Self-Diagnosis - LG LP156CD5A Service Manual

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 number of times the error has
been recorded against it.
The errors are the mentioned which is as follows:
• Electrical Controls
ON
OFF
Fault Codes
CH 01
CH 02
CH 03
CH 04
CH 05
CH 06
CH 07
CH 09
• Manual Controls
ON
OFF
Fault Codes
1
2
3
4
5
6
7
LED Flash Rate
Copyright ©2010 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Normal
No power / failed board
Indoor Air Thermistor Error
Indoor Coil Thermistor Error
Outdoor Air Thermistor Error (PTHP Only)
Outdoor Coil Thermistor Error (PTHP Only)
Mode Error
Set point Error
Bad Thermistor Wiring
Pressure Switch Error
Normal
No power / failed board
Indoor Air Thermistor Error
Indoor Coil Thermistor Error
Outdoor Air Thermistor Error (PTHP Only)
Outdoor Coil Thermistor Error (PTHP Only)
Mode Error
Set point Error
Bad Thermistor Wiring
0.25 sec On per flash, 0.25 sec OFF between flashes,
2.00 sec OFF between codes.
- 6 -
LGE Internal Use Only