SPLIT TYPE
ROOM AIR CONDITIONER
type
CASSETTE
INVERTER
SERVICE
INSTRUCTION
Models Indoor unit Outdoor unit
AOU18RLX
AOU24RLX
AOU36RLX
AOU42RLX
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
3. REPLACEMENT PARTS
1 REPLACEMENT PARTS ( For OUTDOOR UNIT )....................................................... 03-01
03-01
03-01
1-1 For AOU18/ 24/ 36RLX...........................................................................................
1-1-1 PARTS LAYOUT DRAWING...............................................................................
1-1-2 WIRING................................................................................................................ 03-03
1-1-3 DISASSEMBLY PROCESS.................................................................................
1-1-4 ASSEMBLY PROCESS of INVERTER UNIT......................................................
03-04
03-09
03-15
03-15
1-2 For AOU42RLX.......................................................................................................
1-2-1 PARTS LAYOUT DRAWING...............................................................................
1-2-2 WIRING................................................................................................................ 03-17
1-2-3 DISASSEMBLY PROCESS.................................................................................
1-2-4 ASSEMBLY PROCESS of INVERTER UNIT......................................................
03-19
03-25
2 REPLACEMENT PARTS ( For INDOOR UNIT )........................................................... 03-30
03-30
2-1 PARTS LAYOUT DRAWING...................................................................................
CASSETTE type
INVERTER
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
20Hz
20Hz
20Hz
maximum
frequency
63Hz
80Hz
90Hz
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
25Hz
92Hz
( Fig. 1 : Limit of Maximum Frequency based on Outdoor Temperature )
Fan speed mode
Outdoor air
temperature
Hi
Me
Lo
AUU18RCLX A zone
B zone
C zone
D zone
AUU24RCLX A zone
B zone
C zone
D zone
AUU36RCLX A zone
B zone
C zone
D zone
AUU42RCLX A zone
B zone
63Hz
45Hz
35Hz
35Hz
80Hz
55Hz
45Hz
45Hz
90Hz
75Hz
70Hz
63Hz
92Hz
72Hz
60Hz
60Hz
45Hz
35Hz
35Hz
30Hz
55Hz
45Hz
45Hz
35Hz
75Hz
70Hz
63Hz
55Hz
72Hz
60Hz
60Hz
53Hz
45Hz
35Hz
35Hz
30Hz
55Hz
45Hz
45Hz
35Hz
75Hz
70Hz
63Hz
55Hz
72Hz
60Hz
60Hz
53Hz
A zone
B zone
87.8°F
(31°C)
66.2°F
(19°C)
C zone
D zone
51.8°F
(11°C)
C zone
D zone
01-01
2. HEATING OPERATION
2-1 HEATING 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 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
20Hz
20Hz
20Hz
maximum
frequency
87Hz
87Hz
95Hz
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
23Hz
92Hz
( Fig.2 : Limit of Maximum Frequency based on Outdoor Temperature )
Limit of Maximum
Outdoor air
temperature
Frequency
AUU18RCLX A zone
B zone
87Hz
85Hz
70Hz
70Hz
60Hz
87Hz
85Hz
70Hz
70Hz
60Hz
95Hz
95Hz
90Hz
80Hz
80Hz
92Hz
92Hz
90Hz
80Hz
80Hz
E zone
D zone
68°F
(20°C)
C zone
D zone
E zone
60.8°F
(16°C)
AUU24RCLX A zone
B zone
C zone
C zone
D zone
E zone
53.6°F
(12°C)
B zone
A zone
AUU36RCLX
AUU42RCLX
A zone
B zone
C zone
D zone
E zone
A zone
B zone
C zone
D zone
E zone
41°F
(5°C)
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
AUU24RCLX
AUU36RCLX
AUU42RCLX
25Hz
30Hz
45Hz
30Hz
( Fig.3 : Compressor Control based on Room Temperature )
Room Room
temperature temperature
Compressor ON
Ts+2.7 degF
(1.5 degC)
Ts+1.8 degF
(1 degC)
Compressor OFF
Ts : Setting temperature
( Fig.4 : Indoor Fan Control )
Compressor
ON
OFF
Indoor fan
air flow mode
ON
OFF
30
5
30
120
5
(sec)
180
180
Air flow mode : Lo
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.
1 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 )
Operation mode
Room temperature :TR
TR > Ts +3.6 degF
=
Cooling
(2 degC)
Ts +3.6 degF > TR > Ts-3.6 degF
Monitoring
Heating
(2 degC)
(2 degC)
Ts +3.6 degF > TR
=
(2 degC)
Ts : Setting temperature
2
3
4
1
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.
1
When the compressor was stopped for 6 consecutive minutes by the temperature control function
after the COOLING or HEATING operation mode was selected at 1 above, operation is switched
to MONITORING and the operation mode is selected again.
01-04
5. INDOOR FAN CONTROL
1. Fan speed
( Table 5 : Indoor Fan Speed )
AUU18RCLX
AUU24RCLX
Operation mode
Heating
Air flow mode
Speed (rpm)
Operation mode
Heating
Air flow mode
Speed (rpm)
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
440
380
330
250
490
430
360
250
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
400
350
310
250
450
390
330
250
Cooling
Cooling
AUU42RCLX
AUU36RCLX
Operation mode
Heating
Air flow mode
Speed (rpm)
Operation mode
Heating
Air flow mode
Speed (rpm)
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
620
550
470
300
620
550
470
300
Hi
Me
Lo
S-Lo
Hi
Me
Lo
S-Lo
580
510
440
300
580
510
440
300
Cooling
Cooling
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,
as shown in Figure 5.
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 ) )
*1
When the room
temperature rises
TR : Room temperature
Ts : Setting temperature
TR-Ts > 5.4 degF
=
(3 degC)
TR-Ts > 3.6 degF
=
HIGH mode
(2 degC)
5.4 degF > TR-Ts > 3.6 degF
=
(3 degC)
(2 degC)
3.6 degF > TR-Ts > 1.8 degF
=
MED mode
LOW mode
(2 degC)
(1 degC)
3.6 degF > TR-Ts
(2 degC)
1.8 degF > TR-Ts
(1 degC)
When the room
temperature drops
*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.
( Fig.6 : Airflow change - over ( Heating : AUTO ) )
Indoor heat exchanger
temperature
Go up one-step
116.6°F
(47°C)
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.
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
Indoor heat exchanger
temperature
SETTING
FAN MODE
91.4°F
(33°C)
86°F
(30°C)
LO mode
86°F
S-LOW mode
(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
780/ 400/ 250/ 220/ 200 rpm
780/ 400/ 250/ 220/ 200 rpm
900/ 780/ 400/ 250/ 220/ 200 rpm
900/ 850/ 780/ 400/ 250/ 220/ 200 rpm
850/ 780/ 400/ 350/ 300 rpm
780/ 750/ 350/ 0 rpm
900/ 850/ 780/ 350/ 200/ 170/ 150 rpm
850/ 780/ 750/ 350/ 200/ 170/ 150 rpm
Upper fan
Lower fan
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.
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:
(Fig.8 : Air Direction Range)
(Operation Range)
Cooling / Dry mode
Heating mode
1
2
3
Fan mode
4
Use the air direction adjustments within the ranges shown above.
The vertical airflow direction is set automatically as shown, in accordance with the type of operation
selected.
Cooling / Dry / Fan mode Horizontal flow
Heating mode
Downward flow
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)
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)
Cooling
Heating
Dry
Min
Max
Min
Max
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
20Hz
20Hz
20Hz
25Hz
63Hz
80Hz
90Hz
92Hz
20Hz
20Hz
20Hz
23Hz
87Hz
87Hz
95Hz
92Hz
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
1
Hold
Frequency
2
Time A
Time B
Time C
Time E
Time D
(Frequency)
For AUU18/ 24/ 36RCLX
1 Discharge pipe temp. > 50°F (10°C) ,86°F (30°C)
=
Frequency
Frequency
(Cooling)
(Heating)
2 Discharge pipe temp. < 50°F (10°C) ,86°F (30°C)
(Cooling) (Heating)
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
40Hz
56Hz
56Hz
70Hz
For AUU42RCLX
1 Discharge pipe temp. > 50°F (10°C) ,95°F (35°C)
=
(Cooling)
2 Discharge pipe temp. < 50°F (10°C) ,95°F (35°C)
(Cooling) (Heating)
(Heating)
(Time)
Time A
Time B
Time C
Time D
Time E
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
180sec
180sec
60sec
80sec
120sec
180sec
720sec
720sec
120sec
180sec
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
Operation mode
Operation mode
Stop mode
Stop mode
Stop mode
Set time
Set time
Set time
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.
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
Operation mode
Stop mode
Stop mode
Preceding day
Setting day
DAY OFF
Next day
Next day setting
Operation mode
Operation mode
Stop mode
Next day
Stop mode
Stop mode
Preceding day
Setting day
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))
ON
OFF
ON
OFF
SET BACK setting
80°F(26°C)
Operation
temperature
72°F(22°C)
*1
80°F(26°C)
76°F(24°C)
72°F(22°C)
Operation
temperature
*1: During the SET BACK function,
the setting temperature is changed.
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 been stopped for 3 hours, power is applied to the compressor and the compressor is heated.
(By heating the compressor, warm air is quickly discharged when operation is started.)
When operation was started, and when the outdoor temperature rises to Release temperature or greater,
preheating is over.
(Table 8 : Preheating Operation / Release Temperature)
Before 24 hour
Operation Release
temperature temperature temperature temperature
After 24 hour
Operation Release
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
37.4°F
(3°C)
44.6°F
(7°C)
32°F
(0°C)
39.2°F
(4°C)
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
Outdoor temp. -
Outdoor heat exchanger temp. exchanger temp.
Outdoor heat
Compressor integrating
operation :Less than 45min.
After 6 min. *1
Less than 6 min. *1
or 10min. *2
or 10min. *2
AUU18RCLX
AUU24RCLX
AUU36RCLX
AUU42RCLX
17.6°F(-8°C) *3
14°F (-10°C) *4
Does not operate
21.6 degF (12 degC)
- 4°F (-20°C)
*1. It means contiguous operation time.
*2. Compressor stop time: Below 20min.
Above 20min.
*3. Outdoor temp. > 30.2°F (-1°C)
=
*4. Outdoor temp. < 30.2°F (-1°C)
Select 6min.
Select 10min.
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
Outdoor heat exchanger temperature sensor value is higher than 53.6°F(12°C) or
Compressor operation time has passed 15 minutes.
AUU24RCLX
AUU36RCLX
AUU42RCLX
01-13
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)
AUU42RCLX
AUU18/ 24/ 36RCLX
Compressor integrating
Compressor integrating
operation:
operation:
45 minutes and over
45 minutes and over
Outdoor temp. > 30.2°F
Outdoor temp. < 30.2°F
Outdoor temp. > 30.2°F
=
Outdoor temp. < 30.2 F
(-1°C)
=
(-1°C)
(-1°C)
(-1°C)
Outdoor heat exchanger
temperarure:
Outdoor heat exchanger
temperarure:
Outdoor heat exchanger
temperarure:
Outdoor heat exchanger
temperarure:
Below 17.6°F (-8°C)
Below 14°F (-10°C)
Below 17.6°F (-8°C)
Below 14°F (-10°C)
Outdoor temp -
temperature:
Outdoor heat exchanger
temperarure:
Below - 4°F (-20°C)
Outdoor heat exchanger
Above 21.6 degF (12 degC)
Defrost start
Defrost start
Defrost Indicator:
Defrost Indicator:
[Operation lamp]
[Operation lamp]
9 sec ON / 1 sec OFF
9 sec ON / 1 sec OFF
Compressor : 30 Hz
3 sec later Compressor OFF
Outdoor fan motor OFF
4-way valve OFF
Compressor ON
3 sec later Outdoor fan motor OFF
28 sec later 4-way valve OFF
34 sec later compressor ON
(Frequency : 92 Hz)
(Frequency : 92 Hz)
Outdoor heat exchanger temperature: Over 53.6°F (12°C)
or
Compressor ON time: Over 15 minutes
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.
1
2 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)
1
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.
3.6 degF (2 degC)
1.8 degF
(1 degC)
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.
1.8degF 3.6degF 5.4degF 7.2degF
(1degC) (2degC) (3degC) (4degC)
Setting
temperature
ENERGY
SAVE ON
30min.
1 hour.
1 hour
30 min.
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
Outdoor unit fan speed
780 rpm
400 rpm
250 rpm
220, 200 rpm
6.0A / 5.5A
T0 > 68°F (20°C)
=
T0 < 68°F (20°C)
10.0A / 9.5A
12.0A / 11.5A
10.0A / 9.5A
8.0A / 7.5A
T0: Outdoor temperature
AUU24RCLX
Outdoor unit fan speed
900, 780 rpm
10.0A / 9.5A
12.0A / 11.5A
400 rpm
250 rpm
220, 200 rpm
6.0A / 5.5A
T0 > 68°F (20°C)
=
T0 < 68°F (20°C)
10.0A / 9.5A
8.0A / 7.5A
T0: Outdoor temperature
AUU36RCLX
Outdoor unit fan speed
400 rpm
900 rpm
780 rpm
250 rpm
220 ,200 rpm
8.0A / 7.5A
T0 > 53.6°F (12°C)
=
15.0A / 14.5A 15.0A / 14.5A 13.0A / 12.5A 10.0A / 9.5A
18.0A / 17.5A
53.6°F > T0 > 41°F
=
(12°C)
(5°C)
18.0A / 17.5A 18.0A / 17.5A 18.0A / 17.5A 18.0A / 17.5A
T0 < 41°F (5°C)
T0: Outdoor temperature
01-16
Outdoor unit fan speed
AUU42RCLX
Upper fan
Lower fan
900 ,850 ,780 ,350 rpm
850 ,780 ,750 ,350 rpm
20.0A / 19.5A
200 rpm
200 rpm
170 rpm
170 rpm
150 rpm
150 rpm
T0 > 53.6°F (12°C)
=
T0 < 53.6°F (12°C)
15.0A / 14.5A 12.0A / 11.5A 12.0A / 11.5A
20.0A / 19.5A 20.0A / 19.5A 20.0A / 19.5A
20.0A / 19.5A
T0: Outdoor temperature
[ Cooling ]
AUU18RCLX
Outdoor unit fan speed
400 rpm 250 rpm
8.0A / 7.5A 5.0A / 4.5A
780 rpm
220, 200 rpm
4.0A / 3.5A
T0 > 113°F (45°C)
=
8.0A / 7.5A
113°F > T0 > 77°F
=
10.0A / 9.5A
(45°C)
(25°C)
77°F > T0 > 66.2°F
=
12.0A / 11.5A 12.0A / 11.5A
7.0A / 6.5A
8.0A / 7.5A
(25°C)
(19°C)
66.2°F > T0 > 55.4°F
=
(19°C)
(13°C)
55.4°F > T0 > 44.6°F
=
8.5A / 8.0A
9.0A / 8.5A
5.0A / 4.5A
(13°C)
(7°C)
44.6°F > T0 > 32°F
=
6.5A / 6.0A
7.5A / 7.0A
(7°C)
(0°C)
T0 < 32°F (0°C)
T0: Outdoor temperature
AUU24RCLX
Outdoor unit fan speed
900 ,850 rpm
8.0A / 7.5A
780 rpm
400 rpm
250 rpm
220, 200 rpm
4.0A / 3.5A
T0 > 113°F (45°C)
=
8.0A / 7.5A
8.0A / 7.5A
5.0A / 4.5A
113°F > T0 > 100.4°F
=
10.0A / 9.5A 10.0A / 9.5A
12.0A / 11.5A
(45°C)
(38°C)
100.4°F > T0 > 77°F
=
(38°C)
(25°C)
77°F > T0 > 66.2°F
=
12.0A / 11.5A 12.0A / 11.5A 7.0A / 6.5A
8.0A / 7.5A
(25°C)
(19°C)
66.2°F > T0 > 55.4°F
=
(19°C)
(13°C)
55.4°F > T0 > 44.6°F
=
8.5A / 8.0A
9.0A / 8.5A
5.0A / 4.5A
6.5A / 6.0A
(13°C)
(7°C)
44.6°F > T0 > 32°F
=
(7°C)
(0°C)
7.5A / 7.0A
T0 < 32°F (0°C)
T0: Outdoor temperature
01-17
AUU36RCLX
Outdoor unit fan speed
780 rpm 400 rpm
900 ,850 rpm
250 rpm
220, 200 rpm
5.5A / 5.0A
T0 > 113°F (45°C)
=
10.0A / 9.5A 10.0A / 9.5A 10.0A / 9.5A
14.0A / 13.5A 14.0A / 13.5A
7.0A / 6.5A
113°F > T0 > 100.4°F
=
(45°C)
(38°C)
100.4°F > T0 > 66.2°F
=
18.0A / 17.5A
(38°C)
(19°C)
66.2°F > T0 > 55.4°F
=
15.0A / 14.5A 15.0A / 14.5A
7.0A / 6.5A
9.5A / 9.0A
(19°C)
(13°C)
55.4°F > T0 > 44.6°F
=
12.0A / 11.5A
(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
AUU42RCLX
Upper fan
850 rpm
750 rpm
780 rpm
780 rpm
350 rpm
350 rpm
400 rpm
0 rpm
350, 300 rpm
0 rpm
Lower fan
T0 > 113°F (45°C)
=
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
113°F > T0 > 87.8°F
=
(45°C)
(31°C)
87.8°F > T0 > 77°F
=
18.0A / 17.5A
18.0A / 17.5A
(31°C)
(25°C)
77°F > T0 > 66.2°F
=
(25°C)
(19°C)
66.2°F > T0 > 55.4°F
=
15.0A / 14.5A
18.0A / 17.5A
20.0A / 19.5A
(19°C)
(13°C)
T0 < 55.4°F (13°C)
T0: Outdoor temperature
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
decreased 10Hz every 120seconds.
37.4°F
(3°C)
Hold
42.8°F
(6°C)
Compressor OFF : Hold
Compressor ON : Release of protection
53.6°F
(12°C)
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)
The compressor frequency is
decreased 10Hz every 60seconds.
129.2°F
(54°C)
Hold
122°F
(50°C)
Compressor OFF :
Release of protection
Compressor ON :
The compressor frequency is
increased 10Hz every 60seconds.
01-19
CASSETTE type
INVERTER
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
Error code
SU MO TU WE TH FR SA
SU MO TU WE TH FR SA
Ex. Self-diagnosis
DAY
D
CLOCK ADJUST
SET BACK
CLOCK ADJUST
SET BACK
DAY OFF
D
ENERGY
SAVE
ENERGY
SAVE
THERMO
SENSOR
DELETE
SET
DELETE
1. Stop the air conditioner operation.
2. Press the SET TEMPERATURE buttons
to start the self-diagnosis.
and
and
simultaneously for 5 seconds or more
simultaneously for 5 seconds or more
3. Press the SET TEMPERATURE buttons
or there is no key input for 20 seconds to stop the self-diagnosis.
Trouble
shooting
Error contents
Error code
1
2
Communication error (indoor unit
remote control)
Communication error (Serial reverse transfer error)
Room temperature sensor open
3
Room temperature sensor short-circuited
Indoor heat exchanger temperature sensor open
Indoor heat exchanger temperature sensor short-circuited
4
5
6
Outdoor heat exchanger temperature sensor error
Water drain abnormal
7
Outdoor temperature sensor error
Outdoor discharge pipe temperature sensor error
Indoor EEPROM abnormal (Model No.)
Indoor fan motor abnormal
8
9
10
11
12
13
14
15
16
17
18
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
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.
SU MO TU WE TH FR SA
D
3. Press the START/STOP button.
Error code
Error history number
SU MO TU WE TH FR SA
DAY
4. Press the SET TEMPERATURE button to select the error history number.
0
F
1
2
d
ı
3
c
4
b
5
6
9
7
8
DAY
E
A
Lower Raise
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
Display Trouble
LED Flashing
Pattern
priority
shooting
Outdoor communication signal error
(Forward transfer signal error)
11
1 time flash
1
8
5
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
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
3
4
5
6
7
8
7
12
19
13
14
17
20
IPM error
Compressor rotor location cannot detect
Compressor Start-up error
9
10
11
Outdoor unit fan motor error (upper fan)
Outdoor unit fan motor error (lower fan)
18
12
2. ERROR DISPLAY METHOD
Outdoor LED Blink (1 to 16 times) 0.5sec ON / 0.5sec OFF blinking
0.5sec 0.5sec 2sec
ON
OFF
3. NORMAL OPERATION DISPLAY
Operation
Normal operation
LED Blinking Pattern
Continuously lighting
5sec ON / 1sec OFF
1sec ON / 1sec OFF
Protected operation
Pump down operation
02-03
2-2 TROUBLE SHOOTING WITH ERROR CODE
Trouble shooting 1
INDOOR UNIT Error Method:
Indicate or Display:
Indoor Unit : No LED
Communication Error
Outdoor Unit : No indication
ERROR CODE : E : 00
(Indoor unit
Remote control)
Detective details:
Detective Actuators:
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.
Indoor unit controller PCB circuit
Wired Remote Control
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.
OK
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
InnddiiccaatteeoorrDDisipslpalya:y:
Indoor Unit : No LED
Trouble shooting 2
OUTDOOR UNIT Error Method:
Outdoor Unit : No indication
ERROR CODE : E : 01
Communication Error
(Serial Reverse Transfer Error)
Detective details:
Detective Actuators:
When the indoor unit cannot receive the serial signal from Outdoor unit
more than 10seconds.
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
NO
Does Error indication show again?
YES
Check Point 1-2:
Check Point 2 : Check Connection
Check external cause such as noise
Check any loose or removed connection line of
Check the complete insulation of the grounding.
Indoor unit and Outdoor unit.
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).
>> 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)
OK
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.
OK
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
N
BLACK
L
RED
+
-
3
2
1
WHITE
BLACK
02-05
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : No indication
Trouble shooting 3
INDOOR UNIT Error Method:
INDOOR UNIT
Room Temperature Sensor Error
ERROR CODE : E : 02 / 03
Detective details:
Detective Actuators:
When Room Temperature Thermistor open or short-circuit is
detected at power ON.
Indoor Unit Controller PCB Circuit
Room Temperature Thermistor
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.
OK
Chheecckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
32°F
41°F
50°F
59°F
68°F
77°F
86°F
95°F
(0°C)
(5°C) (10°C) (15°C) (20°C) (25°C) (30°C) (35°C)
Resistance Value (k
Temperature
)
33.6
25.9 20.2 15.8 12.5 10.0 8.04 6.51
104°F 113°F 122°F
(40°C) (45°C) (50°C)
Resistance Value (k
)
5.30
4.35
3.59
If Thermistor is either open or shorted, replace it and reset the power.
OK
Chheecckk PPooiinntt 33 :: 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
(ROOM TEMP.)
1 2 1 2
1 2 1 2
CN7 CN8
If the voltage does not appear, replace Controller PCB.
02-06
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : No indication
Trouble shooting 4
INDOOR UNIT Error Method:
INDOOR UNIT
Indoor Heat Exchanger Temperature
Sensor Error
ERROR CODE : E : 04 / 05
Detective Actuators:
Detective details:
When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON.
Indoor Unit Controller PCB Circuit
Heat Exchanger Temperature Thermistor
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.
OK
Chheecckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
32°F
41°F
50°F
59°F
68°F
77°F
86°F
95°F
(0°C)
(5°C) (10°C) (15°C) (20°C) (25°C) (30°C) (35°C)
Resistance Value (k
Temperature
)
176
134 103 80.3 62.9 49.7 39.6 31.7
104°F 113°F 122°F
(40°C) (45°C) (50°C)
Resistance Value (k
)
25.6
20.8
17.1
If Thermistor is either open or shorted, replace it and reset the power.
OK
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
(ROOM TEMP.)
1 2 1 2
1 2 1 2
CN7 CN8
If the voltage does not appear, replace Controller PCB.
02-07
Indicate or Display:
Indoor Unit : No LED
Trouble shooting 5
OUTDOOR UNIT Error Method:
Outdoor Unit : LED 3 times blink
Outdoor Heat Exchanger Temperature
Sensor Error
ERROR CODE : E : 06
Detective Actuators:
Detective details:
Outdoor Unit Main PCB Circuit
Heat Exchanger Temperature Thermistor
When Heat Exchanger Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
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.
OK
CChheeckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
14°F 23°F 32°F 41°F 50°F 59°F 68°F 77°F 86°F
(-10°C) (-5°C) (0°C) (5°C) (10°C) (15°C) (20°C) (25°C) (30°C)
3.95
Resistance Value (k
)
27.5 20.9 16.1 12.4
9.73 7.67 6.10
4.89
If Thermistor is either open or shorted, replace it and reset the power.
OK
Check Point 3 :
Check Point 3 : Check voltage of Main PCB (DC5.0V)
DC
Make sure circuit diagram of outdoor unit and check terminal voltage at Thermistor (DC5.0V)
1 2
1 2
1 2
1 2
1 2
CN21
CN22 CN23
CN26
CN25
If the voltage does not appear, replace Main PCB.
02-08
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : No indication
Trouble shooting 6
INDOOR UNIT Error Method:
Water Drain Abnormal
ERROR CODE : E : 09
Detective Actuators:
Detective details:
Indoor Unit Controller PCB Circuit
Float Switch
When Float Switch is ON for more than 3 minutes.
Forecast of Cause :
1. Float Switch failure 2. Shorted connector/ wire 3. Controller PCB failure
Check Point 1 : Check Float Switch
Check operation of float switch. (any blocking by dust, etc.)
ON
OFF
Remove Float switch and check ON/OFF switching operation
by using a meter.
>>If Float switch is detective, replace it.
OK
Chheecckk PPooiinntt 22 :: Check Connector (CN15) / Wire
Check loose contact of CN15 /shorted wire (pinched wire).
>>Replace Float switch if the wire is abnormal
OK
Check Point 3 : Replace Controller PCB
If Check Point 1 & 2 do not improve the symptom, change Controller PCB.
02-09
Indicate or Display:
Indoor Unit : No LED
Trouble shooting 7
OUTDOOR UNIT Error Method:
INDOOR UNIT
Outdoor Unit : LED 4 times blink
ERROR CODE : E : 0A
Outdoor Temperature Sensor Error
Detective Actuators:
Detective details:
When Outdoor Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
Outdoor Unit Main PCB Circuit
Outdoor Temperature Thermistor
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.
OK
CChheeckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
- 4°F
14°F
23°F
32°F
41°F
50°F
59°F
68°F
(-20°C) (-10°C) (-5°C)
(0°C)
(5°C) (10°C) (15°C) (20°C)
Resistance Value (k
Temperature
)
115
62.3
46.6
35.2
26.9 20.7 16.1 12.6
86°F
(30°C)
104°F 122°F 140°F 158°F
(40°C) (50°C) (60°C) (70°C)
Resistance Value (k
)
7.97
5.18
3.45
2.36
1.65
If Thermistor is either open or shorted, replace it and reset the power.
OK
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)
1 2
1 2
1 2
1 2
1 2
CN21
CN22 CN23
CN26
CN25
If the voltage does not appear, replace Main PCB.
02-10
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : LED 2 times blink
Trouble shooting 8
OUTDOOR UNIT Error Method:
INDOOR UNIT
Outdoor Discharge Pipe Temperature
Sensor Error
ERROR CODE : E : 0C
Detective details:
Detective Actuators:
When Discharge Pipe Temperature Thermistor open or short-circuit
is detected at power ON or while running the compressor.
Outdoor Unit Main PCB Circuit
Discharge Pipe Temperature Thermistor
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.
OK
CChheeckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
32°F 41°F 50°F 59°F 68°F 86°F 104°F 122°F 140°F
(0°C) (5°C) (10°C) (15°C) (20°C) (30°C) (40°C) (50°C) (60°C)
12.5
Resistance Value (k
Temperature
)
176
135
105
81.8
64.5 41.1 26.9 18.1
158°F 176°F 194°F 212°F 248°F 284°F 320°F 356°F
(70°C) (80°C) (90°C) (100°C) (120°C) (140°C) (160°C) (180°C)
Resistance Value (k
)
8.78 6.31 4.61 3.43 1.98
1.21 0.77 0.51
If Thermistor is either open or shorted, replace it and reset the power.
OK
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)
1 2
1 2
1 2
1 2
1 2
CN21
CN22 CN23
CN26
CN25
If the voltage does not appear, replace Main PCB.
02-11
Indicate or Display:
Indicate or Display:
Trouble shooting 9
INDOOR UNIT Error Method:
Indoor Unit
: No LED
Outdoor Unit : No indication
ERROR CODE : E : 11
Indoor EEPROM abnormal
(Model No.)
Detective details:
Detective Actuators:
When the model information being read from EEPROM has
an apparent error.
Indoor Unit Controller PCB circuit
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
NO
Does Error indication show again?
YES
Check Point 1-2 :
Check external cause at Indoor and Outdoor
Check Point 2 :
Check Indoor Unit electric components
(Voltage drop or Noise)
Check all connectors.
(loose connector or incorrect wiring)
Instant drop : Check if there is a large load electric apparatus
in the same circuit.
Check any shortage or corrosion on PCB.
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 : Replace Controller PCB
Change Controller PCB.
Note : EEPROM
EEPROM(Electronically Erasable and
Programmable Read Only Memory) is a non-
volatile memory which keeps memorized
information even if power is turned off. It can
change the contents electronically.
To change the contents, it uses higher
voltage than normal, and it can not change a
partial contents. (Rewriting shall be done
upon erasing the all contents.)
There is a limit in a number of rewriting.
02-12
Indicate or Display:
Indoor Unit : No LED
Trouble shooting 10
INDOOR UNIT Error Method:
Outdoor Unit : No indication
ERROR CODE : E : 12
Indoor Fan Motor abnormal
Detective Actuators:
Detective details:
Indoor Unit Controller PCB Circuit
Indoor Fan Motor
When the condition that actual frequency of Indoor Fan is
below 1/3 of target frequency is continued more than 56 seconds.
Forecast of Cause:
1. Fan rotation failure 2. Fan motor winding open 3. Motor protection by surrounding temperature rise
4. 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.
OK
Check Point 2 : Check Motor winding
Check Indoor Fan motor. (PARTS INFORMATION 5)
>>If Fan motor is abnormal, replace it.
OK
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.
OK
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
InnddiiccaatteeoorrDDisipslpalya:y:
Trouble shooting 11
INDOOR UNIT Error Method:
Indoor Unit
: No LED
Outdoor Communication Signal Error
(Forward Transfer Signal Error)
Outdoor Unit : LED 1 time blink
ERROR CODE : E : 13
Detective details:
Detective Actuators:
Indoor Unit Controller PCB Circuit
When the outdoor unit cannot receive the serial signal from Indoor unit
more than 10seconds.
Forecast of Cause:
1. Connection failure 2. External cause 3. Controller PCB failure
Check Point 1-1 : Reset the power
NO
Does Error indication reappear?
YES
Check Point 1-2:
Check Point 2 : Check Connection
Check external cause such as noise
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 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 connection between Indoor Unit Controller PCB
and Filter PCB.
(If there is loose connector or open cable)
OK
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.
OK
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
N
BLACK
L
+
-
RED
3
2
1
WHITE
BLACK
02-14
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : LED 7 times blink
Trouble shooting 12
OUTDOOR UNIT Error Method:
Compressor Temperature Sensor Error
ERROR CODE : E : 15
Detective Actuators:
Detective details:
When Compressor Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
Outdoor Unit Main PCB Circuit
Compressor Temperature Thermistor
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.
OK
CChheeckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Rough value)
Temperature
32°F 41°F 50°F 59°F 68°F 86°F 104°F 122°F 140°F
(0°C) (5°C) (10°C) (15°C) (20°C) (30°C) (40°C) (50°C) (60°C)
12.5
Resistance Value (k
Temperature
)
176
135
105
81.8
64.5 41.1 26.9 18.1
158°F 176°F 194°F 212°F 248°F 284°F 320°F 356°F
(70°C) (80°C) (90°C) (100°C) (120°C) (140°C) (160°C) (180°C)
Resistance Value (k
)
8.78 6.31 4.61 3.43 1.98
1.21 0.77 0.51
If Thermistor is either open or shorted, replace it and reset the power.
OK
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)
1 2
1 2
1 2
1 2
1 2
CN21
CN22 CN23
CN26
CN25
If the voltage does not appear, replace Main PCB.
02-15
Indicate or Display:
Indicate or Display:
Trouble shooting 13
OUTDOOR UNIT Error Method:
INDOOR UNIT
Indoor Unit
: No LED
Outdoor Unit : LED 9 times blink
Pressure Switch Error
ERROR CODE : E : 16
Detective details:
Detective Actuators:
When pressure switch open is detected in 10 seconds
after the power is turned on.
Outdoor Unit Main PCB Circuit
Pressure Switch
Forecast of Cause :
1. Connector connection failure 2. Pressure Switch failure 3. Main PCB failure
Check Point 1 : Reset Power Supply and operate
NO
Does abnormal LED indication show again?
YES
Chheecckk PPooiinntt 32 :: 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
1
RED
CN37
2
BLACK
BLACK
1
2
3
4WV
If the voltage does not appear, replace Main PCB.
OK
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
Indicate or Display:
Trouble shooting 14
Indoor Unit
: No LED
OUTDOOR UNIT Error Method:
Outdoor Unit : LED 12 times blink
ERROR CODE : E : 17
IPM error (Permanent Stop)
Detective details:
Detective Actuators:
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.
Outdoor Unit Main PCB Circuit
Compressor
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.
OK
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.
OK
Check Point 3 : Check Compressor
Check Compressor. (PARTS INFORMATION 2)
OK
Check Point 4 : Replace Main PCB
If Check Point 1, 2, 3 do not improve the symptom, change Main PCB.
02-17
Indicate or Display:
Trouble shooting 15
Indoor Unit
: No LED
OUTDOOR UNIT Error Method:
Outdoor Unit : No indication
ERROR CODE : E : 18
CT error
Detective details:
Detective Actuators:
Outdoor Unit Main PCB Circuit
Outdoor Unit Filter PCB Circuit
(Input current sensor unit)
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
NO
Does Error indication show again?
YES
Check Point 2 :
Check Point 1-2 :
Check connections of Outdoor Unit Electrical Components
Check external cause at Indoor and Outdoor
(Voltage drop or Noise)
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.
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.
OK
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, Filter PCB is failure.
>> Replace Filter PCB
If it does not improve the symptom, change Main PCB.
02-18
Indicate or Display:
Indoor Unit : No LED
Outdoor Unit : No indication
ERROR CODE : E : 19
Trouble shooting 16
OUTDOOR UNIT Error Method:
INDOOR UNIT
Active Filter Module (AFM) error
Detective details:
Detective Actuators:
Outdoor Unit Main PCB Circuit
Active Filter Module
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.
OK
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.
OK
Check Point 3 : Check Active Filter Module
Check Active Filter Module. (PARTS INFORMATION 3)
>>If Active Filter Module is abnormal, replace it.
OK
Check Point 4 : Replace Main PCB
If Check Point 1, 2 do not improve the symptom, change Main PCB.
02-19
InnddiiccaatteeoorrDDisipslpalya:y:
Trouble shooting 17
Indoor Unit
: No LED
OUTDOOR UNIT Error Method:
Outdoor Unit : LED 13 times blink
ERROR CODE : E : 1A
Compressor rotor location cannot detect
(Permanent Stop)
Detective details:
Detective Actuators:
While running the compressor, if the detected rotor location is out of
phase with actual rotor location more than 90 degrees,
the compressor stops.
Outdoor Unit Main PCB Circuit
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.
OK
Check Point 2 : Replace Main PCB
If Check Point 1 do not improve the symptom, change Main PCB.
02-20
Indicate or Display:
Indoor Unit : No LED
Trouble shooting 18
OUTDOOR UNIT Error Method:
Outdoor Unit : LED 15 (Fan motor 1)/ 16(Fan motor 2) times blink
ERROR CODE : E : 1b
Outdoor Unit Fan Motor Error
Detective Actuators:
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.
Outdoor Unit Main PCB Circuit
Outdoor Fan Motor
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.
OK
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.
OK
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
FM
FAN MOTOR 1
FM
RED
RED
1
1
2
3
4
5
6
2
BLACK
WHITE
YELLOW
BLUE
BLACK
WHITE
YELLOW
BLUE
CN802
CN803
CN802
3
4
5
6
FAN MOTOR 2
FM
RED
1
2
3
4
5
6
Read wire
DC voltage
BLACK
WHITE
YELLOW
BLUE
Red - Black
White - Black
150㨪380V
15 1.5V
If the voltage is not correct, replace Main PCB.
02-21
Indicate or Display:
Indoor Unit : No LED
Trouble shooting 19
OUTDOOR UNIT Error Method:
Outdoor Unit : LED 8 times blink
ERROR CODE : No indication
Heat Sink Temperature Sensor Error
Detective details:
Detective Actuators:
When Heat Sink Temperature Thermistor open or short-circuit is
detected at power ON or while running the compressor.
Outdoor Unit Main PCB Circuit
Heat Sink Temperature Thermistor
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.
OK
CChheeckk PPooiinntt 22 :: Remove connector and check Thermistor resistance value
Thermistor Characteristics (Approx. value)
Temperature
32°F
(0°C)
41°F
50°F
59°F
68°F
86°F
104°F 122°F
(40°C) (50°C)
(5°C) (10°C) (15°C) (20°C) (30°C)
Resistance Value (k
Temperature
)
16.1
12.4 9.73 7.67 6.10
3.95
2.62
1.79
140°F 158°F 176°F 194°F 212°F 230°F 248°F
(60°C) (70°C) (80°C) (90°C) (100°C) (110°C) (120°C)
Resistance Value (k
)
1.25
0.89
0.65
0.48
0.36
0.27
0.21
If Thermistor is either open or shorted, replace it and reset the power.
OK
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)
1 2
1 2
1 2
1 2
1 2
CN21
CN22 CN23
CN26
CN25
If the voltage does not appear, replace Main PCB.
02-22
Indicate or Display:
Trouble shooting 20
Indoor Unit
: No LED
OUTDOOR UNIT Error Method:
Compressor Start-up error
(Permanent Stop)
Outdoor Unit : LED 14 times blink
ERROR CODE : No indication
Detective Actuators:
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.
Outdoor Unit Main PCB Circuit
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.
OK
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
Forecast of Cause:
Trouble shooting 21
1. Power Supply failure 2. External cause
3. Electrical Components defective
Indoor Unit - No Power
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.
OK
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.
OK
Check Point 3 : Check Electrical Components
NO
Check Voltage of power supply.
>> Check AC208 - 230V appears at Indoor Unit Terminal 1 - 2 (Power Supply).
YES
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.
OK
If the symptom does not change by above Check3, replace Filter PCB.
02-24
Forecast of Cause:
Trouble shooting 22
1. Power Supply failure 2. External cause
3. Electrical Components defective
Outdoor Unit - No Power
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.
OK
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.
OK
Check Point 3 : Check Electrical Components
NO
Check the voltage of power supply.
>> Check if AC208 - 230V appears at Outdoor Unit Terminal L - N.
YES
Check Fuse (F2, F4) in Main PCB.
>> If Fuse is open, check loose terminal or removed connector (CN1) , and replace Fuse.
Check Varistor in Main PCB (VA103).
>> If Varistor is defective, there is a possibility of an abnormal power supply.
Check the correct power supply and replace Varistor.
Upon checking the normal power supply, replace Varistor.
YES
Check Active Filter Module. (PARTS INFORMATION 3)
>>If Active Filter Module is abnormal, replace it.
OK
If the symptom does not change by above Check 3, replace Main PCB.
02-25
Forecast of Cause:
Trouble shooting 23
1. Setting/ Connection failure 2. External cause
3. Electrical Component defective
No Operation (Power is ON)
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.
OK
Turn off Power and check/ correct followings.
Is there loose or removed communication line of Indoor Unit and Outdoor Unit?
OK
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.
OK
Check Point 3 : Check Electrical Components at Indoor and Outdoor
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
>> If the symptom does not change by above Check 1, 2, 3, replace Main PCB of Outdoor unit.
02-26
Forecast of Cause:
Trouble shooting 24
1. Indoor Unit error 2. Outdoor Unit error
3. Effect by Surrounding environment
No Cooling / No Heating
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.
OK
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?
OK
Attention
Check Point 3 : Check Site Condition
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.
Is capacity of Indoor Unit fitted to Room size?
Any windows open? Or direct sunlight ?
OK
Pipe (In)
Pipe (Out)
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.
psi psi
OK
Pipe (In)
Pipe (Out)
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)
02-27
Forecast of Cause :
Trouble shooting 25
1. Abnormal installation (Indoor/ Outdoor) 2. Fan failure(Indoor/ Outdoor)
3. Compressor failure (Outdoor)
Abnormal Noise
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 Fan Guard installed normally?
Is Main Unit installed in stable condition?
Is the installation of Air suction grille and
front panel normal?
OK
OK
Is Fan broken or deformed?
Is the screw of Fan loose?
Is there any object which obstruct the Fan rotation?
Is Fan broken or deformed?
Is the screw of Fan loose?
OK
Is there any object which obstruct the Fan rotation?
Check if vibration noise by loose bolt or contact noise
of piping is happening.
OK
Is Compressor locked?
>> Check Compressor (PARTS INFORMATION 1,2)
Forecast of Cause:
Trouble shooting 26
1. Erroneous installation 2. Drain hose failure 3. Float Switch failure
Water Leaking
Diagnosis method when water is spitting out.
Is the filter clogged?
Diagnosis method when water leak occurs
Is Main Unit installed in stable condition?
Is Main Unit broken or deformed at the time of
transportation or maintenance?
OK
OK
psi psi
Check Gas Pressure and correct it
if there was a gas leak.
Is Drain Hose connection loose?
Is there a trap in Drain Hose?
Is Drain Hose clogged?
OK
Is Fan rotating?
>> Check Fan Motor (PARTS INFORMATION 5)
OK
Is Float Switch defective?
>> Check Float Switch (Refer to Trouble Shooting 6)
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 )
Abnormal noise
Stops soon after starting up
Does not start up
Check if vibration noise by
loose bolt or contact noise
of piping is happening.
Is there open or loose connection
cable?
Is there open or loose connection
cable?
Is Gas Pipe Valve open?
(Low Pressure is too low)
Check Filter PCB, Main PCB,
connection of Compressor,and winding
resistance. (Refer to the next page).
Defective Compressor
can be considered.
(due to inside dirt clogging
or broken component)
>> If there is no failure, the defect of
Compressor is considered (Locked
compressor due to clogged dirt or
less oil)
psi psi
Check if Refrigerant is leaking.
(Recharge Refrigerant)
Replace Compressor
Check if Strainer is clogged.
(PARTS INFORMATION 4)
Replace Compressor
Check Filter PCB, Main PCB,
connection of Compressor,and winding
resistance. (Refer to the next page).
>> If there is no failure, the defect of Compressor can be
considered. (Compression part broken or valve defective.)
Replace Compressor
02-29
SERVICE PARTS INFORMATION 2
Inverter Compressor
Check Point 1 : Check Connection
Check terminal connection of Compressor
(loose or incorrect wiring)
Check connection of Main PCB
(Loose or incorrect wiring)
Terminal cover opened
U(RED)
W304
MAIN PCB
W305
W303
W
V (WHITE)
(BLACK)
RED
WHITE
BLACK
Compressor
Check Point 2 : Check Winding Resistance
Check winding resistance of each terminal
If the resistance value is 0 or infinite, replace Compressor.
U
Resistance Value :
0.88
0.188 (For AUU42RCLX)
at 68°F(20°C)
(For AUU18/ 24/ 36RCLX)
V
W
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
Terminal
L1
L2
(+)
( )
P
Resistance value
D1
Tester(+) Tester(-)
(+)
( )
P
( )
N1
(+)
L2
360k
0
N1
N2
Io
720k
L1
5.4M (approx.)
Power factor control
360k
P
N1
Control Box
N2
L1,L2
L2
5.8M (approx.)
Check the diode
Terminal
Resistance value
Tester(+) Tester(-)
5.3M (approx.)
L2
P
P
5.4M (approx.)
L2
If it is abnormal,replace ACTIVE FILTER MODULE
Check Point 2 : Check the Output DC voltage (between P and N1)
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
RED
BROWN
BLUE
1
2
3
4
5
6
ORANGE
YELLOW
WHITE
EV
CN27
Check Point 3 : Check Voltage from Main PCB.
Check Point 2 : Check Coil of EEV
DC
Remove connector, check each winding
resistance of Coil.
Remove Connector and check Voltage (DC12V)
If it does not appear, replace Main PCB.
Read wire
White - Red
Resistance value
Check Point 4 : Check Noise at start up
Turn on Power and check operation noise.
Yellow - Brown
Orange - Red
Blue - Brown
46
4
at 68°F(20°C)
If an abnormal noise does not show, replace Main PCB.
If Resistance value is abnormal, replace EEV.
Check Point 5 : Check Opening and Closing Operation of Valve
If it is open,
When Valve is closed,
it has no temp. difference between Inlet and Outlet.
it has a temp. difference between Inlet and Outlet.
CLOSE
Example : Hot Gas
OPEN
Example : Hot Gas
Pipe (In)
Pipe (In)
Hi TEMP.
Hi TEMP.
Pipe (Out)
Hi TEMP.
Pipe (Out)
Normal 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)
Pipe (In)
Pipe (Out)
02-32
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
Read Wire
White - Red
Red - Black
Red - Purple
Red - Purple
Resistance value
PURPLE
120
55.3
61.2
8%
8%
8%
Thermal protector
302°F (150°C)
RED
Pr
(AC)
BLACK
WHITE
283
8%
at 68°F(20°C)
Check Point : AUU36/ 42RCLX
Check each winding resistance of the motor
If Resistance value is abnormal, replace motor.
3
Pr
The connector
Resistance value
Thermal protector
257 275°F
inserting numbers
(125 135°C)
1
2
3
3
44.5
40.5
10%
10%
2
1
at 68°F(20°C)
(AC)
02-33
CASSETTE type
INVERTER
3 . REPLACEMENT PARTS
1. REPLACEMENT PARTS (For OUTDOOR UNIT)
1-1 For AOU18/ 24/ 36RLX
1-1-1 PARTS LAYOUT DRAWING
Active Filter Module
Heat Exchanger
Fan motor
Thermistor (Heat sink)
Main PCB
Filter PCB
4-way valve
Fan
A
Accumulator
Solenoid
Thermistor
(Compressor temp.)
Compressor
Choke coil
Thermistor
(Discharge temp.)
VIEW - A
03-01
Thermo Holder&
Thermistor (Outdoor Temp.)
Check valve
Pressure SW
AOU18
2-way valve (Liquid)
Coil (Expansion valve)&
Expansion valve
AOU24/ 36
3-way valve (Liquid)
Thermistor (Heat exchanger temp.)
3-way valve
(Gas)
03-02
1-1-2 WIRING (For AOU18/ 24/ 36RLX)
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
(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))
ENLARGED DETAIL
Thermistor(Outdoor temp.)
CLAMP
(Pressure SW wire &
Thermistor(Outdoor temp.))
Coil (Expansion valve)
BIND
(Thermistor
(Outdoor temp.))
B
Pressure SW
BIND
(Pressure SW wire &
Thermistor(Outdoor temp.))
Thermistor
(Heat exchanger temp.)
BIND
VIEW - B
(Thermistor
(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.)
Thermistor (Discharge temp.)
Thermistor (Outdoor temp.)
Thermistor (Heat exchanger temp.)
Pressure SW
Hook
(3 places)
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.
C
REAR VIEW
D
FRONT VIEW
Remove power supply &
Connection cord.
Remove the connectors
Remove the connectors
Terminal
G
G
VIEW - C
Choke coil
VIEW - D
INVERTER BOX
03-05
Remove the 1 mounting screw.
Remove the INVERTER BOX COVER upward.
INVERTER BOX COVER
F
Hook (2 places)
E
Remove the connector and cords.
Twist W6 and W7
4 times or more.
Twist W4 and W5
2 times or more.
CN1 (Black/Brown/Red)
W8 (Black)
W6 (Black)
W9 (White)
W4 (Black)
W5 (White)
W7 (White)
W200 (Red)
VIEW - E
03-06
Remove the connector and cords.
Twist 4 times or more
2 turn the Wire this way
" - " (Black)
" + " (Red)
" L2 " (Brown)
Thermistor (Heat sink)
" L1 " (White)
CN407
" P " (Yellow)
" N1 " (Blue)
VIEW - F
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
4
3
5
6
4
3
REAR VIEW
6
5
1
2
LEFT SIDE VIEW
Filter PCB
Main PCB
Remove the 2 mounting screws.
Remove the Filter PCB upward.
Remove the 1 mounting screw.
Remove the Main PCB upward.
Hook (3 places)
Hook (2 places)
Main PCB
Filter PCB
Screw
03-08
Screw
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)
INVERTER BOX A
FILTER PCB
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 - 7,
pull out the wires of MAIN PCB.
W12(Yellow)
W13(Blue)
Fig.5
Hook (3 places)
Fig.4
MAIN PCB
Screw
Fig.3
Fig.6/ 7
03-09
As shown in Fig.4, pull out the wires.
W16 (Red)
W17 (Black)
Thermistor
(Heat sink)
W303 (Black)
W304 (White)
W305 (Red)
CN407
Fig. 4
As shown in Fig.5, pull out the wires and fix them.
Hook (2 places)
W12 (Yellow)
W13 (Blue)
W17 (Black)
W16 (Red)
W303 (Black)
W304 (White)
W305 (Red)
Fig. 5
03-10
As shown in Fig.6, pull out the wires.
CN1
W200 (Red)
Fig. 6
As shown in Fig.7, pull out the wires.
A
W200 (Red)
HYIC1
CN1 wire with connector
Fig. 7
Don't come in contact with HYIC1.
DETAIL - A
03-11
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.
TM101 (Black line)
TM102 (White line)
Fig. 9
03-12
For AOU36RLX
As shown in Fig.8, connect wires.
CN34 (Yellow)
CN1 (White)
Fig. 8
As shown in Fig.9, connect wires.
W21 (Orange)
W22 (Orange)
PTC Thermistor
Through this hole.
TM101 (Black line)
TM102 (White line)
Fig. 9
03-13
As shown in Fig.10, fix the wire to INVERTER BOX A.
Pull out the wire
Hook (3 places)
Thermistor (Heat sink)
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)
Through the hole
Fig. 11
03-14
1-2 For AOU42RLX
1-2-1 PARTS LAYOUT DRAWING
Active Filter Module
Thermistor (Heat sink)
D,Power (Bridge)
Main PCB
Filter PCB
Heat Exchanger
Fan motor
Fan
Choke coil
4-way valve
Thermistor
(Discharge temp.)
Solenoid
Accumulator
Thermistor
(Compressor temp.)
Compressor
03-15
Thermo Holder&
Thermistor (Outdoor Temp.)
Pressure SW
Check valve
3-way valve (Liquid)
3-way valve (Gas)
Coil (Expansion valve)&
Expansion valve
Thermistor (Heat exchanger temp.)
03-16
1-2-2 WIRING (For AOU42RLX)
CLAMP
(Compressor wire)
BIND
Don't use this
CABLE CLIP.
(Thermistor (Discharge temp.))
(Thermistor (Compressor temp.))
(Thermistor (Heat exchanger temp.))
(Coil (Expansion valve))
CLAMP
(Compressor wire)
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
(Compressor wire)
CLAMP
(Fan motor wire x2)
CLAMP
(Solenoid wire)
ENLARGED DETAIL
03-17
Thermistor(Outdoor temp.)
Coil (Expansion valve)
CLAMP with U PIPE
(Thermistor (Heat exchanger temp.))
(Coil (Expansion valve))
Thermistor
(Heat exchanger temp.)
ENLARGED DETAIL
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.
C
REAR VIEW
D
FRONT VIEW
Remove power supply &
Connection cord.
Remove the connectors
Remove the connectors
Terminal
G
G
VIEW - C
Choke coil
VIEW - D
INVERTER BOX
03-21
Remove the 1 mounting screw.
Remove the INVERTER BOX COVER upward.
INVERTER BOX COVER
F
Hook (2 places)
E
Remove the connector and cords.
Twist W6 and W7
2 times or more.
W1 (Black)
W7 (White)
W200 (Red)
W6 (Black)
W2 (White)
VIEW - E
03-22
Remove the connector and cords.
"
" (White)
D,Power (Bridge)
"
" (Gray)
" L2 " (Brown)
" L1 " (White)
" - " (Black)
" + " (Red)
Thermistor (Heat sink)
CN407
BIND
" P " (Yellow)
" N1 " (Blue)
"P" (Yellow)
"N1"(Blue)
CN407
VIEW - F
03-23
Remove the 6 mounting screws.
Remove the INVERTER BOX A upward.
INVERTER BOX A
4
3
5
6
4
3
REAR VIEW
6
5
1
2
LEFT SIDE VIEW
Filter PCB
Main PCB
Remove the 2 mounting screws.
Remove the Filter PCB upward.
Remove the 1 mounting screw.
Remove the Main PCB upward.
Hook (3 places)
Hook (2 places)
Main PCB
Filter PCB
Screw
03-24
Screw
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)
INVERTER BOX A
FILTER PCB
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.5
W14(Yellow)
W15(Blue)
Hook (3 places)
MAIN PCB
Fig.4
Screw
Fig.6
Fig.3
03-25
As shown in Fig.4, pull out the wires.
Thermistor
(Heat sink)
CN407
W303 (Black)
W304 (White)
W305 (Red)
Fig. 4
As shown in Fig.5, pull out the wires and fix them.
W303 (Black)
W304 (White)
W305 (Red)
Hook (2 places)
W107 (White)
W108 (Violet)
CN407
Thermistor
(Heat sink)
Fig. 5
03-26
As shown in Fig.6, pull out the wires.
A
CN1 wire with connector
HYIC1
W200 (Red)
Fig. 6
Don't come in contact with HYIC1.
VIEW - A
As shown in Fig.7, connect wires.
CN34 (Yellow)
CN1 (White)
Fig. 7
03-27
As shown in Fig.8, connect wires.
W108 (Violet)
W107 (White)
Gray line
Make White line
on Black line
Twist 5 times or more.
Through this hole.
TM101 (Black line)
TM102 (White line)
Fig. 8
03-28
As shown in Fig.9, fix the wire to INVERTER BOX A.
Pull out the wire
through this opening
Hook (3 places)
Thermistor (Heat sink)
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)
Through the hole
Fig. 10
03-29
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
INTAKE GRILLE
PUSH
Pushbotton
(2 places)
Remove the GRILLE hinge wire.
Pull up while pressing the B section.
B
Part A detail view
A
GRILLE hinge wire
Part B section view
Remove the INTAKE GRILLE.
03-30
2. FILTER removal
Remove the FILTER.
Hook
(3 places)
FILTER
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
CLAMP
(PWB wire (For Power Supply PCB))
(Wire with connector (For Float SW))
(Wire with connector (For Remocon))
Thermistor(Room temp.)
CLAMP
(Wire with connector (For Float SW))
(Wire with connector (For Remocon))
Terminal-3P
Capacitor,Plastic
Controller PCB
Power Supply PCB
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))
CN1
(Power Supply PCB)
BLACK
CN17
(Remocon)
WHITE
CN6
(Drain Pump)
CN15
(Float SW)
RED
CN8
Thermistor
(Room temp.)
Detail View
CN7
Thermistor
(Heat Exchanger temp.)
CN10
(Stepping motor)
CN5
CN4
CN16
(MOTOR Feed Back)
(FAN MOTOR) (Capacitor)
Detail View
03-32
5. PANEL FRAME removal
Pull up the corner section (A) of the PANEL FRAME as shown in
figure (4 locations).
A
PANEL FRAME
A
A
B
A
Part A detail view
Pull up in the direction of the arrow while holding down
the C section of figure (4 locations).
C
Part B detail view
PANEL FRAME
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.
BOLT
(3places)
SCREW
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
M8 NUT
Washer(TURBO FAN)
TURBO FAN ASSY
The M8 special NUT should
be tightened with a torque of
1.96 - 7.84 N m.
For AUU36/ 42RCLX
M8 NUT
Washer(TURBO FAN)
TURBO FAN ASSY
The M8 special NUT should
be tightened with a torque of
1.96 - 7.84 N m.
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) -A
(3 places)
Rubber
(Vibration-proof) -B
(3 places)
For AUU36/ 42RCLX
Remove the 4 mounting nuts.
Remove the FAN MOTOR ASSY.
Special NUT M6
(4 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
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