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• A current transformer (CT) is detected by checking the compressor running frequency (  rated frequency) and CT detected input

current (less than 0.65A) for continuously 20 seconds.

• CT defective.
• Outdoor PCB defective.
• Compressor defective (low compression).

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• The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor (feedback of

rotation > 2550rpm or < 50rpm).

• Operation stops due to short circuit inside the fan motor winding.
• Operation stops due to breaking of wire inside the fan motor.
• Operation stops due to breaking of fan motor lead wires.
• Operation stops due to Hall IC malfunction.
• Operation error due to faulty indoor unit PCB.

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• During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature

sensor are used to determine sensor errors.

• Faulty connector connection.
• Faulty sensor.
• Faulty  PCB.

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• During startup and operation of cooling and heating, the temperatures detected by the indoor heat exchanger temperature 

sensor 2 are used to determine sensor errors.

• Faulty connector connection.
• Faulty sensor.
• Faulty PCB.