperature thermistor short-circuited

Outdoor heat exchanger temperature thermistor error

Outdoor heat exchanger temperature thermistor short-circuited

Outdoor temperature thermistor open

Outdoor temperature thermistor short-circuited

Outdoor discharge pipe temperature thermistor open

Outdoor discharge pipe temperature thermistor short-circuited

Indoor EEPROM abnormal (Model No.)

Indoor fan motor abnormal

Outdoor unit fan motor error

Outdoor communication signal error (Forward transfer signal error)

Pressure switch error

CT error

Active Filter Module (AFM) error

Communication error (indoor unit remote control)

IPM error

Compressor rotor location cannot detect

Compressor temperature thermistor error

1 2

11 12 13 14 15 16

17 18 24 21

22 23

2-way valve temperature thermistor error

Power supply frequency detection error

Connected indoor unit error

Main CPU - sub CPU communication error

3-way valve temperature thermistor error

Heat sink temperature thermistor error

DAY OFF

DELETE SET

ENERGY

SAVE

SET BACK

DAY

CLOCK ADJUST

SET

THERMO SENSOR

DAY OFF

DELETE SET

ENERGY

SAVE

SET BACK

DAY

CLOCK ADJUST

SUMOTUWETH FR

Page 46

02-08

1. Stop the air conditioner operation.

2. Press the SET TEMPERATURE buttons , and the START/STOP button simultaneously for 5 seconds or more to start the self-diagnosis.

5. Press the SET TEMPERATURE buttons , and START/STOP button simultaneously for 5 seconds or more or there is no key input for 20 seconds to stop the display.

DAY

2. ERROR CODE HISTORY DISPLAY

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

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

SUMOTUWETH FR

Error code

Error history number

Lower

3. Press the START/STOP button.

0 1 2 3 4 5 6 7

F E d c b A 9 8



SUMOTUWETH FR

DAY

Raise

Page 47

02-09

When "EE" in Temperature Display is displayed, inspection of the air conditioning system is necessary. Please consult authoilzed servise personnel.

Error code

Error contents

Trouble shooting

Communication error (Serial reverse transfer error)

Room temperature sensor error

Indoor heat exchanger temperature sensor error

Outdoor heat exchanger temperature sensor(outlet) error

Water drain abnormal

Outdoor temperature sensor error

Outdoor discharge pipe temperature sensor error

Discharge temperature error

Indoor fan motor abnormal

Outdoor unit fan motor error

Outdoor communication signal error (Forward transfer signal error)

2-1-4 WIRED REMOTE CONTROLLER DISPLAY (For AR*F09 - 22L)

Pressure switch error

Communication error (indoor unit remote control)

Communication error (Main PCB Display PCB)

IPM error

CT error

Compressor rotor location cannot detect (permanent stop)

Compressor temperature sensor error

1. SELF - DIAGNOSIS

1 2

5 6 7

11 12 13

14 15

17 18

31 27

Indoor manual auto switch error

Exessive high pressure protection on cooling

3 4

SU MOTUWETH FR SA

Unit number (usually 0)

Error code

ex. Self-diagnosis check

If “CO” appears in the unit number display, there is a remote controller error. Refer to the installation instruction sheet included with the remote controller.

4-way valve error

2-way valve temperature thermistor error

3-way valve temperature thermistor error

Main CPU - sub CPU communication error

Connected indoor unit error

Page 48

02-10

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.

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.

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

SU MOTU WETH FR SA

Error code

Error history number

0 1 2 3 4 5 6 7

F E d c b A 9 8



Lower

Raise

Page 49

Trouble shooting 1 INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check Remote Control and Controller PCB

Check Point 1 : Check the connection of terminal

OKOK

Indicate or Display:

Communication Error (Indoor unit Remote control)

Indoor unit controller PCB circuit Wired Remote Control

1. Terminal connection abnormal 2. Wired Remote Control failure 3. Controller PCB failure

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

Check the connection of terminal between remote control and Indoor unit, and check if there is a disconnection of the cable.

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

Check Voltage at CN17 of Controller PCB. (Power supply to Remote Control)

>> 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

When the indoor unit cannot receive the signal from Wired Remote more than 10seconds after power ON, or the indoor unit cannot receive the signal more than 1minute during normal operation.

02-11

2-2 TROUBLE SHOOTING WITH ERROR CODE

Refer to error code table.

Page 50

Trouble shooting 2

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Indicate or Display:

Refer to error code table.

YESYES

Communication Error (Serial Reverse Transfer Error)

Outdoor Unit Main PCB Circuit Active Filter Module

1. Connection failure 2. External cause 3. Main PCB failure 4. Active Filter Module failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check any loose or removed connection line of Indoor unit and Outdoor unit.

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

Check connection between Outdoor Unit Main PCB and Filter PCB. (If there is loose connector or open cable)

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

Check Point 4 : Check Serial Signal (Reverse Transfer Signal)

Check Serial Signal (Reverse Transfer Signal)

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal N - 3.

>> If it is abnormal, Check Active Filter Module. (PARTS INFORMATION 3)

When the indoor unit cannot receive the serial signal from Outdoor unit more than 10seconds.

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

>>If Active Filter Module is normal, replace Main PCB.

02-12

WHITE

BLACK

Page 51

Trouble shooting 3

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 : Check Point 2 : Remove connector and check Thermistor resistance value

Check Point 1 : Check connection of Connector

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

6.51

35°C

8.04

30°C

10.012.515.820.225.933.6Resistance Value (k )

25°C20°C15°C10°C5°C0°C

Temperature

3.594.355.30Resistance Value (k )

50°C45°C40°C

Temperature

Room Temperature Thermistor Error

Indoor Unit Controller PCB Circuit Room Temperature Thermistor

When Room Temperature Thermistor open or short-circuit is detected at power ON.

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

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Thermistor Characteristics (Approx. value)

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

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

If the voltage does not appear, replace Controller PCB.

02-13

Refer to error code table.

Page 52

Trouble shooting 4

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

31.7

35°C

39.6

30°C

49.762.980.3103134176Resistance Value (k )

25°C20°C15°C10°C5°C0°CTemperature

OKOK

17.120.825.6Resistance Value (k )

50°C45°C40°CTemperature

Indoor Heat Exchanger Temperature Thermistor Error

Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor

When Heat Exchanger Temperature Thermistor open or short-circuit is detected at power ON.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Controller PCB.

02-14

Refer to error code table.

Page 53

Trouble shooting 5 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

4.77

25°C

5.98

20°C

7.569.6312.416.121.027.8Resistance Value (k )

15°C10°C5°C0°C-5°C-10°CTemperature

OKOK

3.84

30°C

Outdoor Heat Exchanger Temperature Thermistor Error

Outdoor Unit Main PCB Circuit Heat Exchanger Temperature Thermistor

When Heat Exchanger Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-15

Refer to error code table.

THERMISTOR

(DISCHARGE)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

THERMISTOR

(HEAT SINK)

BROWN

BLACK

BLUE

CN25 CN23 CN22 CN21

1 21 21 21 2

Page 54

Check Point 2 : Check Point 2 : Check Connector (CN15) / Wire

Check Point 1 : Check Float Switch

Check Point 3 : Replace Controller PCB

ONON OFFOFF

OKOK

Trouble shooting 6

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Water Drain Abnormal

Indoor Unit Controller PCB Circuit Float Switch

When Float Switch is ON for more than 3 minutes.

1. Float Switch failure 2. Shorted connector/ wire 3. Controller PCB failure

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 detective, replace it.

Check loose contact of CN15 /shorted wire (pinched wire).

>>Replace Float switch if the wire is abnormal

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

02-16

Refer to error code table.

Page 55

Trouble shooting 7

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

30°C

12.620.726.935.246.662.3115Resistance Value (k )

20°C

16.1

15°C10°C5°C0°C-20°C -10°C -5°CTemperature

3.45 2.36 1.65Resistance Value (k )

50°C 60°C 70°C

5.187.97

40°CTemperature

Outdoor Temperature Thermistor Error

Outdoor Unit Main PCB Circuit Outdoor Temperature Thermistor

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

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-17

THERMISTOR

(DISCHARGE)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

THERMISTOR

(HEAT SINK)

BROWN

BLACK

BLUE

CN25 CN23 CN22 CN21

1 21 21 21 2

Refer to error code table.

Page 56

Trouble shooting 8

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

17.826.3

20°C

40.062.579.1101130169Resistance Value (k )

15°C10°C5°C0°CTemperature

OKOK

12.3

30°C

50°C40°C

60°C

0.52

180°C

0.79

160°C

1.222.003.434.606.278.69Resistance Value (k )

140°C120°C100°C

90°C80°C70°CTemperature

Outdoor Discharge Pipe Temperature Thermistor Error

Outdoor Unit Main PCB Circuit Discharge Pipe Temperature Thermistor

When Discharge Pipe Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-18

THERMISTOR

(DISCHARGE)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

THERMISTOR

(HEAT SINK)

BROWN

BLACK

BLUE

CN25 CN23 CN22 CN21

1 21 21 21 2

Refer to error code table.

Page 57

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 3 : Replace Controller PCB

Check Point 2 : Check Indoor Unit electric components

YESYES

Trouble shooting 9

INDOOR UNIT Error Method:

Indicate or Display:

Indoor EEPROM abnormal (Model No.)

Indoor Unit Controller PCB circuit

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

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

Check Point 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.

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.

Change Controller PCB.

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

When the model information being read from EEPROM has an apparent error.

02-19

Refer to error code table.

Page 58

Trouble shooting 10

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 1 : Check rotation of Fan

Check Point 2 : Check ambient temp. around motor

Indoor Fan Motor abnormal

Indoor Unit Controller PCB Circuit Indoor Fan Motor

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

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

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

Check excessively high temperature around the motor. (If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

When the condition that actual frequency of Indoor Fan is below 1/3 of target frequency is continued more than 56 seconds. Or the condition of fan speed is 0rpm is continued more than 56 seconds.

02-20

Indicate or Display:

Check Point 3 : Replace Controller PCB

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

Refer to error code table.

Page 59

Trouble shooting 11

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check Connection

Indicate or Display:Indicate or Display:

Check Point 3 : Check the voltage of power supply

Check Point 1-1 : Reset the power

YESYES

Check Point 1-2:

Check Point 4 : Check Serial Signal (Forward Transfer Signal)

Check Serial Signal (Forward Transfer Signal)

Outdoor Communication Signal Error (Forward Transfer Signal Error)

Indoor Unit Controller PCB Circuit

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

Does Error indication reappear?

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check the voltage of power supply

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal N - 3.

Check any loose or removed connection line of Indoor unit and Outdoor unit.

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

Check connection between Indoor Unit Controller PCB and Filter PCB. (If there is loose connector or open cable)

>> If it is abnormal, Controller PCB is failure. >> Replace Controller PCB

02-21

When the outdoor unit cannot receive the serial signal from Indoor unit more than 10seconds.

WHITE

BLACK

Refer to error code table.

Page 60

Trouble shooting 12 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

Compressor Temperature Thermistor Error

Outdoor Unit Main PCB Circuit Compressor Temperature Thermistor

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

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-22

THERMISTOR

(DISCHARGE)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

THERMISTOR

(COMPRESSOR)

THERMISTOR

(HEAT SINK)

BROWN

BLACK

BLUE

BROWN

CN25 CN26 CN23 CN22 CN21

1 21 21 21 21 2

Refer to error code table.

17.826.3

20°C

40.062.579.1101130169Resistance Value (k )

15°C10°C5°C0°CTemperature

12.3

30°C

50°C40°C

60°C

0.52

180°C

0.79

160°C

1.222.003.434.606.278.69Resistance Value (k )

140°C120°C100°C

90°C80°C70°CTemperature

For AO*30LMAW4

Page 61

Trouble shooting 13

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Point 2 : Check voltage of Main PCB (DC5.0V)

PRESSURE SWITCH 1

RED RED

CN37

1 2

PRESSURE SWITCH 2 (For AO*30LMAW4)

RED RED

CN36

1 2

Check Point 1 : Reset Power Supply and operate

Check Point 3 : Check Pressure Switch

YESYES

NONO

Pressure Switch Error

Outdoor Unit Main PCB Circuit Pressure Switch

1. Connector connection failure 2. Pressure Switch failure 3. Main PCB failure

When pressure switch open is detected in 10 seconds after the power is turned on.

Does abnormal LED indication show again?

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

If the voltage does not appear, replace Main PCB.

Check if connector is loose or cable is open.

>> If no abnormal connection is found, replace Pressure Switch.

After replacing Pressure Switch, check operating condition and pressure in operation.

02-23

Refer to error code table.

Page 62

Trouble shooting 14

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Compressor

(PARTS INFORMATION 2)

Indicate or Display:

Check Point 4 : Replace Main PCB

OKOK

Check Point 1 : Check connections of Outdoor Unit Electrical Components

IPM error

Outdoor Unit Main PCB Circuit Compressor

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

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

Check if connector is removed.

Check if the terminal connection is loose.

Check erroneous connection. Check if cable is open.

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

Check Point 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 ?

Check Outdoor Fan Motor. (Refer to Trouble shooting 18)

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

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

Check Compressor.

If Check Point 1, 2, 3 do not improve the symptom, change Main PCB.

When more than normal operating current to IPM in Main PCB flows, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

02-24

Refer to error code table.

Page 63

Trouble shooting 15

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Filter PCB and Main PCB

Check Point 4 : Replace Main PCB

YES

Indicate or Display:

CT error

Outdoor Unit Main PCB Circuit Outdoor Unit Filter PCB Circuit (Input current sensor unit)

Check Point 2 : Check connections of Outdoor Unit Electrical Components

Check if connector is removed.

Check if the terminal connection is loose.

Check erroneous connection. Check if cable is open.

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

Check Point 1-2 : Check external cause at Indoor and Outdoor (Voltage drop or Noise)

1. Defective connection of electric components 2. External cause 3. Filter PCB failure 4. Main PCB failure

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.

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

When Input Current Sensor has detected lower than 0.5A while Inverter Compressor is operating at higher than 56Hz, after 1minute upon starting the Compressor. (Except during the defrost operation)

02-25

Check DC voltage of CN1 (between 2 (Brown) and 3 (Red)) on Filter PCB.

>> After 40seconds upon starting the Compressor, If it is higher than 0.2V, Main PCB is failure. (Filter PCB is normal) >> Replace Main PCB >> If it is lower than 0.2V, Filter PCB is failure. >> Replace Filter PCB

If it does not improve the symptom, change Main PCB.

AO*18L/ 24L

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

Refer to error code table.

Page 64

Trouble shooting 16

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 3 : Check Active Filter Module

OKOK

Active Filter Module (AFM) error

Outdoor Unit Main PCB Circuit Active Filter Module

1. External cause 2. Connector connection failure 3. Active Filter Module failure ４. Main PCB failure

Check Point 2 : Check connection of Connector

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

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

Check Active Filter Module. (PARTS INFORMATION 3) >>If Active Filter Module is abnormal, replace it.

Check Point 4 : Replace Main PCB

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

Check Point 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.

02-26

When inverter input DC voltage is higher than 467V or lower than 237V. When a momentary power cut off occurred on low voltage.

Refer to error code table.

Page 65

Trouble shooting 17

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 1 : Check connection of around the Compressor components

OKOK

Indicate or Display:

Check Point 2 : Replace Main PCB

Outdoor Unit Main PCB Circuit

Compressor rotor location cannot detect (Permanent Stop)

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

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

Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

(Refer to PARTS INFORMATION 2)

For Compressor Terminal, Main PCB

While running the compressor, if the detected rotor location is out of phase with actual rotor location more than 90 degrees, the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

02-27

Refer to error code table.

Page 66

Trouble shooting 18

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Check Point 2 : Check ambient temp. around motor

Indicate or Display:

Outdoor Unit Fan Motor Error

Outdoor Unit Main PCB Circuit Outdoor Fan Motor

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

Check Point 1 : Check rotation of Fan

Rotate the fan by hand when operation is off. (Check if fan is caught, dropped off or locked motor)

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

Check excessively high temperature around the motor. (If there is any surrounding equipment that causes heat)

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Output Voltage of Main PCB

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

If the voltage is not correct, replace Main PCB.

When outdoor fan rotation speed is less than 100rpm in 20 seconds after fan motor starts, fan motor stops. After fan motor restarts, if the same operation within 60sec 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.

Read wire DC voltage

Red - Black

White - Black

300 400V

15 1.5V

〜

02-28

CN800

1 2 3 4 5 6 7

BLACK WHITE YELLOW BROWN

RED

FAN MOTOR

Refer to error code table.

For AO*30LMAW4

Page 67

Trouble shooting 19 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

Heat Sink Temperature Thermistor Error

Outdoor Unit Main PCB Circuit Heat Sink Temperature Thermistor

When Heat Sink Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-29

THERMISTOR

(DISCHARGE)

THERMISTOR

(PIPE)

THERMISTOR

(OUTDOOR)

THERMISTOR

(HEAT SINK)

BROWN

BLACK

BLUE

CN25 CN23 CN22 CN21

1 21 21 21 2

Refer to error code table.

30°C

6.109.7312.416.1

Resistance Value (k )

20°C

7.67

15°C10°C5°C0°C

Temperature

1.79

1.25 0.89

Resistance Value (k )

50°C

60°C 70°C

0.65

80°C

0.48

90°C

0.36

100°C

0.21

12.3 8.69 6.27 4.60 3.43 2.00

120°C

2.623.95

62.5101130169 79.1

17.826.340.0

40°C

Temperature

AO*18L/ 24L

AO*30L

AO*18L/ 24L

AO*30L

Page 68

Trouble shooting 20

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause :

Indicate or Display:

Compressor Start-up error (Permanent Stop)

On start-up the compressor, when detected rotor position is out of phase with actual rotor position more than 90 degrees,the compressor stops. After the compressor restarts, if the same operation is repeated within 40sec, the compressor stops again. If and repeats 5 times, the compressor stops permanently.

Outdoor Unit Main PCB Circuit

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

Check Point 1 : Check connection of around the Compressor components

OKOK

Check Point 2 : Replace Main PCB

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

Check if connector is removed.

Check erroneous connection. Check if cable is open.

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

(Refer to PARTS INFORMATION 2)

For Compressor Terminal, Main PCB

02-30

Refer to error code table.

Page 69

Trouble shooting 21 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

30°C

103176233312Resistance Value (k )

20°C

134

15°C10°C5°C0°C-10°C -5°CTemperature

39.6

25.6 17.1Resistance Value (k )

50°C

60°C 70°C

11.6

80°C

8.12

90°C

5.78

100°C

4.19 3.09

62.980.3

40°C

Temperature

2-way valve Temperature Thermistor Error

Outdoor Unit Main PCB Circuit 2-way valve Temperature Thermistor

When 2-way valve Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-31

BLACK RED RED RED RED RED RED RED

GRAY

BROWN

BLACK

BLUE

YELLOW

RED

BLACK WHITE WHITE WHITE WHITE WHITE WHITE WHITE

RED

WHITE

1 2 3 4 5 6 7 8

3 4

6 7 8

2 3 4 5 6 7 8

1 2 3 4 5 6 7 8

4 5 6

7 8 9

CN40

CN39

VALVE THERMISTOR A, B

2-WAY VALVE A

3-WAY VALVE A

2-WAY VALVE B

3-WAY VALVE B

2-WAY VALVE C

3-WAY VALVE C

ORANGE

GREEN

2-WAY VALVE D

3-WAY VALVE D

VALVE THERMISTOR C, D (For AO*30LMAW4)

Refer to error code table.

Page 70

Trouble shooting 22 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Check Point 2 :

Check Point 3 :

OKOK

30°C

103176233312Resistance Value (k )

20°C

134

15°C10°C5°C0°C-10°C -5°C

Temperature

39.6

25.6 17.1Resistance Value (k )

50°C

60°C 70°C

11.6

80°C

8.12

90°C

5.78

100°C

4.19 3.09

62.980.3

40°C

Temperature

3-way valve Temperature Thermistor Error

Outdoor Unit Main PCB Circuit 3-way valve Temperature Thermistor

When 3-way valve Temperature Thermistor open or short-circuit is detected at power ON or while running the compressor.

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

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

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

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

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

If the voltage does not appear, replace Main PCB.

02-32

BLACK

RED RED RED RED

RED

GRAY

BROWN

BLACK

BLUE

YELLOW

RED

BLACK WHITE

WHITE

WHITE WHITE

WHITE

RED

WHITE

1 2 3 4 5 6

3 4 5 6 7 8

1 2 3 4 5 6 7 8

4 5 6 7 8 9

CN40

CN39

VALVE THERMISTOR A, B

2-WAY VALVE A

3-WAY VALVE A

2-WAY VALVE B

3-WAY VALVE B

2-WAY VALVE C

3-WAY VALVE C

ORANGE

GREEN

2-WAY VALVE C

3-WAY VALVE C

Refer to error code table.

VALVE THERMISTOR C, D (For AO*30LMAW4)

Page 71

Trouble shooting 23

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

Connected Indoor unit error

Outdoor Unit Main PCB Circuit

When the total capacity of the connected indoor units exceed the connectable range of the total capacity.

1. The selection of connected indoor unit is incorrect 2.Main PCB failure

Check Point 1 : Check the total capacity of indoor unit

Check the total capacity of the connected indoor units.

02-33

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

Check Point 2 : Replace Main PCB

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

Trouble shooting 24

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Main CPU - Sub CPU communication error

Outdoor Unit Main PCB Circuit

When it cannot receive an effective signal for 10sec between the Main CPU and Sub CPU in outdoor unit.

1. Main PCB failure

Check Point 1 : Replace Main PCB

Change Main PCB.

Refer to error code table.

Page 72

Trouble shooting 25

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

Forced auto switch error

Indoor Unit Controller PCB Circuit Forced auto switch

When the Forced auto switch becomes ON for 10 consecutive seconds.

When the Forced auto switch becomes ON for 30 consecutive seconds.

1. Forced auto switch failure 2.Controller PCB failure

Check Point 1 : Check the Forced auto switch

Check if Forced auto switch is kept pressed.

02-34

Check Point 2 : Replace Controller PCB

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

Check ON/OFF switching operation by using a meter.

>>If Forced auto switch is detective, replace it.

Refer to error code table.

For AB*F/ AU*F/ AG*F

Page 73

02-35

Check Point 4 : Replace Controller PCB

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

Trouble shooting 26

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Power supply frequency detection error

Indoor Unit Controller PCB Circuit

The power supply frequency cannot be recognized after 4sec of power ON.

YESYES

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check any loose or removed connection line of Indoor unit and Outdoor unit.

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

Check connection between Outdoor Unit Main PCB and Filter PCB. (If there is loose connector or open cable)

Check Point 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

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

Refer to error code table.

Page 74

Trouble shooting 27

INDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Indicate or Display:Indicate or Display:

YESYES

Communication Error (Main PCB ---> Display PCB)

Indoor Unit Main PCB Circuit Display PCB

1. Connection failure 2. External cause 3. Display PCB failure 4. Main PCB failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check connection between Main PCB and Display PCB. (If there is loose connector or open cable)

Check Point 3 : Replace Display PCB

>> If Check Point 1, 2 do not improve the symptom, change Display PCB. (If the symptom does not change, replace Main PCB.)

When the Display PCB cannot receive the signal from the Main PCB.

02-36

Refer to error code table.

Page 75

Trouble shooting 28

OUTDOOR UNIT Error Method:

Detective Actuators:

Detective details:

Forecast of Cause:

Indicate or Display:Indicate or Display:

YESYES

Communication Error (Main PCB <--- Display PCB)

Indoor Unit Main PCB Circuit Display PCB

1. Connection failure 2. External cause 3. Display PCB failure 4. Main PCB failure

Check Point 1-1 : Reset the power and operate

Does Error indication show again?

Check Point 1-2:

Check external cause such as noise

Check the complete insulation of the grounding.

Check if there is any equipment that causes harmonic wave near the power cable (Neon light bulb or any electronic equipment which causes harmonic wave).

Check Point 2 : Check Connection

Check connection between Main PCB and Display PCB. (If there is loose connector or open cable)

Check Point 3 : Replace Display PCB

>> If Check Point 1, 2 do not improve the symptom, change Display PCB. (If the symptom does not change, replace Main PCB.)

When the Main PCB cannot receive the signal from the Display PCB.

02-37

Refer to error code table.

Page 76

Trouble shooting 30

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Discharge temperature error

Outdoor Unit Main PCB Circuit Discharge Pipe Temperature Thermistor

02-38

When the discharge temperature becomes higher than 110°C, the compressor stops.

Check Point 1 : Check if Gas Valve is open

If it is not open, open it and check the operation.

Check Point 3 : Check if gas leak or less gas

Measure Gas pressure, if there is a leak, correct it.

>>If recharging refrigerant, make sure to perform vacuuming and recharge the specified amount.

Check Point 5 : 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? (Check by hand and if it is locked, replace the motor) Check Outdoor Fan Motor.

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

Check Point 4 : Check Discharge Thermistor

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

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

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open? (Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

OK OK

MPa MPa

1. Valve is close 2. EEV failure 3. Gas Leak, less 4. Discharge Thermistor failure

5. Outdoor Fan Operation failure 6. Outdoor Heat Exchanger clogged

< Cooling mode >

< Heating mode >

Check Point 1 : Check if LIquid Valve is open

If it is not open, open it and check the operation.

Check Point 2 : Check EEV and Strainer

Are EEV and Strainer open? (Refer to PARTS INFORMATION 4)

>>If EEV or Strainer is defective, replace it.

Refer to error code table.

Page 77

Trouble shooting 32 OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

4-way valve error

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

5. Main PCB failure

Check Point 1 : Check connection of Connector

Check if connector is removed.

Check erroneous connection. Check if thermistor cable is open.

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

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

Remove CN30 from PCB and check the resistance value of coil. Resistance value is about 1.4k

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

02-39

[ Solenoid coil ]

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.

[ 4-way valve ]

OKOK

Check Point 4 : Replace Main PCB

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

Check Point 2 : Check thermistor

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

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

Refer to error code table.

Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor Room Temperature Thermistor 4-way valve

When the indoor heat exchanger temperature is compared with the room temperature, and either following condition is detected continuously two times, the compressor stops.

Cooling or Dry operation [Indoor heat exchanger temp.] - [Room temp.] > 10degC

Heating operation [indoor heat exchanger temp.] - [Room temp.] < -10degC

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

Page 78

Trouble shooting 34

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

VDD permanence stop protection (Electric air clean)

Electric air clean unit Indoor Unit Controller PCB Circuit

When the air cleanness monitor trial protection operates 4 times.

1. Electric air clean unit failure 2. Controller PCB failure

Check Point 1 : Check the Electric air clean unit

Check the Micro switch in Electric air clean unit. (Check ON/OFF switching operation by using a meter.)

Check the front panel is closed.

02-40

Check Point 2 : Replace Controller PCB

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

Check Point 2 : Replace Controller PCB

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

Trouble shooting 35

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

OKOK

Reverse-VDD permanence stop protection (Electric air clean power supply circuit abnormal)

Electric air clean unit Indoor Unit Controller PCB Circuit

The air clean operation signal was detected for 1 minute at the time of air clean mode OFF.

1. Electric air clean unit failure 2. Controller PCB failure

Check Point 1 : Replace Electric air clean unit

Change Electric air clean unit.

>>If Micro switch is detective, replace Electric air clean unit.

Refer to error code table.

Page 79

Trouble shooting 38

INDOOR UNIT

OUTDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Main relay welded error

Outdoor Unit Main PCB Circuit Main relay

When the signal from the outdoor unit is input after 2min.20sec. from the time of operation stop under the Main relay is OFF condition.

1. Main relay 2. Main PCB failure

02-41

Check Point 1 : Replace Main PCB

Change Main PCB.

Refer to error code table.

Page 80

02-42

Trouble shooting 39

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Damper error

(Upper & Lower air flow) (Upper air flow)

Indoor unit Controller PCB Circuit Limit switch Damper

When damper opening recovery operation repeats 6 times.

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

4. Controller PCB failure

Refer to error code table.

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

Check Point 1 : Check Limit switch

Check Point 4 : Replace Controller PCB

OKOK

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

>>If Limit switch is detective, replace it.

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

>>Replace Limit switch if the wire is abnormal

Check Point 2 : Check Point 3 : Check Damper

OKOK

>>Replace Damper if the damper is abnormal

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

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

Page 81

02-43

Trouble shooting 40

INDOOR UNIT

INDOOR UNIT Error Method:

Indicate or Display:

Detective Actuators:

Detective details:

Forecast of Cause :

Damper error

Indoor unit Controller PCB Circuit Limit switch

When close detecting sw and open detecting sw operates simultaneously.

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

Refer to error code table.

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

Check Point 1 : Check Limit switch

Check Point 3 : Replace Controller PCB

OKOK

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

>>If Limit switch is detective, replace it.

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

>>Replace Limit switch if the wire is abnormal

OKOK

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

Page 82

Trouble shooting 41

Forecast of Cause:

YESYES

OKOK

Indoor Unit - No Power

1. Power Supply failure 2. External cause

3. Electrical Components defective

Check Point 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.

Check Point 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.

Check Point 3 : Check Electrical Components

Check Voltage of power supply.

>> Check AC198 - 264V appears at Indoor Unit Terminal L - N (Power Supply).

Check Fuse (F101) in Filter PCB.

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

Check Varistor (VA101, VA102) in Filter PCB.

>> If Varistor is defective, there is a possibility of an abnormal power supply. Check the correct power supply and replace Varistor.

If the symptom does not change by above Check3, replace Filter PCB.

02-44

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Page 83

Trouble shooting 42

Forecast of Cause:

Check Point 3 : Check Electrical Components

OKOK

YESYES

Check Point 1 : Check Installation Condition

Outdoor Unit - No Power

1. Power Supply failure 2. External cause

3. Electrical Components defective

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.

Check Point 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.

Check the voltage of power supply.

>> Check if AC198 - 264V appears at Outdoor Unit Terminal L - N.

YESYES

Check Fuse (F2, F4) in Main PCB.

>> If Fuse is open, check loose terminal or removed connector (CN1) , and replace Fuse.

Check Varistor in Main PCB (VA103).

>> 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.

If the symptom does not change by above Check 3, replace Main PCB.

Check Active Filter Module. (PARTS INFORMATION 3) >>If Active Filter Module is abnormal, replace it.

02-45

Page 84

Trouble shooting 43

Forecast of Cause:

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

Check Point 1 : Check indoor and outdoor installation condition

Check Point 3 : Check Electrical Components at Indoor and Outdoor

OKOK

No Operation (Power is ON)

1. Setting/ Connection failure 2. External cause

3. Electrical Component defective

Indoor Unit - Check incorrect wiring between Indoor Unit - Remote Control, or terminals between Indoor Units. 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?

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.

Check Voltage at CN17 of Controller PCB. (Power supply to Remote Control)

>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.

02-46

Page 85

Attention

Trouble shooting 44

Forecast of Cause:

Check Point 2 : Check Outdoor Unit Operation

Check Point 1 : Check Indoor Unit

Check Point 3 : Check Site Condition

Check Point 5 : Check Refrigeration Cycle

Check Point 4 : Check Indoor/ Outdoor Installation Condition

Pipe (In) Pipe (Out)

OKOK

MPa MPa

No Cooling / No Heating

1. Indoor Unit error 2. Outdoor Unit error

3. Effect by Surrounding environment

4. Connection Pipe / Connection Wire failure 5. Refrigeration cycle failure

Does Indoor Unit FAN run on HIGH FAN?

Is Air Filter dirty? Is Heat Exchanger clogged?

Check if Energy save function is operated.

Check if Outdoor Unit is operating (If not, refer to Trouble shooting 30)

Check any objects that obstruct the air flow route.

Check clogged Heat Exchanger.

Is the Valve open?

Is capacity of Indoor Unit fitted to Room size?

Any windows open? Or direct sunlight ?

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.

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 (PARTS INFORMATION 4)

Check Compressor (PARTS INFORMATION 1,2)

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.

02-47

Page 86

Trouble shooting 45

Forecast of Cause :

Trouble shooting 46

Forecast of Cause:

OKOK

Abnormal Noise

1. Abnormal installation(Indoor/ Outdoor) 2. Fan failure(Indoor/ Outdoor)

3. Compressor failure (Outdoor)

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

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?

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

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

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

Water Leaking

Diagnosis method when water is spitting out.

Is the filter clogged?

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

Diagnosis method when water leak occurs

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

Is Drain Hose clogged?

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

Is Fan rotating?

>> Check Fan Motor (PARTS INFORMATION 5)

02-48

OKOK

MPa MPa

Is Float Switch defective?

>> Check Float Switch (Refer to Trouble Shooting 6)

1. Erroneous installation 2. Drain hose failure 3. Float Switch failure

Page 87

SERVICE PARTS INFORMATION 1

MPa

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)

Check if Strainer is clogged. (PARTS INFORMATION 4)

>> If there is no failure, the defect of Compressor can be considered. (Compression part broken or valve defective.)

Abnormal noise

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

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

02-49

2-4 SERVICE PARTS INFORMATION

MPa

Page 88

SERVICE PARTS INFORMATION 2

Check Point 1 : Check Connection

UU(RED)(RED)

V V (WHITE)(WHITE)WW

(BLACK)(BLACK)

Terminal cover opened

Check Point 2 : Check Winding Resistance

Check Point 3 : Replace Main PCB

Inverter Compressor

Check terminal connection of Compressor (loose or incorrect wiring)

Check connection of Main PCB (Loose or incorrect wiring)

Check winding resistance of each terminal

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

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

Resistance Value : 1.41 ( at 20°C )

Resistance Value : 0.88 ( at 20°C )

02-50

MAIN PCB

W304

W305 W303

RED

WHITE

BLACK

Compressor

For AO*18LMAK2/ 24LMAM2

For AO*30LMAW4

Page 89

SERVICE PARTS INFORMATION 3

Active Filter Module

02-51

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

Check Point 2 : Check the Output DC voltage (between P and N1)

L2L1

Power factor control

(+)

( )

Check the Output DC voltage (between P and N1) of compressor stopping and operating.

If it is abnormal,replace ACTIVE FILTER MODULE

Remove connector, check the open or short-circuit and the diode in the module

>> If the output voltage of compressor operating is less than the output voltage of compressor stopping, Active Filter Module is detective. >> Replace Active Filter Module

Terminal

Resistance value

L1,L2

Control Box

(+)

( )

Tester(+) Tester(-)

Check the open or short-circuit

Check the diode

360k

720k

1.65M /

20%

360k

20%

(Ref. value 1)

1.14M

(Ref. value 2)

1.01M /

(Ref. value 1)

761k

(Ref. value 2)

Terminal

Resistance value

Tester(+) Tester(-)

1.32M /

(Ref. value 1)

663k

(Ref. value 2)

1.01M /

(Ref. value 1)

762k

(Ref. value 2)

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

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

Page 90

SERVICE PARTS INFORMATION 4

Check Point 2 : Check Coil of EEV

Yellow - Brown

Orange - Red

Blue - Brown

White - Red

Read wire

46 4

Resistance value

Check Point 1 : Check Connections

Check Point 3 : Check Voltage from Main PCB.

Check Point 4 : Check Noise at start up

at 20°C

Outdoor unit Electronic Expansion Valve ( EEV )

Check connection of connector ( Loose connector or open cable )

Remove connector, check each winding resistance of Coil.

If Resistance value is abnormal, replace EEV.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Turn on Power and check operation noise.

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

02-52

EXPANSION VALVE COIL A

EXPANSION VALVE COIL B

CN27

WHITE

YELLOW

ORANGE

BLUE

BROWN

RED

1 2 3 4 5 6

E V

CN27

WHITE

YELLOW

ORANGE

BLUE

BROWN

RED

1 2 3 4 5 6

E V

EXPANSION VALVE COIL A

EXPANSION VALVE COIL B

EXPANSION VALVE COIL C

EXPANSION VALVE COIL D

CN27

CN50

CN51

RED

WHITE

YELLOW

ORANGE

BLUE

BROWN

RED

BLACK WHITE WHITE WHITE WHITE WHITE

BROWN BLUE

ORANGE YELLOW WHITE

WHITE

GREEN

BLACK

GREEN GREEN GREEN GREEN

RED BROWN BLUE ORANGE YELLOW WHITE

GREEN

1 2 3 4 5 6

1 3

4 5 6 7

4 5 6

E V

CN52

GREEN

BLACK

GREEN GREEN GREEN GREEN

RED BROWN BLUE ORANGE YELLOW WHITE

GREEN

1 2 3 4 5 6

1 3 4 5 6

E V

For AO*18LMAK2 / AO*24LMAM2 For AO*30LMAW4

Page 91

Check Point 5 : Check Opening and Closing Operation of Valve

Pipe (In)

Pipe (Out)

Hi TEMP.

Pipe (In)

Hi TEMP.

Normal TEMP.

CLOSE Example : Hot Gas

OPEN Example : Hot Gas

Pipe (Out)

Hi TEMP.

Pipe (In) Pipe (Out)

Check Point 6 : Check Strainer

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

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

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.

02-53

Page 92

SERVICE PARTS INFORMATION 5

Check Point : AB*14/ 18/ 24LBAJ

Red Pink

Pink Violet

Violet Blue

Red Black

White Red

Read Wire

445 8%

346 8%

124 8%

80.0 8%

Resistance value

(AC)

Thermal protector

VIOLET

BLUE

PINK

RED

BLACK

WHITE

140°C

at 20°C

Indoor Unit Fan Motor

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

02-54

AB*14LBAJ

Red Pink

Pink Violet

Violet Blue

Red Black

White Red

Read Wire

222 8%

175 8%

279 8%

63.5 8%

Resistance value

at 20°C

AB*24LBAJ

Red Pink

Pink Violet

Violet Blue

Red Black

White Red

Read Wire

291 8%

204 8%

182 8%

78.5 8%

Resistance value

at 20°C

AB*18LBAJ

Check Point : AR*9LUAB/ 12/ 14/ 18/ 22LUAD

(AC)

Thermal protector

VIOLET

BLUE

PINK

RED

BLACK

WHITE

150°C

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

Red Pink

Pink Violet

Violet Blue

Red Black

White Red

Read Wire

90.3 8%

152 8%

222 8%

42.9 8%

Resistance value

at 20°C

AR*12/ 14/ 18/ 22LUAD

Red Pink

Pink Violet

Violet Blue

Red Black

White Red

Read Wire

367 8%

145 8%

160 8%

62.6 8%

Resistance value

at 20°C

AR*9LUAB

Page 93

Check Point : AU*12/ 14/ 18LBAB

(AC)

VIOLET

BLUE

YELLOW

PINK

RED

BLACK

WHITE

Thermal protector

140°C

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

02-55

Red Pink

Pink Violet

Violet Blue

Blue Black

White Red

Read Wire

431 8%

10.7 8%

55.5 8%

35.7 8%

Resistance value

at 20°C

AU*18LBAB

Red Pink

Pink Violet

Violet Blue

Blue Black

White Red

Read Wire

427 8%

191 8%

92.8 8%

Resistance value

at 20°C

AU*12/ 14LBAB

Check Point : AS*18/ 24LBAJ

(AC)

BLUE

YELLOW

RED

BLACK

WHITE

Thermal protector

140°C

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

Blue Red

Blue Black

White Red

Read Wire

129 8%

21.0 8%

277 8%

Resistance value

at 20°C

Check Point : AS*7/ 9/ 12LMACW

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

White Yellow

Black Yellow

Read Wire

138 8%

136 8%

Resistance value

at 20°C

(AC)

Thermal protector

WHITE

YELLOW

BLACK

Page 94

SERVICE PARTS INFORMATION 6

Check Point : AO*18LMAK2/ 24LMAM2

Red - Blue

Red - Black

White - Red

Read Wire

96.3

54.7

185 8%

Resistance value

(AC)

Thermal protector

BLUE

RED

BLACK

WHITE

150°C

at 20°C

Outdoor Unit Fan Motor

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

02-56

Page 95

3 . REPLACEMENT PARTS

R410A

INVERTER (MULTI )

Universal Floor / Ceiling Duct / Cassette Wall Mounted / Floor type

Page 96

Compressor

PTC Thermistor

Thermistor (Discharge temp.)

Thermistor (2-way valve temp.)

Thermistor (3-way valve temp.)

1. REPLACEMENT PARTS (For OUTDOOR UNIT)

1-1 For AO*18LMAK2/ 24LMAM2

1-1-1 PARTS LAYOUT DRAWING

03-01

Fan motor

Fan

Heat Exchanger

Coil (Expansion valve)& Expansion valve

Solenoid

Main PCB

Active Filter Module

Pressure SW

Accumulator

4-way valve

Page 97

Thermistor (Heat exchanger temp.)

2-way valve (Liquid)

3-way valve (Gas)

03-02

Thermo Holder& Thermistor (Outdoor Temp.)

Page 98

BIND (Thermistor (Heat exchanger temp.)) (Thermistor (Outdoor temp.))

BIND (Thermistor (Outdoor temp.))

1-1-2 WIRING (For AO*18LMAK2/ 24LMAM2)

03-03

CLAMP Solenoid wire Fan motor wire Fan capacitor wire

Compressor wire

BIND Thermistor (Discharge temp.) Thermistor (2/3-way valve temp.) Thermistor (Heat exchanger temp.) Thermistor (Outdoor temp.) PTC Thermistor Coil (Expansion valve)X2 Pressure SW

Page 99

1. TOP PANEL removal

Remove the 5 mounting screws. Remove the TOP PANEL upward.

2. CONTROL BOX COVER removal

Remove the 3 mounting screws. Remove the CONTROL BOX COVER and TERMINAL COVER.

REAR VIEW

1-1-3 DISASSEMBLY PROCESS (For AO*18LMAK2/ 24LMAM2)

03-04

TOP PANEL

CONTROL BOX COVER

TERMINAL COVER

Page 100

3. MAIN PCB removal

Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -A,-B) Remove the MAIN PCB.

03-05

VIEW - A

DETAIL C

VIEW - B

Thermistor (Discharge temp.) (Yellow)

Thermistor (2/3-way valve temp.) (White)

Thermistor (Heat EX temp.) (Red)

Thermistor (Heat sink) (Black)

Thermistor (Outdoor temp.) (Blue)

Pressure SW (Red)

PTC Thermistor (Green)

Coil(Expansion valve) (Red)

Coil(Expansion valve) (White)

Solenoid (White)

Fan motor

SCREW

Compressor

Red

White

Black

Twist 3 times or more

Active Filter Module

" TM104 " (Yellow)

" TM105 " (Blue)

From CN407

" + " (Red) " - " (Black)

" P " (White) " N1 " (Purple)

" L2 " (White)

" L1 " (White)

UNIT A

POWER

UNIT B

1 1

2(N) 2(N)

3 3

LABEL Wire UNIT A: 1 W4(Black) UNIT A: 2 W5(White) UNIT A: 3 W8(Red) UNIT B: 1 W6(Black) UNIT B: 2 W7(White) UNIT B: 3 W9(Yellow) POWER: L Fuse holder (Black) POWER: N W2(White)

Fujitsu AB*F18LAT, AB*F14LAT, AB*F24LAT, AR* 9LUAB, AR*12LUAD Service Instruction

Fujitsu ABF18LAT, ABF14LAT, ABF24LAT, AR 9LUAB, AR*12LUAD Service Instruction