Seivice diagnosis
Domestic air conditioner
11.4.3 Indoor AC fan motor malfunction
Indoor Display
E14
Check whether terminals
on indoor pcb 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
The fan speed detected by the Hall IC during fan motor running which is used to
determine the fan motor operating
When there is no fan speed feedback signal within 2 minutes
Ŷ Operation halt due to breaking of wire inside the fan motor.
Ŷ Fan motor overheat protection
Ŷ Operation halt due to breaking of the fan motor lead wires
Ŷ Detection error due to faulty indoor unit PCB
* Caution
Be sure to turn off power switch before connect or disconnect connector, or else parts
damage may be caused
Method of
malfunction detection
Malfunction detection
conditions
Troubleshooting
Supposed causes
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