LG UU85W U74 - Page 70

- 70 -
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Part 4 Trouble Shooting
Items for
checking
Sub-items for
checking
Checking
power source
Checking
for
over-load
operation
Checking
compressor
Checking
PCBA
Checking
input voltage
Checking
outdoor
devices for
shielding
Checking
refrigerant
for over/shorts
Checking
compressor
wiring
Checking
power
connection
state
Checking
reactor
Terminal
connection
Checking
outdoor
fan operation
Checking
compressor
phase
resistance
Checking
pipes
for Bending /
blocking
Checking
compressor
insulation
resistance
Checking EEV
for motion
※ Check for AC190~260V ※ Check the reactor terminal insertion state.
※ Manifold gauge
Flow of trouble diagnosis
Distance
between
heatsink and
panel
Checking input
current detection
circuit
※ Not less than
6mm of distance
6.6 Troubleshooting Outdoor Error
CH 27/73 (PSC/PFC Fault Error)