LG AMNW07GSJA0 Svc Manual page 139

5. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 27/73 (PSC/PFC Fault Error)
Flow of trouble diagnosis
Items for
checking
Checking
power source
Checking
for
over-load
operation
Checking
compressor
Checking
PCBA
Checking
Checking
input voltage connection
❈ Check for AC 190~260 V
Checking
Checking
outdoor
devices for
fan operation
shielding
Checking
refrigerant
for over/shorts
❈ Manifold gauge
Checking
Checking
compressor
compressor
wiring
resistance
Checking
Checking input
PFC circuit
current detection
part
- 138 -
Sub-items for
checking
Checking
power reactor
Terminal
state connection
❈ Check the reactor terminal insertion state.
Checking
pipes
outdoor
for Bending /
blocking
Checking
compressor
phase insulation
resistance
circuit
Copyright © 2016 - 2020 LG Electronics Inc.
All rights reserved. Only training and service purposes.
Checking EEV
for motion