LG CT18 NQ2 User Manual

4. Trouble Shooting
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Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1. Self-diagnosis Function
1.1 Error Indicator (Indoor)
Ceiling Cassette Type Display
The number of times to blink = Error code
10 degrees 1 degrees
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 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

LG CT18 NQ2 Specifications

General

Brand	LG
Model	CT18 NQ2
Category	Air Conditioner
Language	English