Haier AS18TD2HRA Service Manual page 35

Check whether Terminal on the outdoor
mainboard is well inserted.
Is it normal?
Yes
Electrify the machine again and turn it
on in the Cool state with the remote
controller. check whether motor can
run
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.
NO Reinsert the terminals
Measure the voltage between 1 and 3 of the terminal of
fan motor on the mainboard about DC310V, Measure
Yes
the voltage between 3 and 4 of the terminal about
DC15V. Measure the voltage between 5 and 3 of the
terminal about 1-6v.
Yes
Yes
33
NO
Is it normal?
N0
The mainboard of the outdoor unit is
damaged and needs replacing
Domestic air conditioner
Service diagnosis