Fan Motor Or Related Abnormality - Daikin Super Multi Plus D-Series Service Manual

Troubleshooting for RA Indoor Unit
4.3

Fan Motor or Related Abnormality

4.3.1 AC Motor (Wall 20~35 C series, Duct, Floor / Ceiling)
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 is less than 50% of the HH tap under maximum fan motor
rotation demand.
Decision
Conditions
Supposed
Causes
Troubleshooting
Check No.16
Refer to P.267
260
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
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
SiEBE18-526
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.
Troubleshooting
(R3219)