Ipm Protection - Haier HSU09VHJ Service Manual

Does fan rotate
smoothly?
Turn power ON and operate fan
Does it rotate?
Yes
Stop fan motor
Is rotation number
command pulse
generated?
Replace indoor fan motor

7. .3 IPM protection

LED1 flash 2 times:
HSU09VHJ DB -SM
NO
Yes
No
Y
No
PCB
Replace fan motor
Turn off power supply and disconnect fan
motor connector,then turn power ON
Check output of fan motor connector
I s m o t o r p o w e r
voltage DC310V
Is motor control power
voltageDC15Vgenerat
Is rotation number
commamd voltage
DC1 6V
No
Replace indoor unit
PCB
53
Service Diagnosis
NO
Replace indoor unit
PCB
Yes
NO
Replace indoor
Yes
unit PCB
Yes
Replace fan motor
Domestic Air Conditioner