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Copyright ©2009 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
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 number of times the error has
been recorded against it.
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 03 Outdoor Air Thermistor Error (PTHP Only)
CH 04 Outdoor Coil Thermistor Error (PTHP Only)
CH 05 Mode Error
CH 06 Set point Error
CH 07 Bad Thermistor Wiring
CH 09 Pressure Switch Error
• Manual Controls
ON Normal
OFF No power / failed board
Fault Codes
1 Indoor Air Thermistor Error
2 Indoor Coil Thermistor Error
3 Outdoor Air Thermistor Error (PTHP Only)
4 Outdoor Coil Thermistor Error (PTHP Only)
5 Mode Error
6 Set point Error
7 Bad Thermistor Wiring
LED Flash Rate
0.25 sec On per flash, 0.25 sec OFF between flashes,
2.00 sec OFF between codes.
1.3 SELF-DIAGNOSIS
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