LG ATNH09GRLE2 Svc Manual page 114

6.7 Troubleshooting Outdoor Error
CH 27/73 (PSC/PFC Fault Error)
Items
Purpose
Condition for Generation Transfer of signals with detection of the flow of over-current in PSC/PFC
Installation &
Overload
Compressor
Expected
Causes
PCB
Assembly
Others
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Only for training and service purposes
Prevention of the damage of PCBA, wire, and connector caused by
over-current
Transfer of signals with detection of the flow of over-current in PSC/PFC,
Outdoor device shielding
Open/Short of the coil in the compressor, insulation breaking between
the coil in the compressor and the sash, damage of compressor with
abrasion, and compressor connection fault
Damage of PSCM/PFCM and input current detection circuit fault
Input of abnormal power, power connection fault, reactor terminal con-
nection fault, and faulty distance between heatsink and sash
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Contents
4. Trouble Shooting
LGE Internal Use Only