Indoor Ac Fan Motor Malfunction - Haier AS09GS1ERA Service Manual

7.4.2 Indoor AC fan motor malfunction

Indoor Display
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
Whether terminal CN8 and CN9 on
indoor PCB well inserted or not?
Electrify the machine again and turn it on in the
cooling mode, Measure whether there is voltage
60VAC-115VAC between the red wire and the black
wire of Terminal CN9 on the indoor PCB
Check whether motor can run when turn on the unit
When fan motor is running Measure whether there is
voltage pulse between the middle wire and the black
side wire of Terminal CN8 on the indoor PCB.
The indoor PCB is damaged and need replace
E14
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
Operation stops due to fan motor wiring disconnection
Operation stops due to wiring disconnection between PCB and indoor motor
Detection error due to faulty indoor PCB
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
YES
YES
YES
YES
NO
Pull out and reinsert the terminal.
No
The indoor PCB is damaged and need
NO
The indoor motor is damaged and need
NO
replace
The motor of the indoor unit is damaged
NO
and need replace
4
Service diagnosis
replace
Domestic air conditioner