Self-Diagnosis Function; Error Indicator (Indoor) - LG ATNH09GRLE2 Svc Manual

1. Self-diagnosis Function

1.1 Error Indicator (Indoor)

Ceiling Cassette Type Display
The number of times to blink = Error code
Error Indicator
• The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.
• Error mark is ON/OFF for the operation LED of evaporator body in the same manner as the following table.
• If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
• After error occurrence, if error is released, error LED is also released simultaneously.
• To operate again on the occurrence of error code, be sure to turn off the power and then turn on.
• Having or not of error code is different from Model.
Indoor Error
Code
1 Air temperature sensor of Indoor unit
Inlet pipe temperature
2
Sensor of indoor unit
Communication error : wired remote
3
controller ↔ indoor unit
4 Drain pump
Communication error : outdoor unit
5
indoor unit
Outlet pipe temperature sensor of indoor
6
unit
9 Indoor EEPROM Error
10 Abnormal fan motor operation
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Only for training and service purposes
10 degrees 1 degrees
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
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4. Trouble Shooting
LGE Internal Use Only