Compressor Troubles - LG multi V PLUS Service Manual

Self-diagnosis function
Compressor.
Start of check
Is there difference
between high pressure and
low pressure after
operation?
Yes
Is current value
normal when operating the
compressor?
Yes
No failure of compressor.
286 Trouble Shooting Guide
No
Is R.S.T. power
connection normal?
Is signal normally applied
from the PCB?
No
Is the direction of
4way valve normal?
Replace the
compressor.
Is there difference
between high pressure and
low pressure after
No
Yes
No
Yes
No
Yes
Restart.
No
operation?
Yes
Check or reconnect
power lines
Replace the PCB.
Check or replace
4way valve
Replace the compressor.