Self-Diagnosis Function - LG AK-Q240BC01 Installation Manual

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 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 master unit, 862 : No.86 error of Slave Unit,
011 → 051 : No.105 error of Master Unit
Display
Air temperature sensor of indoor unit
0 1 -
(only return air sensor was installed)
Communication error : wired remote
0 3 -
controller ÷ indoor unit
Communication error : outdoor unit ÷
0 5 -
indoor unit
0 9 - Indoor EEPROM Error
1 Master Inverter Compressor IPM Fault
2 1
Slave Inverter Compressor IPM Fault
2
(For 20/23/25RT Only)
Inverter Board Input Over Current (RMS)
1
of Master
2 2
Inverter Board Input Over Current (RMS)
2
of Slave (For 20/23/25RT Only)
Master Inverter Compressor DC link
1
Low Voltage
2 3
Slave Inverter Compressor DC link Low
2
Voltage (For 20/23/25RT Only)
1 Master High Pressure Switch
2 4
Slave High Pressure Switch (For
2
20/23/25RT Only)
Master Unit Input Voltage High/ Low
1
Voltage
2 5
Slave Unit Input Voltage High/ Low
2
Voltage (For 20/23/25RT Only)
1 Master Inverter Compressor Start Failure
2 6
Slave Inverter Compressor Start Failure
2
(For 20/23/25RT Only)
Master Inverter DC link High
1
Voltage
2 8
Slave Inverter DC link High
2
Voltage (For 20/23/25RT Only)
Master Inverter Compressor Over
1
Current
2 9
Slave Inverter Compressor Over Current
2
(For 20/23/25RT Only)
Title
Air temperature sensor of indoor unit is open or short
Failing to receive wired remote controller signal in indoor
unit PCB
Failing to receive outdoor unit signal in indoor unit PCB
In case when the serial number marked on EEPROM of
Indoor unit is 0 or FFFFFF
Master Inverter Compressor Drive IPM Fault
Slave Inverter Compressor Drive IPM Fault
Master Inverter Board Input Current excess (RMS)
Slave Inverter Board Input Current excess (RMS)
DC charging is not performed at Master after starting
relay turn on.
DC charging is not performed at Slave after starting
relay turn on.
System is turned off by Master high pressure switch.
System is turned off by Slave high pressure switch.
Master Unit input voltage is abnormal
Slave Unit input voltage is abnormal
The First Start Failure by Master Inverter Compressor
Abnormality
The First Start Failure by Slave Inverter Compressor
Abnormality
System is turned off by Master DC Voltage Over
Charging
System is turned off by Slave DC Voltage Over Charging
Master Inverter Compressor Fault OR Drive Fault
Slave Inverter Compressor Fault OR Drive Fault
INSTALLATION OF UNIT
Cause of Error
29