Part 4 Trouble Shooting
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Only for training and service purposes
LGE Internal Use Only
1. Self-diagnosis Function
1.1 Error Indicator (Indoor)
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.
Indoor Error
Code Title Cause of Error
1 Air temperature sensor of Indoor unit
Air temperature sensor of indoor unit is
open or short
2
Inlet pipe temperature
Sensor of indoor unit
Inlet pipe temperature sensor of indoor unit
is open or short
3
Communication error : wired remote
controller ↔ indoor unit
Failing to receive wired remote controller
signal in indoor unit PCB
4 Drain pump Malfunction of drain pump
5
Communication error : outdoor unit ↔
indoor unit
Failing to receive outdoor unit signal in
indoor unit PCB
6
Outlet pipe temperature sensor of indoor
unit
Outlet pipe temperature sensor of indoor
unit is open or short
9 Indoor EEPROM Error
In case when the serial number marked on
EEPROM of Indoor unit is 0 or FFFFFF
10 Abnormal fan motor operation
Disconnecting the fan motor connector/
Failure of indoor fan motor lock
• Indoor Fan RPM Up / Down at installation
• Remote Control Power is repeated On/Off
If this phenomenon is generated, check the condition of N phase wiring
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