Si10-417 Troubleshooting
Service Diagnosis 27
5.1.3 Fan Motor (AC Motor) or Related
Abnormality
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 is less than 50% of
the HH tap under maximum fan motor rotation demand.
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 indoor unit PCB.
Trouble
shooting
Check No.16
Refer to
P.167
Rotate the fan by hand.
Operate the fan.
Does it rotate?
NO
Does it rotate
smoothly?
Is it at the
rated voltage?
Is there
conductivity?
NO
Check the capacitor's
conductivity
Check the fan motor voltage.
(immediately after re-start)
NO
NO
YES
YES
YES
YES
Replace the fan motor
∗2 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 indoor
unit PCB (1)
Replace the capacitor.
(Replace PCB (1).)
Replace the fan
motor.
Caution
Be sure to turn off power switch before connect or
disconnect connector, or parts damage may be occurred.
A
Si10-417.fm Page 27 Wednesday, September 22, 2004 6:38 PM
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