Haier 2HUM18HC03/R2 - Page 55

2HUM18HC03/R2(DB)-SM Wiring diagrams
52
Domestic air conditioner
or else parts damage may be occurred.
Check whether terminals
on indoor
p
cb is well ?
Electrify the machine again and turn it on in the cooling operation,
Measure voltage between the positions 1and 3 of Terminal CN5
on the indoor PCB
the voltage is about 90-220vac
check whether motor can run
when turn on the unit
the indoor motor is damaged and need replace
Yes
12
12
<HV
Measure whether there is voltage pulse(0-5VDC)
between the positions middle wire and black wire
of Terminal CN2 on the indoor PCB
12
the indoor pcb is damaged and need replace

Pull out the terminals on the indoor
mainboard and reinsert them.
1R
<HV
Is it ok?
<HV