Self-Diagnosis Function - LG ARUN BTE4 Series 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 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,3rd LED of 7-segment indicates error number, 4th LED indicates unit number.(* = 1: Master, 2: Slave 1, 3: Slave 2)
Ex)
Repeat
Error No. of Unit
Error No. of Compressor
Error No.
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
1 7 - Inlet Air temperature sensor of FAU
2 1 * Master Outdoor Unit Inverter Compressor IPM Fault
Inverter Board Input Over Current(RMS) of Master
2 2 *
Outdoor Unit
Master Outdoor Unit Inverter Compressor DC link
2 3 *
Low Voltage
2 4 * Master Outdoor Unit High Pressure Switch
2 5 * Master Outdoor Unit Input Voltage High/ Low Voltage
Master Outdoor Unit Inverter Compressor Start
2 6 *
Failure
Master Outdoor Unit Inverter Compressor Over
2 9 *
Current
Master Outdoor Unit Inverter Compressor1 High
3 2 *
Discharge Temperature
Master Outdoor Unit Inverter Compressor2 High
3 3 *
Discharge Temperature
3 4 * High Pressure of Master Outdoor Unit
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
Air temperature sensor of indoor unit is open or short
Master Outdoor Unit Inverter Compressor Drive IPM Fault
Master Outdoor Unit Inverter Board Input Current excess (RMS)
DC charging is not performed at Master Outdoor Unit after start-
ing relay turn on.
System is turned off by Master Outdoor Unit high pressure switch.
Master Outdoor Unit input voltage is over 242V or below 198V
The First Start Failure by Master Outdoor Unit Inverter Compres-
sor Abnormality
Master Outdoor Unit Inverter Compressor Fault OR Drive Fault
Master Outdoor Unit Inverter Compressor1 High Discharge Tem-
perature
Master Outdoor Unit Inverter Compressor2 High Discharge Tem-
perature
High Pressure of Master Outdoor Unit
27