Haier HSU-09H03/R(DB) [79/131] Fan motor dc motor or related abnormality

Haier HSU-09H03/R(DB) [79/131] Fan motor dc motor or related abnormality
7.4.3 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 singal don’t receiced in 2 minutes
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Operation halt due to short circuit inside the fan motor winding.
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Operation halt due to breaking of wire inside the fan motor .
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Operation halt due to breaking of the fan motor lead wires
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Dedection error due to faulty indoor unit PCB
How to check Fan Motor (DC)
1. Check connector connection.
2. Check motor power supply voltage output (pins 1-4).
3. Check motor control voltage (pins 4-5).
4. Check rotation command voltage output (pins 4-6).
5. Check rotation pulse input (pins 4-7).
Notes:the a/c is electrifying,don’t pull out or insert the terminals of
the motor,else the motor would be damaged
Demastic Air Conditioners
+6809,12H03/R(DB)
System Diagnosis
76

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