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Seivice diagnosis
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Domestic air conditioner
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11.4.3 Indoor AC fan motor malfunction
Indoor Display
E14
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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
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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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