Indoor Fan Motor (Dc Motor) Or Related Abnormality - Daikin FTKM-U Series Service Manual

SiMX042215E
4.4

Indoor Fan Motor (DC Motor) or Related Abnormality

A6
Error Code
Method of Error
 The rotation speed detected by the microcomputer during fan motor operation is used to
Detection
 The fan motor stops its rotation within 5 seconds after the operation starts.
Error Decision
The detected rotation speed does not reach the demanded rotation speed of the target tap, and
Conditions is 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 indoor unit PCB
Part 6 Service Diagnosis
determine abnormal fan motor operation.
Troubleshooting
59