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
Decision
Conditions
Supposed
DC fan motor protection dues to the DC fan motor faulty
Causes
DC fan motor protection dues to faulty PCB
Troubleshooting
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage
may be occurred.
Service diagnosis
Domestic air conditioner
37
when the detected rotation feedback signal don’t received in 2 minutes
Check whether
terminals on indoor
pcb is well
Pull out the terminals on
the indoor mainboard and
reinsert them.
Turn off power switch,and pull out the fan motor.
Measure the resistances 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
between 30KΩ with
2MΩ
The indoor fan
motor is damaged
and need replace
NO
YES
NO
YES
the indoor pcb is damaged
and need replace
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