Haier HSU09VHJ - Page 67

HSU09VHJ˄DB˅-SM Service Diagnosis
Domestic Air Conditioner
65
Does fan rotate
smoothly?
NO
Yes
Turn power ON and operate fan
Does it
rotate?
NO
Yes
Turn off power supply and
disconnect fan motor
connector
,
then turn
p
ower ON
Check output of fan motor connector
Is motor power voltage
DC310V
g
en
g
erated?
NO
Yes
Stop fan motor
Check output of fan
motor connector
Is rotation number
command pulse
g
enerated?
Is motor control power
voltageDC15Vgenerated?
Is rotation number
commamd voltage
DC16V
Yes
Yes
No
No
Turn off power
supply and rotate fan
by hand
Replace indoor unit PCB
Replace fan
motor
Replace indoor unit PCB
Replace indoor uni
t
PCB
Replace the motor
NO
Replace indoor unit PCB