Daikin FTXG25EV1BS Service Manual Page 214

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Troubleshooting SiEBE12-625
204 Service Diagnosis
5.5 Fan Motor or Related Abnormality
5.5.1 AC Motor
Remote
Controller
Display
A6
Method of
Malfunction
Detection
The rotation speed detected by the Hall IC during fan motor operation is used to determine
abnormal fan motor operation.
Malfunction
Decision
Conditions
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.
Supposed
Causes
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.
Troubleshooting
Check No.16
Refer to P.248
u
rn off power switch before connect or disconnect connector,
m
age may be occurred.
Check No. 16
Check Hall IC
YES
(R3219)
Operate the fan.
Does it rotate?
Rotate the fan by hand.
Check the capacitor's
conductivity
Is there conductivity?
Check the fan motor voltage.
(immediately after re-start)
Is it at the rated voltage?
Be sure to turn off power switch before connect or disconnect connector,
or parts damage may be occurred.
Replace the fan motor or control
PCB
Replace the fan motor
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.
Caution
Does it rotate smoothly?
Check No. 16
Check Hall IC
Is there an output?
Check the fan motor voltage.
Is it at the rated voltage?
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
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