LG Multi V - 1. The phenomena from main component failure

Troubleshooting Guide
- 89 -
Copyright ©2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
■ Error diagnosis and countermeasure flow chart
1. Bad connection of low pressure connector
2. Defect of low pressure connector (Open/Short)
3. Defect of outdoor PCB
1. Bad connection of high pressure connector
2. Defect of high pressure connector (Open/Short)
3. Defect of outdoor PCB
Error
No.
Error Type Error Point Main Reasons
Abnormal value of
sensor
(Open/Short)
Abnormal value of
sensor
(Open/Short)
Sensor error of low
pressure
Sensor error of high
pressure
42
43
Is sensor connected
to PCB correctly?
Connect sensor to PCB correctly
Yes
No
No
After replacement of
outdoor unit main PCB
is the system normal?
Yes
Replace corresponding
pressure sensor
END
Low pressure sensor
High pressure sensor