Service Manual

Troubleshooting SiUS041638E
61 Service Diagnosis
4.4 Indoor Fan Motor (DC Motor) or Related Abnormality
Error Code
A6
Method of Error
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Error Decision
Conditions
The detected rotation speed does not reach the demanded rotation speed of the target tap, and is
less than 50% of the maximum fan motor rotation speed.
Supposed
Causes
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Remarkable decrease in power supply voltage
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Layer short inside the fan motor winding
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Breaking of wire inside the fan motor
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Breaking of the fan motor lead wires
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Defective capacitor of the fan motor
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Defective indoor unit PCB