Panasonic CS-TZ25ZKEW Service Manual page 156

18.4.18 H97 (Outdoor Fan Motor – DC Motor Mechanism Locked)
Malfunction Decision Conditions

The rotation speed detected by the Hall IC during fan motor operation is used to determine abnormal fan motor.
Malfunction Caused

Operation stops due to short circuit inside the fan motor winding.

Operation stops due to breaking of wire inside the fan motor.

Operation stops due to breaking of fan motor lead wires.

Operation stops due to Hall IC malfunction.

Operation error due to faulty outdoor unit PCB.
Troubleshooting
Turn off power supply
and rotate fan by
Does fan rotate
Turn power supply on
and operate fan.
Does it rotate?
Check the fan motor
rotation condition.
Does it have run-stop
hand.
No
Replace fan
smoothly?
Yes
No
Yes
Replace
symptom? fan motor
No
Replace
outdoor PCB
motor.
Caution
Turn off power supply
and disconnect fan motor
connector.
Check the fan motor
winding resistance at
CN-MTR2
Is the winding open / short,
resistance value not
uniform / very much
different?
156
For safety reason and to prevent
component breakdown, always switch
off the power before remove and
connect the component.
No
Replace
outdoor PCB
Yes
Replace
fan motor