Panasonic WH-SDC12F6E5 Service Manual page 145

17.5.36 Outdoor Current Transformer Open Circuit (F46)
Malfunction Decision Conditions:
A current transformer (CT) open circuit is detected by checking the compressor running frequency ( rated
frequency) and CT detected input current (< 0.65 A) for continuously 20 seconds.
Malfunction Caused:
1 CT defective.
2 Faulty outdoor unit PCB (main).
3 Compressor defective (low compression).
Abnormality Judgment:
Continue 3 times in 20 minutes.
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