Service Diagnosis
54
Domestic Air Conditioner
7.4.4 Outdoor DC fan motor fault
Check whether Terminal on the outdoor
mainboard is well inserted.
Is it normal?
Yes
NO
Reinsert the terminals
Electrify the machine again and turn it
on in the Cool state with the remote
controller. check whether motor can
run˛
Yes
Measure the voltage between 3 and 6 of
the terminal about 0-5v.
Is it normal?
N0
the motor of the outdoor unit is damaged and
needs replacing.
Measure the voltage between 1 and 3 of the terminal of
fan motor on the mainboard about DC310V,Measure the
voltage between 3 and 4 of the terminal about DC15V.
Measure the voltage between 5 and 3 of the terminal
about 1-6v.
NO
Is it normal?
The mainboard of the outdoor unit is
damaged and needs replacing
N0
Yes
Yes
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