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19.27 Outdoor Current Transformer Open Circuit (F42-11)
Malfunction Decision Conditions
• A current transformer (CT) open circuit is detected by checking the compressor running frequency (> 50Hz) and
CT detected input current (< 1.6A) for continuously 60 seconds.
Malfunction Caused
• CT defective.
• Faulty outdoor unit PCB (main).
• Compressor defective (low compression).
Troubleshooting
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