Fujitsu AOU24RLX, AOU42RLX, AUU42RCLX, AUU24RCLX, AOU18RLX User Manual

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SPLIT TYPE ROOM AIR CONDITIONER

CASSETTE

SERVICE

INSTRUCTION

Models Indoor unit Outdoor unit

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

type

INVERTER

AOU18RLX AOU24RLX AOU36RLX AOU42RLX

R410A

CONTENTS

1. DESCRIPTION OF EACH CONTROL OPERATION

1. COOLING OPERATION..............................................................................................

2. HEATING OPERATION..............................................................................................

3. DRY OPERATION......................................................................................................

4. AUTO CHANGEOVER OPERATION.........................................................................

5. INDOOR FAN CONTROL...........................................................................................

6. OUTDOOR FAN CONTROL.......................................................................................

7. LOUVER CONTROL...................................................................................................

8. COMPRESSOR CONTROL........................................................................................

9. TIMER OPERATION CONTROL................................................................................

10. ELECTRONIC EXPANSION VALVE CONTROL........................................................

11. TEST OPERATION CONTROL..................................................................................

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

13. 4-WAY VALVE EXTENSION SELECT.......................................................................

14. AUTO RESTART........................................................................................................

15. PUMP DOWN ( Refrigerant collecting operation )......................................................

16. COMPRESSOR PREHEATING..................................................................................

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

17.

18. DRAIN PUMP OPERATION.......................................................................................

19. ENERGY SAVE FUNCTION.......................................................................................

20. VARIOUS PROTECTIONS.........................................................................................

01-01 01-02 01-03 01-04 01-05 01-07 01-08 01-09 01-10 01-12 01-12 01-12 01-12 01-12 01-13

01-13 01-13

01-15 01-15 01-16

2. TROUBLE SHOOTING

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

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

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

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

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

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

02-01 02-01 02-03

02-04 02-24

02-29

3. REPLACEMENT PARTS

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

1-1 For AOU18/ 24/ 36RLX...........................................................................................

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

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

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

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

1-2 For AOU42RLX.......................................................................................................

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

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

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

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

2 REPLACEMENT PARTS ( For INDOOR UNIT )...........................................................

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

03-01 03-01 03-01 03-03 03-04 03-09

03-15 03-15 03-17 03-19 03-25

03-30 03-30

CASSETTE type

INVERTER

R410A

1 . DESCRIPTION OF EACH

CONTROL OPERATION

1. COOLING OPERATION

1-1 COOLING CAPACITY CONTROL

A sensor (room temperature thermistor) built in the indoor unit will usually perceive difference or variation between a set temperature and present room temperature, and controls the operation frequency of the compressor.

* If the room temperature is 3.6 degF(2 degC) higher than a set temperature,

the compressor operation frequency will attain to maximum performance.

* If the room temperature is 3.6 degF(2 degC) lower than a set temperature, the compressor

will be stopped.

* When the room temperature is between +3.6 degF(+2 degC) to -3.6 degF(-2 degC) of

the setting temperature, the compressor frequency is controlled within the range shown in Table1. However, the maximum frequency is limited in the range shown in Figure 1 based on the fan speed mode and the outdoor temperature.

( Table 1 : Compressor Frequency Range )

minimum frequency

AUU18RCLX 20Hz AUU24RCLX AUU36RCLX AUU42RCLX

20Hz 20Hz 25Hz

maximum frequency

63Hz 80Hz 90Hz 92Hz

( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )

Outdoor air temperature

87.8°F (31°C)

66.2°F (19°C)

51.8°F (11°C)

A zone

B zone

C zone

D zone

AUU18RCLX

AUU24RCLX

AUU36RCLX

AUU42RCLX

Fan speed mode

A zone 63Hz Bzone C zone D zone Azone Bzone Czone D zone Azone Bzone C zone D zone Azone Bzone C zone D zone

Hi Me Lo

45Hz 45Hz 35Hz 35Hz 80Hz 55Hz 45Hz 45Hz 90Hz 75Hz 70Hz 63Hz 92Hz 72Hz 60Hz 60Hz

35Hz

35Hz 35Hz

30Hz

55Hz

45Hz

35Hz

75Hz

70Hz

63Hz

55Hz

72Hz

60Hz

53Hz

45Hz 35Hz

30Hz 55Hz 45Hz 45Hz 35Hz 75Hz 70Hz 63Hz 55Hz 72Hz 60Hz 60Hz 53Hz

01-01

2. HEATING OPERATION

2-1 HEATING CAPACITY CONTROL

* If the room temperature is lower 5.4 degF(3 degC) than a set temperature,

the compressor operation frequency will attain to maximum performance.

* If the room temperature is higher 3.6 degF(2 degC) than a set temperature, the compressor

will be stopped.

* When the room temperature is between +3.6 degF(+2 degC) to -5.4 degF(-3 degC) of

the setting temperature, the compressor frequency is controlled within the range shown in Table2. However, the maximum frequency is limited in the range shown in Figure 2 based on the outdoor temperature.

( Table 2 : Compressor Frequency Range )

minimum frequency

AUU18RCLX 20Hz AUU24RCLX AUU36RCLX AUU42RCLX

20Hz 20Hz 23Hz

maximum frequency

87Hz 87Hz 95Hz 92Hz

( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )

Outdoor air temperature

68°F

(20°C)

60.8°F (16°C)

53.6°F (12°C)

41°F

(5°C)

E zone

D zone

C zone

B zone

A zone

AUU18RCLX

AUU24RCLX

AUU36RCLX

AUU42RCLX

A zone 87Hz Bzone C zone Dzone E zone Azone Bzone Czone Dzone Ezone Azone Bzone Czone D zone Ezone Azone B zone C zone D zone Ezone

Limit of Maximum

Frequency

85Hz 70Hz 70Hz 60Hz 87Hz 85Hz 70Hz 70Hz 60Hz 95Hz 95Hz 90Hz 80Hz 80Hz 92Hz 92Hz 90Hz 80Hz 80Hz

01-02

3. DRY OPERATION

3-1 INDOOR UNIT CONTROL

The compressor rotation frequency shall change according to set temperature and room temperature variation which the room temperature sensor of the indoor unit has detected as shown in the Table 3.

( Table 3 : Compressor frequency )

Operating frequency

AUU18RCLX 25Hz AUU24RCLX AUU36RCLX AUU42RCLX

( Fig.3 : Compressor Control based on Room Temperature )

Room temperature

Compressor ON

Ts+1.8 degF

(1 degC)

Compressor OFF

30Hz 45Hz 30Hz

Room temperature

Ts+2.7 degF

(1.5 degC)

Ts : Setting temperature

( Fig.4 : Indoor Fan Control )

Compressor

OFF

Indoor fan

air flow mode

OFF

Air flow mode : Lo

30 5 30 120 5 (sec)

180 180

01-03

4. AUTO CHANGEOVER OPERATION

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 64°F(18°C) and 88°F(30°C) in 2 degF(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 4 : Operation mode selection table )

Room temperature :TR

TR>Ts+3.6degF

(2 degC)

Ts +3.6 degF > TR > Ts-3.6 degF

(2 degC) (2 degC)

Ts +3.6 degF>TR

(2 degC)

Ts : Setting 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.

Operation mode

Cooling

Monitoring

Heating

01-04

5. INDOOR FAN CONTROL

1. Fan speed

( Table 5 : Indoor Fan Speed )

AUU18RCLX

Operation mode Air flow mode Speed (rpm)

Heating

Cooling

Hi 400

S-Lo

Hi 450

S-Lo

350 310 250

390 330 250

AUU36RCLX

Operation mode Air flow mode Speed (rpm)

Heating

Cooling

Hi 580

S-Lo

Hi 580

S-Lo

510 440 300

AUU24RCLX

Operation mode Air flow mode Speed (rpm)

Heating

Cooling

Hi 440

S-Lo

Hi 490

S-Lo

380 330 250

430 360 250

AUU42RCLX

Operation mode Air flow mode Speed (rpm)

Heating

Cooling

Hi 620

S-Lo

Hi 620

S-Lo

550 470 300

2. FAN OPERATION

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

When [AUTO] is selected, the indoor fan motor runs LO and OFF at 1 minute intervals.

3. COOLING OPERATION

Switch the airflow [AUTO], and the indoor fan motor will run according to a room temperature, asshowninFigure5. On the other hand, if switched in [HIGH] [LOW], the indoor motor will run at a constant airflow of [COOL] operation modes LOW, MED, HIGH,as shown in Table 5.

( Fig.5 : Airflow change - over ( Cooling : AUTO ) )

When the room temperature rises

TR : Room temperature Ts : Setting temperature

TR-Ts > 3.6 degF

(2 degC)

3.6 degF > TR-Ts > 1.8 degF (2 degC) (1 degC)

1.8 degF > TR-Ts (1 degC)

HIGH mode

MED mode

LOW mode

When the room temperature drops

TR-Ts > 5.4 degF

(3 degC)

5.4 degF > TR-Ts > 3.6 degF (3 degC) (2 degC)

3.6 degF > TR-Ts (2 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.

01-05

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 6.

On the other hand, if switched in [HIGH] [LOW], the indoor motor will run at a constant airflow of [COOL] operation modes LOW, MED, HIGH, as shown in Table 5.

( Fig.6 : Airflow change - over ( Heating : AUTO ) )

Indoor heat exchanger temperature

116.6°F

Go up one-step

(47°C)

Hold

105.8°F (41°C)

Go down one-step

5. COOL AIR PREVENTION CONTROL (Heating mode)

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

( Fig.7 : Cool Air Prevention Control )

Indoor heat exchanger temperature

SETTING

91.4°F (33°C)

FAN MODE

LO mode

86°F

(30°C)

S-LOW mode

Indoor heat exchanger temperature

86°F

(30°C)

6. DRY OPERATION

Refer to the Figure 4. During the dry mode operation, the fan speed setting can not be changed.

01-06

6. OUTDOOR FAN CONTROL

1. Outdoor Fan Motor

Following table shows the fan speed of the outdoor unit.

( Table 6 : Fan speed of the outdoor unit )

Cooling Heating

AUU18RCLX AUU24RCLX AUU36RCLX

AUU42RCLX

AUU42RCLX has two fan motors.

The outdoor fan speed changs in the range mentioned avobe depending on the compressor

frequency and outdoor temperature. (When the compressor frequency and outdoor temperature increase, the outdoor fan speed

also changes to the higher speed. When the compressor frequency and outdoor temperature decrease, the outdoor fan speed also changes to the lower speed.)

For AUU18RCLX

It runs at 250rpm for 20 seconds after starting up the outdoor fan. When the outdoor heat exchanger tenperature is lower than 35.6°F (2°C), the fan speed switches to 780rpm on heating mode.

For AUU24RCLX / AUU36RCLX

It runs at 250rpm for 20 seconds after starting up the outdoor fan. When the outdoor heat exchanger tenperature is lower than 35.6°F (2°C), the fan speed switches to 900rpm on heating mode.

For AUU42RCLX

It runs at 500rpm for 20 seconds after starting up the outdoor fan. When the outdoor heat exchanger tenperature is lower than 35.6°F (2°C), the fan speed switches to 900rpm(Upper fan) and 850rpm(Lower fan) on heating mode.

Upper fan Lower fan

780/ 400/ 250/ 220/ 200 rpm

900/ 850/ 780/ 400/ 250/ 220/ 200 rpm 900/ 780/ 400/ 250/ 220/ 200 rpm

850/ 780/ 400/ 350/ 300 rpm

780/ 750/ 350/ 0 rpm

780/ 400/ 250/ 220/ 200 rpm

900/ 850/ 780/ 350/ 200/ 170/ 150 rpm

850/ 780/ 750/ 350/ 200/ 170/ 150 rpm

01-07

7. LOUVER CONTROL

1. VERTICAL LOUVER CONTROL

(Function Range)

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

(Operation Range)

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 Heating mode Downward flow

For AUU18/ 24RCLX 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)

Horizontal flow

(Fig.8 : Air Direction Range)

For AUU36/ 42RCLX 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)

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

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)

Airflow direction set Range of swing

to to to to

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

01-08

8. COMPRESSOR CONTROL

1. OPERATION FREQUENCY RANGE

The operation frequency of the compressor is different based on the operation mode as shown in Table 7.

(Table 7 : Compressor Operation Frequency Range)

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

Cooling Heating

Min Max Min Max

20Hz 20Hz

20Hz 25Hz

63Hz 80Hz 90Hz

92Hz

20Hz 20Hz 20Hz 23Hz

87Hz 87Hz 95Hz 92Hz

Dry

25Hz 30Hz 45Hz 30Hz

2. OPERATION FREQUENCY CONTROL AT START UP

The compressor frequency soon after the start-up is controlled as shown in Figure 9.

(Fig.9 : Compressor Control at Start-up)

Frequency

Hold

(Frequency)

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

(Time)

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

Time A Time B Time C

Time E

For AUU18/ 24/ 36RCLX

Frequency

40Hz

56Hz

Time A Time B Time C Time D Time E

180sec

Frequency

56Hz

70Hz

60sec

80sec

120sec

180sec

1 Discharge pipe temp. > 50°F (10°C) ,86°F (30°C)

2 Discharge pipe temp. < 50°F (10°C) ,86°F (30°C)

For AUU42RCLX 1 Discharge pipe temp. > 50°F (10°C) ,95°F (35°C)

2 Discharge pipe temp. < 50°F (10°C) ,95°F (35°C)

120sec

180sec

Time D

720sec

(Cooling) (Heating)

01-09

9. TIMER OPERATION CONTROL

9-1 Wired Remote Controller

AR-3TA14

ON / TIMER OFF / TIMER

WEEKLY TIMER

TEMPERATURE SET BACK TIMER

1. ON / OFF TIMER

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

Operation mode

Stop mode

Set time of timer

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

Operation mode

Stop mode

Set time of timer

2. WEEKLY TIMER

2-1. WEEKLY TIMER

Use this timer function to set operating time for each day of the week. The weekly timer allows up to two ON and OFF time to set up per day.

Operation mode

Stop mode

Set time

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.

Operation mode

Stop mode

Set time Set time Set time

Operation mode

Stop mode

01-10

2-2. DAY OFF setting

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

Normal

DAY OFF

Operation mode

Stop mode

Preceding day Next day

Setting day

Stop mode

Next day setting

DAY OFF

Stop mode

Operation mode

Stop mode

Preceding day Next daySetting day

Operation mode

Stop mode

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

3. TEMPERATURE SET BACK TIMER

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 64°F(18°C) even if the SET BACK temperature is set to 62°F(17°C) or lower.

Case of SET BACK timer on the Cooling operation. ( Setting temperature :72°F(22°C), SET BACK temperature :80°F(26°C))

SET BACK setting

Operation temperature

*1: During the SET BACK function,

the setting temperature is changed.

80°F(26°C)

72°F(22°C)

80°F(26°C)

76°F(24°C)

72°F(22°C)

ON OFF OFFON

Chenge the setting temperature: 72°F(22°C) 76°F(24°C)

01-11

10. ELECTRONIC EXPANSION VALVE CONTROL

The most proper opening of the electronic expansion valve is calculated and controlled under the present operating condition based on the 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 50 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).

11. TEST OPERATION CONTROL

With Wired 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.

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

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

13. 4-WAY VALVE EXTENSION SELECT

At the time when the air conditioner is switched from the cooling mode to heating mode, the compressor is stopped, and the 4-way valve is switched in 3 minutes later after the compressor stopped.

14. 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

01-12

15. PUMP DOWN ( Refrigerant collecting operation )

Perform the following procedures to collect the refrigerant when moving the indoor unit or the outdoor unit.

When the product is stopped:

1. Press the PUMP DOWN switch (SW2) on the outdoor unit. (The LED on the outdoor unit circuit board flickers every 1second.)

2. The pump down operation (cooling operation) begins right away. After operation starts, close the 3-way valve (liquid).

3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.

4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that the LED has gone out.

When the product is operating:

1. Press the PUMP DOWN switch (SW2) on the outdoor unit. The LED on the outdoor unit circuit board flickers every 1second, and operation stops. At this point, recovery has not been completed, so do not close the 2 and 3-way valves.

2. The pump down operation (cooling operation) begins after 3minutes. Close the 3-way valve (liquid) after operation starts.

3. After 2-3minutes, operation stops. Close the 3-way valve (gas) within 1minute after operations stops.

4. The LED will go out 3minutes after it stops. Disconnect the power supply after confirming that the LED has gone out.

16. COMPRESSOR PREHEATING

When the outdoor heat exchanger temperature is lower than Operation temperature (Refer to Table 8) and the heating operation has (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

(Table 8 : Preheating Operation / Release Temperature)

been stopped for 3 hours, power is applied to the compressor and the compressor is heated.

is over.

Before 24 hour After 24 hour

Operation temperature

Release temperature

Operation temperature

Release temperature

AUU18RCLX AUU24RCLX AUU36RCLX

37.4°F (3°C)

44.6°F (7°C)

32°F (0°C)

39.2°F (4°C)

AUU42RCLX

17. DEFROST OPERATION CONTROL

1. CONDITION OF STARTING THE DEFROST OPERATION

The defrost operation starts when the outdoor heat exchanger temperature sensor detects the temperature lower than the values shown in Table 9.

(Table 9 : Condition of starting Defrost Operation)

Compressor integrating operation :45min and over

Less than 6 min. *1

or 10min. *2

Above 20min. Select 10min.

After 6 min. *1

or 10min. *2

°F(-8°C) *3

17.6 14

°F (-10°C) *4

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

Compressor integrating operation :Less than 45min.

Does not operate

*1. It means contiguous operation time. *2. Compressor stop time: Below 20min. Select 6min.

2. CONDITION OF THE DEFROST OPERATION COMPLETION

Defrost operation is released when the conditions become as shown in Table 10.

(Table 10 : Defrost Release Condition)

Release Condition

AUU18RCLX

AUU24RCLX

AUU36RCLX

AUU42RCLX

Outdoor heat exchanger temperature sensor value is higher than 53.6°F(12°C) or Compressor operation time has passed 15 minutes.

01-13

Outdoor temp. Outdoor heat exchanger temp.

21.6 degF (12

Outdoor heat exchanger temp.

degC)

-4

°F (-20°C)

*3. Outdoor temp. > 30.2°F (-1°C) *4. Outdoor temp. < 30.2°F (-1°C)

3. Defrost Flow Chart

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

Heating operation start : Compressor ON

(Not defrosted for 6 or 10 minutes)

Compressor integrating operation: 45 minutes and over

Outdoor temp. > 30.2°F

Outdoor heat exchanger temperarure: Below 17.6°F (-8°C)

(-1°C)

Defrost start

AUU18/ 24/ 36RCLX

Outdoor temp. < 30.2°F

(-1°C)

Outdoor heat exchanger temperarure: Below 14°F (-10°C)

Outdoor temp. > 30.2°F

Outdoor heat exchanger temperarure: Below 17.6°F (-8°C)

(-1°C)

Outdoor temp Outdoor heat exchanger temperature: Above 21.6 degF(12degC)

AUU42RCLX

Compressor integrating operation: 45 minutes and over

Outdoor temp. < 30.2 F

(-1°C)

Outdoor heat exchanger temperarure: Below 14°F (-10°C)

Outdoor heat exchanger temperarure: Below - 4°F (-20°C)

Defrost start

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

3 sec later Compressor OFF

3 sec later Outdoor fan motor OFF 28 sec later 4-way valve OFF 34 sec later compressor ON

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

Compressor ON time: Over 15 minutes

(Frequency : 92 Hz)

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

Compressor : 30 Hz Outdoor fan motor OFF 4-way valve OFF Compressor ON (Frequency : 92 Hz)

Defrost end

01-14

18. DRAIN PUMP OPERATION

During Cooling / Dry operation

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

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

3. When the compressor stops by the "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.

During Heating / Fan / Stop operation

1.When the water level in the drain pan rises up and then the float switch functions: Drain pump operates continuously for 3 minutes after the float switch is turned off.

(Almost condensing water may be drained)

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

19. ENERGY SAVE FUNCTION

1. During Cooling / Dry operation:

The thermostat temperature setting increases by 1.8 degF (1 degC) as soon as the ENERGY SAVE button is pressed, and then increases by 1.8 degF (1 degC) after 1 hour later. Afterwards, energy consumption is saved by continuing to cool or dry at a thermostat temperature of 3.6 degF (2 degC) higher than setting temperature.

ENERGY SAVE ON

1hour.

1.8 degF (1 degC)

3.6 degF(2degC)

Setting temperature

2. During Heating operation:

The thermostat temperature setting decreases by 1.8 degF (1 degC) as soon as the ENERGY SAVE button is pressed, and then decreases by another 1.8 degF (1 degC) every 30 minutes. Afterwards, energy consumption is saved by continuing to heat at a thermostat temperature of 7.2 degF (4 degC) lower than setting temperature.

ENERGY SAVE ON

1.8degF (1degC)

30min.

1 hour.

1 hour 30 min.

3.6degF (2degC)

5.4degF (3degC)

7.2degF (4degC)

Setting temperature

01-15

20. VARIOUS PROTECTIONS

1. DISCHARGE GAS TEMPERATURE OVER RISE PREVENTION CONTROL

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

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

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

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

(Table 11 : Discharge Temperature Over Rise Prevention Control / Release Temperature)

Temperature Temperature Temperature Temperature

AUU18RCLX AUU24RCLX AUU36RCLX AUU42RCLX

221°F (105°C) 212°F (100°C) 239°F(115°C) 176°F(80°C)

2. CURRENT RELEASE CONTROL

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

(Table 12 : Current Release Operation Value / Release Value)

[ Heating ]

AUU18RCLX

T0 > 68°F (20°C)

T0 < 68°F (20°C)

T0: Outdoor temperature

AUU24RCLX

T0 > 68°F (20°C)

T0 < 68°F (20°C)

T0: Outdoor temperature

780 rpm 400 rpm 250 rpm 220, 200 rpm

10.0A / 9.5A

12.0A / 11.5A

900, 780 rpm 400 rpm 250 rpm 220, 200 rpm

10.0A / 9.5A

12.0A / 11.5A

Outdoor unit fan speed

10.0A / 9.5A 8.0A / 7.5A 6.0A / 5.5A

Outdoor unit fan speed

10.0A / 9.5A 8.0A / 7.5A 6.0A / 5.5A

AUU36RCLX

T0 > 53.6°F (12°C)

53.6°F > T0 > 41°F

(12°C) (5°C)

T0 < 41°F (5°C)

T0: Outdoor temperature

Outdoor unit fan speed

780 rpm900 rpm 400 rpm 250 rpm 220 ,200 rpm

15.0A / 14.5A 15.0A / 14.5A 13.0A / 12.5A 10.0A / 9.5A 8.0A / 7.5A

18.0A / 17.5A

18.0A / 17.5A 18.0A / 17.5A 18.0A / 17.5A 18.0A / 17.5A

01-16

AUU42RCLX

Upper fan

Lower fan

T0 > 53.6°F (12°C)

T0 < 53.6°F (12°C)

T0: Outdoor temperature

[ Cooling ]

AUU18RCLX

T0 > 113°F (45°C)

= 113°F > T0 > 77°F

(45°C) (25°C)

77°F > T0 > 66.2°F

(25°C) (19°C)

66.2°F > T0 > 55.4°F

(19°C) (13°C)

55.4°F > T0 > 44.6°F

(13°C) (7°C)

44.6°F > T0 > 32°F

(7°C) (0°C)

T0 < 32°F (0°C)

T0: Outdoor temperature

Outdoor unit fan speed

900 ,850 ,780 ,350 rpm 200 rpm 170 rpm 150 rpm

850 ,780 ,750 ,350 rpm 200 rpm 170 rpm 150 rpm

20.0A / 19.5A

20.0A / 19.5A 20.0A / 19.5A 20.0A / 19.5A 20.0A / 19.5A

Outdoor unit fan speed

780 rpm 400 rpm 250 rpm 220, 200 rpm

8.0A / 7.5A 8.0A / 7.5A 5.0A / 4.5A 4.0A / 3.5A

10.0A / 9.5A

12.0A / 11.5A 12.0A / 11.5A

15.0A / 14.5A 12.0A / 11.5A 12.0A / 11.5A

7.0A / 6.5A

8.0A / 7.5A

8.5A / 8.0A

9.0A / 8.5A

5.0A / 4.5A

6.5A / 6.0A

7.5A / 7.0A

AUU24RCLX

T0 > 113°F (45°C)

= 113°F > T0 > 100.4°F

(45°C) (38°C)

100.4°F > T0 > 77°F

(38°C) (25°C)

77°F > T0 > 66.2°F

(25°C) (19°C)

66.2°F > T0 > 55.4°F

(19°C) (13°C)

55.4°F > T0 > 44.6°F

(13°C) (7°C)

44.6°F > T0 > 32°F

(7°C) (0°C)

T0 < 32°F (0°C)

T0: Outdoor temperature

Outdoor unit fan speed

900 ,850 rpm 780 rpm 400 rpm 250 rpm 220, 200 rpm

8.0A / 7.5A 8.0A / 7.5A 8.0A / 7.5A 5.0A / 4.5A 4.0A / 3.5A

10.0A / 9.5A 10.0A / 9.5A

12.0A / 11.5A

12.0A / 11.5A 12.0A / 11.5A

7.0A / 6.5A

8.0A / 7.5A

8.5A / 8.0A

9.0A / 8.5A

5.0A / 4.5A

6.5A / 6.0A

7.5A / 7.0A

01-17

AUU36RCLX

T0 > 113°F (45°C)

= 113°F > T0 > 100.4°F

(45°C) (38°C)

100.4°F > T0 > 66.2°F

(38°C) (19°C)

66.2°F > T0 > 55.4°F

(19°C) (13°C)

55.4°F > T0 > 44.6°F

(13°C) (7°C)

44.6°F > T0 > 32°F

(7°C) (0°C)

T0 < 32°F (0°C)

T0: Outdoor temperature

Outdoor unit fan speed

900 ,850 rpm 780 rpm 400 rpm 250 rpm 220, 200 rpm

10.0A / 9.5A 10.0A / 9.5A 10.0A / 9.5A 7.0A / 6.5A 5.5A / 5.0A

14.0A / 13.5A

18.0A / 17.5A

15.0A / 14.5A 15.0A / 14.5A

7.0A / 6.5A

12.0A / 11.5A

9.5A / 9.0A

AUU42RCLX

Upper fan

Lower fan

T0 > 113°F (45°C)

= 113°F > T0 > 87.8°F

(45°C) (31°C)

87.8°F > T0 > 77°F

(31°C) (25°C)

77°F > T0 > 66.2°F

(25°C) (19°C)

66.2°F > T0 > 55.4°F

(19°C) (13°C)

T0 < 55.4°F (13°C)

T0: Outdoor temperature

Outdoor unit fan speed

850 rpm 780 rpm 350 rpm 400 rpm 350, 300 rpm

750 rpm 780 rpm 350 rpm 0 rpm 0 rpm

12.0A / 11.5A 12.0A / 11.5A 12.0A / 11.5A 12.0A / 11.5A 12.0A / 11.5A

20.0A / 19.5A 20.0A / 19.5A

18.0A / 17.5A

20.0A / 19.5A

15.0A / 14.5A

18.0A / 17.5A

01-18

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 37.4°F(3°C). Then, the anti-freezing control is released when it becomes higher than 42.8°F(6°C).

(Fig 10 : Anti-freezing Protection Operation / Release Temperature)

Indoor heat exchanger temperature

The compressor frequency is

37.4°F (3°C)

42.8°F (6°C)

53.6°F (12°C)

decreased 10Hz every 120seconds.

Hold

Compressor OFF : Hold Compressor ON : Release of protection

Release of protection

When the compressor frequency becomes lower than minimum frequency, the compressor operates at minimum frequency. If the indoor heat exchanger temperature sensor detects the temperature lower than

37.4°F(3°C) after 2minutes upon operating the compressor at minimum frequency,

the compressor stops.

4. COOLING PRESSURE OVER RISE PROTECTION

When the outdoor unit heat exchange sensor temperature rises to

158.9°F (70.5°C) or greater,

the compressor is stopped and error display is indicated.

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 11 : Heating Overload Protection Control)

Indoor heat exchange temperature

Compressor is OFF

145.4°F (63°C)

129.2°F (54°C)

122°F

(50°C)

The compressor frequency is decreased 10Hz every 60seconds.

Hold

Compressor OFF :

Release of protection

Compressor ON :

The compressor frequency is increased 10Hz every 60seconds.

01-19

CASSETTE type

INVERTER

R410A

2 . TROUBLE SHOOTING

2. TROUBLESHOOTING

2-1 ERROR DISPLAY

2-1-1 WIRED REMOTE CONTROLLER DISPLAY

1. SELF - DIAGNOSIS

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

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

Display

SUMOTUWETH FR

Ex. Self-diagnosis

CLOCK ADJUST

SET BACK

DELETE SET

DAY

DAY OFF

ENERGY

SAVE

CLOCK ADJUST

SET BACK

DAY OFF

DELETE SET

DAY

SET

ENERGY

SAVE

THERMO SENSOR

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.

Error code

Error contents

Communication error (indoor unit remote control)

Communication error (Serial reverse transfer error)

Room temperature sensor open

Room temperature sensor short-circuited

Indoor heat exchanger temperature sensor open

Indoor heat exchanger temperature sensor short-circuited

Outdoor heat exchanger temperature sensor error

Water drain abnormal

Outdoor temperature sensor error

Outdoor discharge pipe temperature sensor error

Indoor EEPROM abnormal (Model No.)

Indoor fan motor abnormal

Outdoor communication signal error (Forward transfer signal error)

Compressor temperature sensor error

Pressure switch error

IPM error

CT error

Active filter module (AFM) error

Compressor rotor location cannot detect (permanent stop)

Outdoor unit fan motor error

Trouble shooting

1 2

5 6 7 8

9 10 11 12 13 14 15

16 17 18

Error code

02-01

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 , and the START/STOP button simultaneously for 5 seconds or more to start the self-diagnosis.

DAY

SUMOTUWETH FR

3. Press the START/STOP button.

Error code

Error history number

DAY

SUMOTUWETH FR

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

Lower

DAY

Raise

01234 567

FEdcbA98

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.

02-02

2-1-2 OUTDOOR UNIT DISPLAY

1. ERROR DISPLAY

Error contents

Outdoor communication signal error (Forward transfer signal error)

Outdoor discharge pipe temperature sensor error

Outdoor heat exchanger temperature sensor error

Outdoor temperature sensor error

Compressor temperature sensor error

Heat sink temperature sensor error

Pressure switch abnormal

IPM error

Compressor rotor location cannot detect

Compressor Start-up error

Outdoor unit fan motor error (upper fan)

Outdoor unit fan motor error (lower fan)

LED Flashing

Pattern

1timeflash

2 times blink

3 times blink

4 times blink

7 times blink

8 times blink

9 times blink

12 times blink

13 times blink

14 times blink

15 times blink

16 times blink

2. ERROR DISPLAY METHOD

Outdoor LED Blink (1 to 16 times) 0.5sec ON / 0.5sec OFF blinking

0.5sec 0.5sec 2sec

Display priority

2 3 4 5 6 7 8

10 11

Trouble shooting

7 12 19 13 14 17 20

OFF

3. NORMAL OPERATION DISPLAY

Operation LED Blinking Pattern Normal operation Continuously lighting Protected operation Pump down operation

5sec ON / 1sec OFF 1sec ON / 1sec OFF

02-03

2-2 TROUBLE SHOOTING WITH ERROR CODE

Trouble shooting 1

INDOOR UNIT Error Method:

Communication Error (Indoor unit Remote control)

Detective Actuators:

Indoor unit controller PCB circuit Wired Remote Control

Indicate or Display:

Indoor Unit : No LED

Outdoor Unit : No indication

ERROR CODE : E : 00

Detective details:

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.

Forecast of Cause:

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

Check Point 1 : Check the connection of terminal

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.

OKOK

Check Point 2 : Check Remote Control and Controller PCB

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

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

02-04

Trouble shooting 2

OUTDOOR UNIT Error Method:

Communication Error (Serial Reverse Transfer Error)

Indicate or Display:Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 01

Detective Actuators:

Detective details:

Outdoor Unit Main PCB Circuit Active Filter Module

Forecast of Cause:

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?

YESYES

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)

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

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 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC208 - 230V 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 1 - 3.

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

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

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

WHITE

BLACK

RED

WHITE

BLACK

02-05

Trouble shooting 3 INDOOR UNIT Error Method:

INDOOR UNIT

Room Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 02 / 03

Detective Actuators:

Indoor Unit Controller PCB Circuit Room Temperature Thermistor

Detective details:

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

Forecast of Cause :

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

Thermistor Characteristics (Approx. value)

Temperature

32°F (0°C)

104°F (40°C)

41°F (5°C)

113°F (45°C)

50°F (10°C)

122°F (50°C)

59°F (15°C)

68°F (20°C)

77°F (25°C)

10.012.515.820.225.933.6Resistance Value (k )

86°F (30°C)

8.04

95°F (35°C)

6.51

3.594.355.30Resistance Value (k )

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

Check Point 3 :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)

THERMISTOR (PIPE TEMP.)

THERMISTOR

GRAY

BLACK

(ROOM TEMP.)

12 12 12 12

CN7 CN8

If the voltage does not appear, replace Controller PCB.

02-06

Trouble shooting 4 INDOOR UNIT Error Method:

INDOOR UNIT

Indoor Heat Exchanger Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERRORCODE:E:04/05

Detective Actuators:

Indoor Unit Controller PCB Circuit Heat Exchanger Temperature Thermistor

Detective details:

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

Forecast of Cause :

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

32°F (0°C)

41°F (5°C)

50°F (10°C)

59°F (15°C)

68°F (20°C)

77°F (25°C)

49.762.980.3103134176Resistance Value (k )

86°F (30°C)

39.6

95°F (35°C)

31.7

Temperature

104°F (40°C)

113°F (45°C)

122°F (50°C)

17.120.825.6Resistance Value (k )

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)

THERMISTOR (PIPE TEMP.)

THERMISTOR

GRAY

BLACK

(ROOM TEMP.)

12 12 12 12

CN7 CN8

If the voltage does not appear, replace Controller PCB.

02-07

Trouble shooting 5 OUTDOOR UNIT Error Method: Outdoor Heat Exchanger Temperature

Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 3 times blink

ERROR CODE : E : 06

Detective Actuators:

Outdoor Unit Main PCB Circuit Heat Exchanger Temperature Thermistor

Detective details:

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

Forecast of Cause :

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

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

14°F (-10°C)

23°F (-5°C)

32°F (0°C)

41°F (5°C)

50°F (10°C)

59°F (15°C)

7.679.7312.416.120.927.5Resistance Value (k )

68°F (20°C)

6.10

77°F (25°C)

4.89

86°F (30°C)

3.95

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

OKOK

Check Point 3 :

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)

THERMISTOR

(DISCHARGE)

12 12 12 12 12

(PIPE)

BROWN

THERMISTOR

(OUTDOOR)

BLACK

THERMISTOR

(COMPRESSOR)

BLUE

THERMISTOR

(HEAT SINK)

BROWN

BLACK

CN21 CN22 CN23 CN26 CN25

If the voltage does not appear, replace Main PCB.

02-08

Trouble shooting 6

INDOOR UNIT Error Method:

Water Drain Abnormal

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 09

Detective Actuators:

Indoor Unit Controller PCB Circuit

Detective details:

When Float Switch is ON for more than 3 minutes.

Float Switch

Forecast of Cause :

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

Check Point 1 : Check Float Switch

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

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

>>If Float switch is detective, replace it.

OKOK

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

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

>>Replace Float switch if the wire is abnormal

ONON OFFOFF

OKOK

Check Point 3 : Replace Controller PCB

If Check Point 1&2donotimprovethesymptom, change Controller PCB.

02-09

Trouble shooting 7 OUTDOOR UNIT Error Method:

INDOOR UNIT

Outdoor Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 4 times blink ERROR CODE : E : 0A

Detective Actuators:

Outdoor Unit Main PCB Circuit Outdoor Temperature Thermistor

Detective details:

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

Forecast of Cause :

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

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

-4°F (-20°C)

86°F (30°C)

14°F (-10°C)

104°F (40°C)

23°F (-5°C)

122°F (50°C)

32°F (0°C)

140°F (60°C)

41°F (5°C)

158°F (70°C)

50°F (10°C)

59°F (15°C)

16.1

68°F (20°C)

12.620.726.935.246.662.3115Resistance Value (k )

5.187.97

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

3.45 2.36 1.65Resistance Value (k )

OKOK

Check Point 3 :

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)

THERMISTOR

(DISCHARGE)

12 12 12 12 12

(PIPE)

BROWN

THERMISTOR

(OUTDOOR)

BLACK

THERMISTOR

(COMPRESSOR)

BLUE

THERMISTOR

(HEAT SINK)

BROWN

BLACK

CN21 CN22 CN23 CN26 CN25

If the voltage does not appear, replace Main PCB.

02-10

Trouble shooting 8 OUTDOOR UNIT Error Method:

INDOOR UNIT

Outdoor Discharge Pipe Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 2 times blink

ERROR CODE : E : 0C

Detective Actuators:

Outdoor Unit Main PCB Circuit Discharge Pipe Temperature Thermistor

Detective details:

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

Forecast of Cause :

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

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

32°F (0°C)

41°F (5°C)

50°F (10°C)

59°F (15°C)

68°F (20°C)

86°F (30°C)

41.164.581.8105135176Resistance Value (k )

Temperature

158°F (70°C)

176°F (80°C)

194°F (90°C)

212°F (100°C)

248°F (120°C)

284°F (140°C)

104°F (40°C)

320°F (160°C)

122°F (50°C)

18.126.9

356°F (180°C)

140°F (60°C)

12.5

1.211.983.434.616.318.78Resistance Value (k )

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

0.77

0.51

OKOK

Check Point 3 :

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)

THERMISTOR

(DISCHARGE)

12 12 12 12 12

(PIPE)

BROWN

THERMISTOR

(OUTDOOR)

BLACK

THERMISTOR

(COMPRESSOR)

BLUE

THERMISTOR

(HEAT SINK)

BROWN

BLACK

CN21 CN22 CN23 CN26 CN25

If the voltage does not appear, replace Main PCB.

02-11

Trouble shooting 9

INDOOR UNIT Error Method:

Indoor EEPROM abnormal (Model No.)

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 11

Detective Actuators:

Indoor Unit Controller PCB circuit

Detective details:

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

Forecast of Cause:

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?

YESYES

Check Point 2 :

Check Indoor Unit electric components

Check all connectors. (loose connector or incorrect wiring)

Check any shortage or corrosion on PCB.

Check Point 3 : Replace Controller PCB

Change Controller PCB.

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.

02-12

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.

Trouble shooting 10

INDOOR UNIT Error Method:

Indoor Fan Motor abnormal

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 12

Detective Actuators:

Detective details:

Indoor Unit Controller PCB Circuit Indoor Fan Motor

Forecast of Cause:

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

4. Capacitor failure 5. Control 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 Point 2 : Check Motor winding

Check Indoor Fan motor. (PARTS INFORMATION 5)

>>If Fan motor is abnormal, replace it.

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

Check Point 3 : Check ambient temp. around motor

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

>>Upon the temperature coming down, restart operation.

Check Point 4 : Check Motor Capacitor

Check continuity of motor capacitor

>>If it is shorted, replace the capacitor.

Check Point 5 : Check Output Voltage of Control PCB

Check indoor unit circuit diagram and the output voltage (between 2 (White) and 3 (Red)) of CN5.

AUU18RCLX : 77% of Input AC voltage (Cooling, Airflow[HIGH])

73% of Input AC voltage (Heatling, Airflow[HIGH])

AUU24RCLX : 93% of Input AC voltage (Cooling, Airflow[HIGH])

81% of Input AC voltage (Heatling, Airflow[HIGH])

AUU36RCLX : 91% of Input AC voltage (Cooling, Airflow[HIGH])

91% of Input AC voltage (Heatling, Airflow[HIGH])

AUU42RCLX : 98% of Input AC voltage (Cooling, Airflow[HIGH])

98% of Input AC voltage (Heatling, Airflow[HIGH])

If the voltage is not correct, replace Controller PCB.

02-13

Trouble shooting 11

INDOOR UNIT Error Method:

Outdoor Communication Signal Error (Forward Transfer Signal Error)

Indicate or Display:Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 1 time blink

ERROR CODE : E : 13

Detective Actuators:

Indoor Unit Controller PCB Circuit

Forecast of Cause:

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

Check Point 1-1 : Reset the power

Does Error indication reappear?

YESYES

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

Detective details:

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

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 3 : Check the voltage of power supply

Check the voltage of power supply

>> Check if AC208 - 230V appears at Outdoor Unit Terminal L - N.

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

Check Serial Signal (Forward Transfer Signal)

>> Check if Indicated value swings between AC70V and AC130V at Outdoor Unit Terminal 2 - 3.

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

WHITE

BLACK

RED

WHITE

BLACK

02-14

Trouble shooting 12 OUTDOOR UNIT Error Method:

Compressor Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 7 times blink

ERROR CODE : E : 15

Detective Actuators:

Outdoor Unit Main PCB Circuit Compressor Temperature Thermistor

Detective details:

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

Forecast of Cause :

1. Connector connection failure 2. T hermistor 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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Rough value)

Temperature

32°F (0°C)

41°F (5°C)

50°F (10°C)

59°F (15°C)

68°F (20°C)

86°F (30°C)

41.164.581.8105135176Resistance Value (k )

Temperature

158°F (70°C)

176°F (80°C)

194°F (90°C)

212°F (100°C)

248°F (120°C)

284°F (140°C)

104°F (40°C)

320°F (160°C)

122°F (50°C)

18.126.9

356°F (180°C)

140°F (60°C)

12.5

1.211.983.434.616.318.78Resistance Value (k )

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

0.77

0.51

OKOK

Check Point 3 :

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)

THERMISTOR

(DISCHARGE)

12 12 12 12 12

(PIPE)

BROWN

THERMISTOR

(OUTDOOR)

BLACK

THERMISTOR

(COMPRESSOR)

BLUE

THERMISTOR

(HEAT SINK)

BROWN

BLACK

CN21 CN22 CN23 CN26 CN25

If the voltage does not appear, replace Main PCB.

02-15

Indicate or Display:

Trouble shooting 13 OUTDOOR UNIT Error Method:

INDOOR UNIT

Pressure Switch Error

Detective Actuators:

Outdoor Unit Main PCB Circuit Pressure Switch

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 9 times blink

ERROR CODE : E : 16

Detective details:

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

Forecast of Cause :

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

Check Point 1 : Reset Power Supply and operate

Does abnormal LED indication show again?

NONO

YESYES

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

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

HIGH PRESSURE SW

RED

CN37

If the voltage does not appear, replace Main PCB.

1 2 3

RED

BLACK

4WV

Check Point 3 : Check Pressure Switch

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.

02-16

Trouble shooting 14

OUTDOOR UNIT Error Method:

IPM error (Permanent Stop)

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 12 times blink

ERROR CODE : E : 17

Detective Actuators:

Outdoor Unit Main PCB Circuit Compressor

Detective details:

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.

Forecast of Cause :

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

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

Check Point 1 : Check connections of Outdoor Unit Electrical Components

Check if the terminal connection is loose. Check if connector is removed.

Check erroneous connection. Check if cable is open.

>>Upon correcting the removed connector or 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 ?

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

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

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

Check Point 3 : Check Compressor

Check Compressor.

(PARTS INFORMATION 2)

OKOK

Check Point 4 : Replace Main PCB

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

02-17

Trouble shooting 15

OUTDOOR UNIT Error Method:

CT error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication

ERROR CODE : E : 18

Detective Actuators:

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

Detective details:

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)

Forecast of Cause :

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

Check Point 1-1 : Reset Power Supply and operate

Does Error indication show again?

YES

Check Point 2 :

Check connections of Outdoor Unit Electrical Components

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

>>Upon correcting the removed connector or mis-wiring,

reset the power.

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.

Check Point 3 : Check Filter PCB and Main PCB

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, F ilter PCB is failure. >> Replace Filter PCB

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

02-18

Trouble shooting 16 OUTDOOR UNIT Error Method:

INDOOR UNIT

Active Filter Module (AFM) error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : No indication ERROR CODE : E : 19

Detective Actuators:

Outdoor Unit Main PCB Circuit Active Filter Module

Detective details:

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

Forecast of Cause :

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

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.

OKOK

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.

OKOK

Check Point 3 : Check Active Filter Module

Check Active Filter Module. (PARTS INFORMATION 3)

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

OKOK

Check Point 4 : Replace Main PCB

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

02-19

Trouble shooting 17

OUTDOOR UNIT Error Method:

Compressor rotor location cannot detect (Permanent Stop)

Indicate or Display:Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 13 times blink

ERROR CODE : E : 1A

Detective Actuators:

Outdoor Unit Main PCB Circuit

Detective details:

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.

Forecast of Cause :

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

Check Point 1 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

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

(Refer to PARTS INFORMATION 2)

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

OKOK

Check Point 2 : Replace Main PCB

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

02-20

Trouble shooting 18 OUTDOOR UNIT Error Method:

Outdoor Unit Fan Motor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 15 (Fan motor 1)/ 16(Fan motor 2) times blink

ERROR CODE : E : 1b

Detective Actuators:

Outdoor Unit Main PCB Circuit Outdoor Fan Motor

Detective details:

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.

Forecast of Cause:

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 Point 2 : Check ambient temp. around motor

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

>>Upon the temperature coming down, restart operation.

Check Point 3 : Check Output Voltage of Main PCB

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

AUU18/ 24/ 36RCLX AUU42RCLX

FAN MOTOR 1

CN802

RED

1 2

BLACK

WHITE

YELLOW

BLUE

Read wire DC voltage

Red - Black

White - Black

If the voltage is not correct, replace Main PCB.

㨪

150 380V

15 1.5V

CN802

CN803

RED

1 2

BLACK

WHITE

YELLOW

BLUE

RED

1 2

BLACK

WHITE

YELLOW

BLUE

FAN MOTOR 1

FAN MOTOR 2

02-21

Trouble shooting 19

OUTDOOR UNIT Error Method:

Heat Sink Temperature Sensor Error

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 8 times blink ERROR CODE : No indication

Detective Actuators:

Outdoor Unit Main PCB Circuit Heat Sink Temperature Thermistor

Detective details:

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

Forecast of Cause :

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

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.

OKOK

Check Point 2 :

Check Point 2 : Remove connector and check Thermistor resistance value

Thermistor Characteristics (Approx. value)

Temperature

32°F (0°C)

140°F (60°C)

41°F (5°C)

158°F (70°C)

50°F (10°C)

176°F (80°C)

59°F (15°C)

7.67

194°F (90°C)

68°F (20°C)

6.109.7312.416.1Resistance Value (k )

212°F (100°C)

86°F (30°C)

230°F (110°C)

104°F (40°C)

2.623.95

248°F (120°C)

122°F (50°C)

1.79

1.25 0.89Resistance Value (k )

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

0.65

0.48

0.36

0.27

0.21

OKOK

Check Point 3 :

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)

THERMISTOR

(DISCHARGE)

12 12 12 12 12

(PIPE)

BROWN

THERMISTOR

(OUTDOOR)

BLACK

THERMISTOR

(COMPRESSOR)

BLUE

THERMISTOR

(HEAT SINK)

BROWN

BLACK

CN21 CN22 CN23 CN26 CN25

If the voltage does not appear, replace Main PCB.

02-22

Trouble shooting 20 OUTDOOR UNIT Error Method: Compressor Start-up error (Permanent Stop)

Indicate or Display:

Indoor Unit : No LED Outdoor Unit : LED 14 times blink

ERROR CODE : No indication

Detective Actuators:

Outdoor Unit Main PCB Circuit

Detective details:

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.

Forecast of Cause :

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

Check Point 1 : Check connection of around the Compressor components

For Compressor Terminal, Main PCB

Check if connector is removed.

Check erroneous connection. Check if cable is open.

(Refer to PARTS INFORMATION 2)

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

OKOK

Check Point 2 : Replace Main PCB

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

02-23

2-3 TROUBLE SHOOTING WITH NO ERROR CODE

Trouble shooting 21

Indoor Unit - No Power

Forecast of Cause:

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.

OKOK

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.

OKOK

Check Point 3 : Check Electrical Components

Check Voltage of power supply.

>> Check AC208 - 230V appears at Indoor Unit Terminal 1 - 2 (Power Supply).

YESYES

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.

OKOK

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

02-24

Trouble shooting 22

Outdoor Unit - No Power

Forecast of Cause:

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.

OKOK

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.

OKOK

Check Point 3 : Check Electrical Components

Check the voltage of power supply.

>> Check if AC208 - 230V 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 (C

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.

N1) , and replace Fuse.

YESYES

Check Active Filter Module. (PARTS INFORMATION 3)

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

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

02-25

Trouble shooting 23

Forecast of Cause:

1. Setting/ Connection failure 2. External cause

No Operation (Power is ON)

3. Electrical Component defective

Check Point 1 : Check indoor and outdoor installation condition

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?

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.

OKOK

Check Point 3 : Check Electrical Components at Indoor and Outdoor

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.

02-26

Trouble shooting 24

No Cooling / No Heating

Forecast of Cause:

1. Indoor Unit error 2. Outdoor Unit error

3. Effect by Surrounding environment

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

Check Point 1 : Check Indoor Unit

Does Indoor Unit FAN run on HIGH FAN?

Is Air Filter dirty? Is Heat Exchanger clogged?

Check if Energy save function is operated.

OKOK

Check Point 2 : Check Outdoor Unit Operation

Check if Outdoor Unit is operating (If not, refer to Trouble shooting 23)

Check any objects that obstruct the air flow route.

Check clogged Heat Exchanger.

Is the Valve open?

OKOK

Check Point 3 : Check Site Condition

Is capacity of Indoor Unit fitted to Room size?

Any windows open? Or direct sunlight ?

OKOK

Check Point 4 :

Check Indoor/ Outdoor Installation Condition

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

Check any loose or removed communication line.

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

referring to Installation Manual or Data & Technical Manual.

OKOK

psi psi

Check Point 5 : Check Refrigeration Cycle

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

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

>> When recharging the refrigerant, make sure to perform

vacuuming, and recharge the specified amount.

Check EEV (PARTS INFORMATION 4)

Check Compressor (PARTS INFORMATION 1,2)

Attention

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

Pipe (In) Pipe (Out)

02-27

Trouble shooting 25

Abnormal Noise

Forecast of Cause :

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 Main Unit installed in stable condition? Is the installation of Air suction grille and front panel normal?

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

Trouble shooting 26

Forecast of Cause:

Water Leaking

Diagnosis method when water leak occurs

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

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

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

Is Compressor locked?

>> Check Compressor (PARTS INFORMATION 1,2)

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

Diagnosis method when water is spitting out.

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

OKOK

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

OKOK

Is Fan rotating?

>> Check Fan Motor (PARTS INFORMATION 5)

OKOK

Is Float Switch defective?

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

Is the filter clogged?

OKOK

psi psi

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

02-28

2-4 SERVICE PARTS INFORMATION

SERVICE PARTS INFORMATION 1

Compressor

Diagnosis method of Compressor ( If Outdoor Unit LED displays Error, refer to Trouble shooting )

Does not start up

Is there open or loose connection cable?

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

>> If there is no failure, the defect of

Compressor is considered (Locked

compressor due to clogged dirt or

less oil)

Replace Compressor

Stops soon after starting up

Is there open or loose connection cable?

Is Gas Pipe Valve open? (Low Pressure is too low)

psi psi

Check if Refrigerant is leaking. (Recharge Refrigerant)

Abnormal noise

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

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

Replace Compressor

Check if Strainer is clogged. (PARTS INFORMATION 4)

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

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

considered. (Compression part broken or valve defective.)

02-29

Replace Compressor

SERVICE PARTS INFORMATION 2

Inverter Compressor

Check Point 1 : Check Connection

Check terminal connection of Compressor (loose or incorrect wiring)

Terminal cover opened

UU(RED)(RED)

VV (WHITE)(WHITE)WW

(BLACK)(BLACK)

Check Point 2 : Check Winding Resistance

Check winding resistance of each terminal

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

Check connection of Main PCB (Loose or incorrect wiring)

MAIN PCB

RED

WHITE

W304

W305 W303

Compressor

BLACK

Resistance Value :

0.88 (For AUU18/ 24/ 36RCLX)

0.188 (For AUU42RCLX) at 68°F(20°C)

Check Point 3 : Replace Main PCB

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

02-30

SERVICE PARTS INFORMATION 3

Active Filter Module

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

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

Check the open or short-circuit

Tester(+) Tester(-)

(+)

()

L2L1

Power factor control

Check the diode

Tester(+) Tester(-)

If it is abnormal,replace ACTIVE FILTER MODULE

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

(+) ()

L1,L2

Terminal

Control Box

Terminal

()

(+)

Resistance value

360k

720k

5.4M (approx.)

360k

5.8M (approx.)

Resistance value

5.3M (approx.)

5.4M (approx.)

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

>> If the output voltage of compressor operating is less than the output voltage of compressor stopping,

Active Filter Module is detective. >> Replace Active Filter Module

02-31

SERVICE PARTS INFORMATION 4

Outdoor unit Electronic Expansion Valve ( EEV )

Check Point 1 : Check Connections

Check connection of connector (CN27) ( Loose connector or open cable )

EXPANSION VALVE COIL

Check Point 3 : Check Voltage from Main PCB.

Remove Connector and check Voltage (DC12V)

If it does not appear, replace Main PCB.

Check Point 4 : Check Noise at start up

Turn on Power and check operation noise.

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

RED

BROWN

BLUE

3 4 5 6

ORANGE YELLOW WHITE

CN27

Check Point 2 : Check Coil of EEV

Remove connector, check each winding resistance of Coil.

Read wire

Resistance value

White - Red

Yellow - Brown

Orange - Red

at 68°F(20°C)

Blue - Brown

If Resistance value is abnormal, replace EEV.

Check Point 5 : Check Opening and Closing Operation of Valve

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

CLOSE Example : Hot Gas

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

OPEN Example : Hot Gas

Pipe (In)

Hi TEMP.

Pipe (Out)

Normal TEMP.

Pipe (In)

Hi TEMP.

Pipe (Out)

Hi TEMP.

Check Point 6 : Check Strainer

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

Pipe (In) Pipe (Out)

02-32

Pipe (In) Pipe (Out)

SERVICE PARTS INFORMATION 5

Indoor Unit Fan Motor

Check Point : AUU18/ 24RCLX

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

BLUE

Thermal protector

302°F (150°C)

PURPLE

RED

BLACK

WHITE

Check Point : AUU36/ 42RCLX

Check each winding resistance of the motor

If Resistance value is abnormal, replace motor.

Thermal protector

257 275°F (125 135°C)

(AC)

Read Wire

White - Red

Red - Black

Red - Purple

Resistance value

120

55.3 8%

61.2 8%

283 8%

at 68°F(20°C)

The connector inserting numbers

1 3

2 3

Resistance value

44.5 10%

40.5 10%

(AC)

at 68°F(20°C)

02-33

CASSETTE type

INVERTER

R410A

3 . REPLACEMENT PARTS

1. REPLACEMENT PARTS (For OUTDOOR UNIT)

1-1 For AOU18/ 24/ 36RLX

1-1-1 PARTS LAYOUT DRAWING

Heat Exchanger

Fan motor

Fan

Accumulator

Active Filter Module

Thermistor (Heat sink)

Main PCB

Filter PCB

4-way valve

Solenoid

Thermistor (Compressor temp.)

Compressor

Choke coil

Thermistor (Discharge temp.)

VIEW - A

03-01

Check valve

AOU18 2-way valve (Liquid)

AOU24/ 36 3-way valve (Liquid)

3-way valve (Gas)

Thermo Holder& Thermistor (Outdoor Temp.)

Pressure SW

Coil (Expansion valve)& Expansion valve

Thermistor (Heat exchanger temp.)

03-02

1-1-2 WIRING (For AOU18/ 24/ 36RLX)

CLAMP (Compressor wire)

CLAMP (Fan motor wire)

CLAMP (Solenoid wire)

BIND (Compressor wire

& Solenoid wire)

BIND (Thermistor (Discharge temp.)) (Thermistor (Compressor temp.)) (Thermistor (Heat exchanger temp.)) (Coil (Expansion valve))

CLAMP & BIND Thermistor (Discharge temp.) wire Thermistor (Outdoor temp.) wire Thermistor (Compressor temp.) wire Thermistor (Heat exchanger temp.) wire Coil (Expansion valve) wire Pressure SW wire

ENLARGED DETAIL

Thermistor(Outdoor temp.)

CLAMP (Pressure SW wire &

Thermistor(Outdoor temp.))

BIND (Pressure SW wire &

Thermistor(Outdoor temp.))

VIEW - B

BIND (Thermistor

(Outdoor temp.))

Pressure SW

Coil (Expansion valve)

Thermistor

BIND (Thermistor

(Heat exchanger temp.))

(Heat exchanger temp.)

ENLARGED DETAIL

03-03

1-1-3 DISASSEMBLY PROCESS (For AOU18/ 24/ 36RLX)

1. SERVICE PANEL removal

Remove the 2 mounting screws. Remove the SERVICE PANEL by sliding downward.

Replaceable Component

Compressor Accumulator 4-way valve Solenoid Thermistor (Compressor temp.)

Hook (3 places)

Thermistor (Discharge temp.) Thermistor (Outdoor temp.) Thermistor (Heat exchanger temp.) Pressure SW Coil (Expansion valve)

2. TOP PANEL removal

Remove the 7 mounting screws. Remove the TOP PANEL upward.

FRONT VIEW REAR VIEW

03-04

3. INVERTER BOX removal

Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -C,-D) Remove the INVERTER BOX upward.

FRONT VIEW

Remove the connectors

VIEW - C

Remove power supply & Connection cord.

REAR VIEW

Remove the connectors

Terminal

Choke coil

VIEW - D

INVERTER BOX

03-05

Remove the 1 mounting screw. Remove the INVERTER BOX COVER upward.

INVERTER BOX COVER

Hook (2 places)

Remove the connector and cords.

CN1 (Black/Brown/Red)

Twist W6 and W7 4 times or more.

Twist W4 and W5 2 times or more.

W8 (Black)

W9 (White)

W6 (Black)

03-06

W7 (White)

W200 (Red)

VIEW - E

W4 (Black)

W5 (White)

Remove the connector and cords.

Twist 4 times or more 2 turn the Wire this way

" - " (Black)

" L2 " (Brown)

"+"(Red)

CN407

" N1 " (Blue)

VIEW - F

Thermistor (Heat sink)

" L1 " (White)

" P " (Yellow)

BIND W12 / "P" (Yellow) W13 / "N1"(Blue) CN407

DETAIL

03-07

Remove the 6 mounting screws. Remove the INVERTER BOX A upward.

INVERTER BOX A

REAR VIEW

Main PCB Remove the 1 mounting screw. Remove the Main PCB upward.

Hook (3 places)

LEFT SIDE VIEW

Filter PCB Remove the 2 mounting screws. Remove the Filter PCB upward.

Hook (2 places)

Main PCB Filter PCB

Screw Screw

03-08

1-1-4 ASSEMBLY PROCESS of INVERTER UNIT (For AOU18/ 24/ 36RLX)

1. FILTER PCB

As shown in Fig.1, assemble FILTER PCB to INVERTER BOX A. As shown in Fig.2, pull out the wires of FILTER PCB.

Hook (2 places)

Screw (2 places)

FILTER PCBINVERTER BOX A

Fig.1

2. MAIN PCB

As shown in Fig.3, temporarily fix MAIN PCB to INVERTER BOX A. After it is temporary fix of MAIN PCB, As shown in the Fig 4 - 7, pull out the wires of MAIN PCB.

Fig.4

W12(Yellow) W13(Blue)

Fig.2

Fig.5

Hook (3 places)

MAIN PCB

Screw

Fig.3

Fig.6/ 7

03-09

As shown in Fig.4, pull out the wires.

W16 (Red)

W17 (Black)

W303 (Black) W304 (White) W305 (Red)

CN407

Thermistor

(Heat sink)

Fig. 4

As shown in Fig.5, pull out the wires and fix them.

Hook (2 places)

W303 (Black) W304 (White) W305 (Red)

Fig. 5

W12 (Yellow) W13 (Blue)

W17 (Black)

W16 (Red)

03-10

As shown in Fig.6, pull out the wires.

W200 (Red)

CN1

Fig. 6

As shown in Fig.7, pull out the wires.

W200 (Red)

CN1 wire with connector

HYIC1

Fig. 7

03-11

Don't come in contact with HYIC1.

DETAIL - A

For AOU18/ 24RLX

As shown in Fig.8, connect wires.

CN34 (Yellow)

CN1 (White)

Fig. 8

As shown in Fig.9, connect wires.

Through this hole.

TM102 (White line)TM101 (Black line)

Fig. 9

03-12

For AOU36RLX

As shown in Fig.8, connect wires.

CN1 (White)CN34 (Yellow)

As shown in Fig.9, connect wires.

W21 (Orange) W22 (Orange)

Through this hole.

Fig. 8

PTC Thermistor

Fig. 9

03-13

TM102 (White line)TM101 (Black line)

As shown in Fig.10, fix the wire to INVERTER BOX A.

Thermistor (Heat sink)

Hook (3 places)

Pull out the wire through this opening

CN407

Fig. 10

As shown in the figures, set wire with connector and bind it to INVERTER BOX A.

Bind wire to INVERTER BOX A.

Through the guide

W303 (Black) W304 (White) W305 (Red)

Fig. 11

03-14

Through the hole

1-2 For AOU42RLX

1-2-1 PARTS LAYOUT DRAWING

Heat Exchanger

Fan motor

Fan

Active Filter Module

Thermistor (Heat sink)

D,Power (Bridge)

Main PCB

Filter PCB

Choke coil

4-way valve

Thermistor (Discharge temp.)

Solenoid

Accumulator

Thermistor (Compressor temp.)

Compressor

03-15

Pressure SW

Check valve

Thermo Holder& Thermistor (Outdoor Temp.)

Coil (Expansion valve)& Expansion valve

3-way valve (Liquid)

3-way valve (Gas)

Thermistor (Heat exchanger temp.)

03-16

1-2-2 WIRING (For AOU42RLX)

CLAMP (Compressor wire)

Don't use this CABLE CLIP.

CLAMP (Compressor wire)

CLAMP (Fan motor wire x2)

BIND (Thermistor (Discharge temp.)) (Thermistor (Compressor temp.)) (Thermistor (Heat exchanger temp.)) (Coil (Expansion valve))

CLAMP & BIND Thermistor (Discharge temp.) wire Thermistor (Outdoor temp.) wire Thermistor (Compressor temp.) wire Thermistor (Heat exchanger temp.) wire Coil (Expansion valve) wire Pressure SW wire

CLAMP (Solenoid wire)

ENLARGED DETAIL

03-17

Thermistor(Outdoor temp.)

Coil (Expansion valve)

CLAMP with U PIPE (Thermistor (Heat exchanger temp.)) (Coil (Expansion valve))

ENLARGED DETAIL

Thermistor

(Heat exchanger temp.)

03-18

1-2-3 DISASSEMBLY PROCESS (AOU42RLX)

1. SERVICE PANEL removal

Remove the 2 mounting screws. Remove the SERVICE PANEL by sliding downward.

Hook (3 places)

Replaceable Component

Compressor Accumulator 4-way valve Solenoid Thermistor (Compressor temp.) Thermistor (Discharge temp.) Thermistor (Outdoor temp.) Thermistor (Heat exchanger temp.) Pressure SW Coil (Expansion valve)

03-19

2. TOP PANEL removal

Remove the 7 mounting screws. Remove the TOP PANEL upward.

FRONT VIEW REAR VIEW

03-20

3. INVERTER BOX removal

Remove the 4 mounting screws. Remove the connectors and cords. (Refer to VIEW -C,-D) Remove the INVERTER BOX upward.

FRONT VIEW

Remove the connectors

VIEW - C

Remove power supply & Connection cord.

REAR VIEW

Remove the connectors

Terminal

Choke coil

VIEW - D

INVERTER BOX

03-21

Remove the 1 mounting screw. Remove the INVERTER BOX COVER upward.

INVERTER BOX COVER

Hook (2 places)

Remove the connector and cords.

Twist W6 and W7 2 times or more.

W6 (Black)

W7 (White)

VIEW - E

03-22

W200 (Red)

W1 (Black)

W2 (White)

Remove the connector and cords.

" - " (Black)

"+"(Red)

CN407

" " (White)

D,Power (Bridge)

" " (Gray)

" L2 " (Brown)

" L1 " (White)

Thermistor (Heat sink)

BIND "P" (Yellow) "N1"(Blue) CN407

" N1 " (Blue)

VIEW - F

" P " (Yellow)

03-23

Remove the 6 mounting screws. Remove the INVERTER BOX A upward.

INVERTER BOX A

REAR VIEW

Main PCB Remove the 1 mounting screw. Remove the Main PCB upward.

Hook (3 places)

LEFT SIDE VIEW

Filter PCB Remove the 2 mounting screws. Remove the Filter PCB upward.

Hook (2 places)

Main PCB Filter PCB

Screw Screw

03-24

1-2-4 ASSEMBLY PROCESS of INVERTER UNIT (For AOU42RLX)

1. FILTER PCB

As shown in Fig.1, assemble FILTER PCB to INVERTER BOX A. As shown in Fig.2, pull out the wires of FILTER PCB.

Hook (2 places)

Screw (2 places)

FILTER PCBINVERTER BOX A

Fig.1

Fig.2

2. MAIN PCB

As shown in Fig.3, temporarily fix MAIN PCB to INVERTER BOX A. After it is temporary fix of MAIN PCB, As shown in the Fig 4 - 6, pull out the wires of MAIN PCB.

Fig.4

Fig.5

W14(Yellow) W15(Blue)

Hook (3 places)

MAIN PCB

Screw

03-25

Fig.6

Fig.3

As shown in Fig.4, pull out the wires.

Thermistor

(Heat sink)

CN407

Fig. 4

As shown in Fig.5, pull out the wires and fix them.

Hook (2 places)

W107 (White)

W303 (Black) W304 (White) W305 (Red)

W108 (Violet)

CN407

Fig. 5

03-26

Thermistor

(Heat sink)

As shown in Fig.6, pull out the wires.

W200 (Red)

As shown in Fig.7, connect wires.

CN34 (Yellow) CN1 (White)

CN1 wire with connector

Fig. 6

HYIC1

Don't come in contact with HYIC1.

VIEW - A

Fig. 7

03-27

As shown in Fig.8, connect wires.

W108 (Violet)

W107 (White)

Twist 5 times or more.

Gray line

Make White line

on Black line

Through this hole.

TM102 (White line)TM101 (Black line)

Fig. 8

03-28

As shown in Fig.9, fix the wire to INVERTER BOX A.

Thermistor (Heat sink)

Hook (3 places)

Pull out the wire through this opening

CN407

Fig. 9

As shown in the figures, set wire with connector and bind it to INVERTER BOX A.

Bind wire to INVERTER BOX A.

Through the guide

W303 (Black) W304 (White) W305 (Red)

Fig. 10

03-29

Through the hole

2. REPLACEMENT PARTS (For INDOOR UNIT)

2-1 PARTS LAYOUT DRAWING

1. INTAKE GRILLE removal

Push the INTAKE GRILLE pushbuttons (2 places). Open the INTAKE GRILLE

PUSH

OPEN

PUSH

Pushbotton (2 places)

Remove the GRILLE hinge wire.

INTAKE GRILLE

Pull up while pressing the B section.

Remove the INTAKE GRILLE.

03-30

GRILLE hinge wire

Part A detail view

Part B section view

2. FILTER removal

Remove the FILTER.

FILTER

Hook (3 places)

3. CONTROL BOX COVER removal

Remove the 5 mounting screws. Remove the CONTROL BOX COVER upward.

CONTROL BOX COVER

03-31

4. Wiring and Parts layout

Thermistor(Room temp.)

CLAMP (PWB wire (For Power Supply PCB)) (Wire with connector (For Float SW)) (Wire with connector (For Remocon))

CLAMP (Wire with connector (For Float SW)) (Wire with connector (For Remocon))

Terminal-3P

CN17 (Remocon)

CN15 (Float SW)

CN8 Thermistor

(Room temp.)

CN1 (Power Supply PCB)

Capacitor,Plastic

BIND (Wire with connector (For Capacitor,Plastic)) (PWB wire (For Power Supply PCB)X2) (Wire with connector (For Float SW)) (Wire with connector (For Remocon))

Power Supply PCBController PCB

BLACK

CN6 (Drain Pump)

WHITE

RED

CN7 Thermistor

(Heat Exchanger temp.)

CN10 (Stepping motor)

CN16 (MOTOR Feed Back)

Detail View

CN5 (FAN MOTOR)

03-32

CN4 (Capacitor)

Detail View

5. PANEL FRAME removal

Pull up the corner section (A) of the PANEL FRAME as shown in figure (4 locations).

PANEL FRAME

Part A detail view

Pull up in the direction of the arrow while holding down the C section of figure (4 locations).

Part B detail view

PANEL FR A M E

PANEL BASE

03-33

5. PANEL BASE removal

Remove the 4 mounting bolts. Remove the PANEL BASE upward.

PANEL BASE

6. CONTROL UNIT removal

Remove the 3 mounting bolts and 1 mouting screw. Remove the CONTROL UNIT upward.

SCREW

BOLT (3places)

CONTROL UNIT

03-34

7. DRAIN PAN removal

Remove the DRAIN PAN ASSY.

DRAIN PAN ASSY

03-35

8. TURBO FAN removal

Remove the M8 NUT and Washer(TURBO FAN). Remove the TURBO FAN ASSY.

For AUU18/ 24RCLX

For AUU36/ 42RCLX

M8 NUT

Washer(TURBO FAN)

TURBO FAN ASSY

The M8 special NUT should be tightened with a torque of

1.96-7.84Nm.

M8 NUT

Washer(TURBO FAN)

TURBO FAN ASSY

The M8 special NUT should be tightened with a torque of

1.96-7.84Nm.

03-36

9. FAN MOTOR removal

For AUU18/ 24RCLX

Remove the 3 mounting nuts. Remove the FAN MOTOR ASSY.

Special NUT M6 (3 places)

FAN MOTOR ASSY

Rubber (Vibration-proof) -B (3 places)

For AUU36/ 42RCLX

Remove the 4 mounting nuts. Remove the FAN MOTOR ASSY.

Special NUT M6 (4 places)

Rubber (Vibration-proof) -A (3 places)

FAN MOTOR ASSY

03-37

10. DRAIN PUMP removal

Remove the 2 mounting screws. Remove the DRAIN PUMP UNIT.

DRAIN PUMP UNIT

DRAIN HOSE

03-38

1116,Suenaga,Takatsu-ku,Kawasaki 213-8502,Japan

Apr. 2006 Printed in Japan

Fujitsu AOU24RLX, AOU42RLX, AUU42RCLX, AUU24RCLX, AOU18RLX User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual