2U14CS1ERA-SM
Service diagnosis
57
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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