LG ATNH09GRLE2 Svc Manual page 115

4. Trouble Shooting
6.7 Troubleshooting Outdoor Error
CH 27/73 (PSC/PFC Fault Error)
Items for
checking
Checking
power source
Checking
for
over-load
operation
Checking
compressor
Checking
PCBA
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Only for training and service purposes
Checking
Checking
input voltage connection
Checking
Checking
outdoor
devices for
fan operation
shielding
Checking
refrigerant
for over/shorts
Checking
Checking
compressor
compressor
wiring
resistance
Distance
Checking input
between
current detection
heatsink and
panel
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Sub-items for
checking
Checking
power reactor
Terminal
state connection
Checking
pipes
outdoor
for Bending /
blocking
Checking
compressor
phase insulation
resistance
circuit
Checking EEV
for motion
LGE Internal Use Only