Daikin FTXS09HVJU Service Manual page 114

Troubleshooting
4.4.2 DC Motor
A6
Remote
Controller
Display
The rotation speed detected by the Hall IC during fan motor operation is used to determine
Method of
abnormal fan motor operation.
Malfunction
Detection
Malfunction When 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.
Decision
Conditions
 Operation halt due to short circuit inside the fan motor winding.
Supposed
 Operation halt due to breaking of wire inside the fan motor.
Causes
 Operation halt due to breaking of the fan motor lead wires.
 Operation halt due to faulty capacitor of the fan motor.
 Detection error due to faulty indoor unit PCB.
Service Diagnosis
SiUS04-904
103