MXS Service Manual

SiUS121736EA Troubleshooting for RA Indoor Unit
Service Diagnosis 154
5.3 Indoor Fan Motor or Related Abnormality
5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality
Applicable
Models
CTXG09/12/18QVJUW(S)
FTXR09/12/18TVJUW(S)
CTXS07LVJU
FTXS09/12/15/18/24LVJU
FVXS09/12/15/18NVJU
Error Code A6
Method of Error
Detection
The rotation speed detected by the Hall IC during indoor fan motor operation determines 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
 Remarkable decrease in power supply voltage
 Layer short inside the fan motor winding
 Breaking of wire inside the fan motor
 Breaking of the fan motor lead wires
 Defective capacitor of the fan motor
 Defective indoor unit PCB