Fan Motor(Dc Motor) Or Related Abnormality - Haier Arc Series Service Manual

7.3.3.Fan Motor(DC Motor) or Related Abnormality

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The rotation speed detected by the Hall IC during fan motor operation is used to determine
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abnormal fan motor operation
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when the detected rotation feedback signal don't received in 2 minutes
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How to check Fan Motor (DC)
1. Check connector connection.
2. Check motor power supply voltage output (pins 4-7).
3. Check motor control voltage (pins 4-3).
4. Check rotation command voltage output (pins 4-2).
5. Check rotation pulse input (pins 4-1).
Notes:the a/c is electrifying,don't pull out or insert the terminals of the
motor,else the motor would be damaged
&DXWLRQ Be sure to turn off power switch before connect or disconnect connector,
Troubleshooting
HSU-24C03/Z HSU-24H03/Z
Power
on
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
Detection error due to faulty indoor unit PCB
damage may be occurred.
Code indication
timer operate
flash off
51
Service Diagnosis
or parts
Domestic Air Conditioner