Haier AP482AKEAA Service Manual page 39

13) Fault in indoor fan motor
Replace fuse
when there is no
short-circuit
Replace PCB
Is output voltage good
when energized? Does fan
motor run properly?
yes
Reconnect
no
Replace motor
Commercial Air Conditioner
confirm the malfunction
according to the fault code list
Is indoor status
indication good?
no
Is power supply good?
yes
no
Is fuse in good condition?
yes
yes
Is there any other
broken component?
no
check any other
reasons
no
Is it a PG motor? As in
AS and AF indoor units
yes
yes
Is there any poor
connection?
no
Is there DC voltage
feedback from motor
during running?
yes
Signal detecting circuit has
a problem. Replace PCB
Model: AP*****EAA AU*****EAA
yes
Is output voltage of
fan motor good?
yes
Is fan capacitor
in good
condition?
yes
Is fan motor winding
resistor normal?
yes
Wrong fault code. Check
other possible causes. E.g.
motor is stuck
No. It's split winding type motor
no
Is front-end voltage of
thyristor good?
no
Supply circuit has a
problem. Replace PCB
Is front-end voltage
of fan speed relay
good?
yes
Is voltage of fan speed
relay coil 12VDC?
yes
Fan speed relay is
broken, replace PCB
39
no
no
Replace fan
capacitor
no
Replace fan
motor
yes Thyristor or control
circuit has a problem.
Replace PCB
no Supply circuit has a
problem. Replace PCB
Controller chip has a
no
problem. Replace PCB