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22
Self-Diagnosis Function
Error Indicator
- This function indicates types of failure in self-diagnosis and occurrence of failure for air condition.
- Error mark is displayed on display window of indoor units and wired remote controller, and 7-segment LED of outdoor unit control board as
shown in the table.
- If more than two troubles occur simultaneously, lower number of error code is first displayed.
- After error occurrence, if error is released, error LED is also released simultaneously.
Error Display
1st, 2nd LED of 7-segment indicates error number, 3rd LED indicates unit number.
Ex) 211 : No.21 error of unit
011 ' 051 : No.105 error of unit
Display
0
1
-
Air temperature sensor of indoor unit
0
2
-
Inlet pipe temperature sensor of indoor unit
Communication error : wired remote controller ÷
0
3
-
indoor unit
0
4
-
Drain pump
Communication error : outdoor unit ÷ indoor unit
0
5
-
0
6
-
Outlet pipe temperature sensor of indoor unit
0
9
-
Indoor EEPROM Error
1
0
-
Poor fan motor operation
2
1
1
Outdoor Unit Inverter Compressor IPM Fault
Inverter Board Input Over Current(RMS) of Out-
2
2
1
door Unit
Outdoor Unit Inverter Compressor DC link Low
2
3
1
Voltage
2
4
1
Outdoor Unit High Pressure Switch
2
6
1
Outdoor Unit Inverter Compressor Start Failure
2
9
1
Outdoor Unit Inverter Compressor Over Current
Outdoor Unit Inverter Compressor High Discharge
3
2
1
Temperature
3
4
1
High Pressure of Outdoor Unit
3
5
1
Low Pressure of Outdoor Unit
3
6
1
Outdoor Unit Low Condensing Ratio Limited
Communication error between Outside unit PFC
3
9
1
and inverter board
Title
Cause of Error
Air temperature sensor of indoor unit is open or short
Inlet pipe temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor unit PCB
Malfunction of drain pump
Failing to receive outdoor unit signal in indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector / Failure of indoor
fan motor lock
Outdoor Unit Inverter Compressor Drive IPM Fault
Outdoor Unit Inverter Board Input Current excess (RMS)
DC charging is not performed at outdoor unit after starting relay
turn on.
System is turned off by outdoor unit high pressure switch.
The First Start Failure by Outdoor Unit Inverter Compressor Ab-
normality
Outdoor Unit Inverter Compressor Fault OR Drive Fault
System is turned off by outdoor unit Inverter Compressor High
Discharge Temperature
System is turned off by excessive increase of high pressure of
outdoor unit
System is turned off by excessive decrease of low pressure of
outdoor unit
Outdoor Unit stayed under low condensing limit for 3 minutes
Outside unit inverter compressor current detection (CT) sensor
disconnection or short circuit
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