Fan Motor (Ac Motor) Or Related Abnormality - Daikin FLKS25BAVMB Service Manual

Troubleshooting
3.4

Fan Motor (AC Motor) or Related Abnormality

A6
Remote Control
Display
Method of The rotation speed detected by the Hall IC during fan motor operation is used to determine
Malfunction abnormal fan motor operation.
Detection
Malfunction
The detected rotation speed does not reach the demanded rotation speed of the target tap, and
Decision is less than 50% of the maximum fan motor rotation speed.
Conditions
„ Layer short inside the fan motor winding
Supposed
„ Breaking of wire inside the fan motor
Causes
„ Breaking of the fan motor lead wires
„ Defective capacitor of the fan motor
„ Defective indoor unit PCB
Troubleshooting
Check No.16
Refer to P.110
72
Be sure to turn off the power switch before connecting or disconnecting
Caution
connectors, or parts may be damaged.
Start operation.
Does the fan rotate?
NO
Turn off the power supply and
rotate the fan by hand.
Does the fan rotate
smoothly?
YES
Turn the power on and check the
fan motor voltage.
(immediately after restart)
Is it the rated
voltage?
YES
Check the capacitor's continuity.
Is there continuity?
NO
YES
Check No. 16
Check Hall IC
Is there an output?
NO
YES
Check the fan motor voltage.
Is it the rated
voltage?
YES
NO
YES
SiENBE05-722_A
NO
Replace the fan motor or indoor
unit PCB.
Replace the fan motor.
NO
Replace the indoor unit PCB.
Replace the fan motor.
Replace the indoor unit PCB.
Replace the capacitor.
(Replace the indoor unit PCB.)
Replace the fan motor.
(R3869)
Service Diagnosis