Fan Motor Or Related Abnormality; Ac Motor - Daikin D-Series Service Manual

Troubleshooting
5.5

Fan Motor or Related Abnormality

5.5.1

AC Motor

A6
Remote
Controller
Display
Method of The rotation speed detected by the
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
Supposed
Causes
Troubleshooting
Check No.16
Refer to P.269
214
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 control 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
Hall IC during fan motor operation is used to determine
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
Si12-619A
NO
Replace the fan motor or control
PCB.
Replace the fan motor
NO
Replace control PCB.
Replace the fan motor.
Replace the control PCB.
∗ Measure the voltage between
the red and black lead wires of
the fan motor, and check if the
maximum voltage reaches the
rated voltage.
Replace the capacitor.
(Replace the control PCB.)
Replace the fan motor.
Service Diagnosis
(R3219)