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1.3 SELF-DIAGNOSIS
FUNCTION:
If the unit has a malfunction, a green OPERATION LED located on the Display PCB used by the unit to indicate the errors.
USE:
If the customer has to register a complaint to the service center, he can be very clear about registering the complaint that what is
happening & by referring the user's manual the customer can clearly define the problem.
So that the engineer should go fully prepared with the prescribed tools to be used regarding that problem. It also keeps the customer
aware about the unit.
Here are some of the problems defined below for which the LED indicates by flashing.
The errors are the mentioned which is as follows:
• Electrical Controls
ON
Normal
OFF
No power / failed board
Fault Codes
CH 01
Indoor Air Thermistor Error
CH 02
Indoor Coil Thermistor Error
CH 07
Themostat Wiring Error
CH 09
EEPROM Check Sum Error
CH 10
Indoor Fan Error
CH 34
High Pressure Switch Error
CH 44
Outdoor Air Thermistor Error (PTHP Only)
CH 45
Outdoor Coil Thermistor Error (PTHP Only)
CH 67
Outdoor Fan Error
Copyright ©2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
- 7 -
LGE Internal Use Only
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