Haier J Series Service Manual page 39

1 .4.3 Indoor DC fan motor fault
Indoor display E14
Method of
DC fan motor is detected by checking the fan running condition and so on
Malfunction
Detection
Malfunction
when the detected rotation feedback signal don't received in 2 minutes
Decision
Conditions
Supposed
Causes
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage
may be occurred.
Turn off power switch,and pull out the fan motor.
Measure the resistanc es between bal c k l i ne ( 0V) and whi te
line(15V) ,balck line (0V)and red line(310V) of indoor fan motor .
The resistances range is
DC fan motor protection dues to the DC fan motor faulty
DC fan motor protection dues to faulty PCB
Check whether
terminals on indoor
pcb is well
YES
between 30KΩ with
2MΩ
NO
The indoor fan
motor is damaged
and need replace
NO
Pull out the terminals on
the indoor mainboard and
reinsert them.
the indoor pcb is damaged
YES
and need replace
37
Service diagnosis
Domestic air conditioner