Indoor Fan Motor Or Related Abnormality - Daikin 4MXL-T Series Service Manual

SiUS121827E
5.3

Indoor Fan Motor or Related Abnormality

5.3.1 Indoor Fan Motor (DC Motor) or Related Abnormality
Applicable
FTXR09/12/18TVJUW(S)
Models CTXG09/12/18QVJUW(S)
CTXS07LVJU
FTXS09/12/15/18/24LVJU
FVXS09/12/15/18NVJU
A6
Error Code
Method of Error The rotation speed detected by the Hall IC during indoor fan motor operation determines abnormal
Detection fan motor operation.
Error Decision The detected rotation speed does not reach the demanded rotation speed of the target tap, and is
Conditions less than 50% of the maximum fan motor rotation speed.
Supposed
 Remarkable decrease in power supply voltage
Causes  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
Part 6 Service Diagnosis
Troubleshooting for RA Indoor Unit
167