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

...

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

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