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Seivice diagnosis
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 
Domestic air conditioner
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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
runË›
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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