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