LG Multi V ARUB Series Installation Manual page 72

Test Run
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.
Display
0 1 Air temperature sensor of indoor unit
Inlet pipe temperature sensor of
0 2
indoor unit
Transmission error : wired remote
0 3
controller ↔ indoor unit
0 4 Drain pump
Transmission error : outdoor unit ↔
0 5
indoor unit
Outlet pipe temperature sensor of
0 6
indoor unit
Serial No.
0 9
Poor fan motor operation
1 0
Transmission error: indoor unit ' main
1 1 PCB of outdoor.
2 1 DC peak
2 2 Overcurrent of inverter comp.
Poor voltage charge for driving INV
2 3
compressor
High pressure switch of main outdoor
2 4
unit
2 5 Low/Over voltage
Discharge temperature of main out-
3 2
door unit (INV compressor)
Discharge temperature of main out-
3 3 door unit (constant speed compres-
sor)
High pressure of main outdoor unit
3 4
Low pressure of main outdoor unit
3 5
72 Outdoor Unit
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 at indoor unit
PCB
Malfunction of drain pump
Failing to receive outdoor unit signal at indoor unit PCB
Outlet pipe temperature sensor of indoor unit is open or short
In the case that the serial number marked on
EEPROM of Indoor unit is 0 or FFFFFF
Disconnecting the fan motor connector/Failure or indoor fan
motor lock.
When the signal doesn't come out for 3mins. suddenly, while
the indoor unit gets the calling signal coming from the out-
door unit
IPM fault or overcurrent to compressor
Overcurrent flows to inverter compressor
DC charging is not performed after starting relay turn on
System is off by high pressure switch
Input voltage is out of tolerable range.
System is off due to rising of INV compressor discharge tem-
perature
System is off due to rising of constant speed compressor dis-
charge temperature
System is off by excessive increase of high pressure of main
outdoor unit
System is off by excessive decrease of low pressure of main
outdoor unit
Cause of Error