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Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
Self-diagnosis function
Self-diagnosis function
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 master unit
213 : No.21 error of slave2
011 → 051 : No.105 error of master unit
Display 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
Operation mode between indoor unit and outdoor unit is different
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
When the addressing signal doesn't respond for 3mins. suddenly,
while the indoor unit gets the calling signal from the outdoor unit,
Indoor unit related error
Air temperature sensor of indoor unit
Inlet pipe temperature sensor of indoor unit
Transmission error : wired remote controller
↔ indoor unit
Drain pump
Transmission error : outdoor unit ↔ indoor
unit
Outlet pipe temperature sensor of indoor unit
Different operation mode
Serial No.
Poor fan motor operation
Transmission error: indoor unit → main PCB
of outdoor.
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03-
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