Fan Motor Or Related Abnormality - Daikin CTXS09GVJU Service Manual

SiUS12-814
5.5

Fan Motor or Related Abnormality

5.5.1 AC Motor
A6
Remote
Controller
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
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
Supposed
Causes
Troubleshooting
Check No.16
Refer to P.167
Service Diagnosis
Operation halt due to short circuit inside the fan motor winding.
Operation halt due to breaking of wire inside the fan motor.
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.
Be sure to turn off power switch before connect or disconnect connector,
Caution or parts damage may be occurred.
Operate the fan.
Does it rotate?
NO
Rotate the fan by hand.
Does it rotate smoothly?
YES
Check the fan motor voltage.
(immediately after re-start)
Is it at the rated voltage?
YES
Check the capacitor's conductivity
Is there conductivity?
NO
YES
Check No. 16
Check Hall IC
Is there an output?
NO
YES
Check the fan motor voltage.
Is it at the rated voltage?
YES
NO
YES
Troubleshooting
NO
Replace the fan motor or control
PCB.
Replace the fan motor.
NO
Replace control PCB.
Replace the fan motor.
Replace the control PCB.
Replace the capacitor.
(Replace the control PCB.)
Replace the fan motor.
(R3869)
117