Haier H2SM-(9+12)HEK03/R2 Service Manual page 52

7.4.2 Indoor fan motor malfunction
Indoor Display
Method of Malfunction
Detection
Malfunction Decision
Conditions
Supposed Causes
W hether terminal CN7 and CN13
on indoor PCB well inserted or not?
Electrify the machine again and turn it on in the
cooling operation,
positions 1 (
Terminal CN7 on the indoor PCB
Check whether motor can run when
turn on the unit
When motor is running Measure
whether there is voltage pulse(0-5VDC) between
the
positions 2 (middle
The indoor pcb is damaged and need
replace
H2SM-(9+12)HEK03/R2
E14
The rotation speed detected by the Hall IC during fan motor
operation is used to determine abnormal fan motor operation
When the detected rotation feedback singal don't receiced in 2 minutes
Operation halt due to short circuit inside the fan motor winding.
Operation halt due to breaking of wire inside the fan motor.
Operation halt due to breaking of the fan motor lead wires.
Dedection error due to faulty indoor unit PCB.
NO
Measure voltage between the
red wire) black wire) of
and 5(
The voltage is about 90-200vac
YES
YES
wire)
and 3(
of Terminal CN13 on the indoor
YES
Pull out and reinsert the terminals
YES
The indoor pcb is damaged and
NO
need replace
The indoor motor is damaged and
NO
need replace
NO
black wire)
50
Service Diagnosis
The indoor motor is damaged
and need replace
Domestic Air Conditioner