LG Multi V ARUN***LM3 Series Installation Manual page 65

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 outdoor unit
011 ' 051 : No. 105 error of outdoor unit
❈ Refer to the DX-Venitilation manual for DX-Venitilation error code
Display
0 1 - Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor
0 2 -
unit
Communication error : wired remote con-
0 3 -
troller ÷ indoor unit
0 4 - Drain pump
Communication error : outdoor unit ÷
0 5 -
indoor unit
Outlet pipe temperature sensor of indoor
0 6 -
unit
0 9 - Indoor EEPROM Error
1 0 - Poor fan motor operation
Outdoor unit Inverter Compressor IPM
2 1 1
Fault
Inverter Board Input Over Current(RMS)
2 2 1
of Outdoor Unit
Outdoor unit Inverter Compressor DC link
2 3 1
Low Voltage
2 4 1 Outdoor unit High Pressure Switch
Title
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 start-
ing relay turn on.
System is turned off by Outdoor unit high pressure
switch.
Test Run
Cause of Error
Installation Manual 65