LG ATNH09GRLE2 Svc Manual page 116

6.7 Troubleshooting Outdoor Error
CH 29 (Compressor Over Current)
Items
Purpose
Condition for Generation Increased compressor current exceeding the standard.
Installation &
Overload
Compressor
Expected
Causes
PCB
Assembly
Others
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Only for training and service purposes
Protection of IPM and compressor in the PCB assembly from over-
current.
Transfer of signals with detection of the flow of over-current in PSC/PFC,
blocking of a outdoor unit.
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
Compressor current detection circuit fault, DC link detection circuit fault,
and fault of single unit of IPM
Input of abnormal power and power connection fault
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Contents
4. Trouble Shooting
LGE Internal Use Only