Haier HSU09VHJ - 7.3.3 IPM protection

HSU09VHJ˄DB˅-SM Service Diagnosis
Domestic Air Conditioner
53
7.3.3 IPM protection
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outdoor display LED1 flash 2 times: Indoor Display F1
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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 power ON
Check output of fan motor connector
Is motor power
volta
g
e DC310V
NO
Yes
Replace indoor uni
t
PCB
Replace fan motor
Stop fan motor
Is rotation number
command pulse
g
enerated?
Is motor control power
voltageDC15Vgenerat
Is rotation number
commamd voltage
D
C
1
6
V
NO
Yes
Yes
No
No
Y
Replace indoor uni
t
PCB
Replace fan motor
Replace indoo
r
unit PCB
Replace indoor fan motor
PCB