Haier HSU24VCK Service Manual page 33

Turn off power supply and
rotate fan by hand
Does fan rotate
smoothly?
Yes
Turn power ON and operate fan
Does it rotate?
Yes
Stop fan motor
Is rotation number
command pulse
generated?
Yes
Replace indoor
HSU24VCK-SM
NO
Replace fan motor
No
Turn off power supply and disconnect fan
motor connector,then turn power ON
Check output of fan motor connector
Is motor power voltage
DC310V gengerated?
Is motor control power
voltageDC15Vgenerat
Is rotation number
commamd voltage
DC1 6V generated?
No
Replace indoor unit PCB
fan motor
31
Codes and Description
NO
Yes
NO
Yes
Yes
No
DomesticAirConditioner
Replace indoor
unit PCB
Replace indoor
unit PCB
Replace fan
motor