Ipm Protection - Haier AS24GS1ERA Service Manual

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?
Replace indoor fan motor

7.3.3 IPM protection

AS24GS1/2ERA 1U24GS1ERA-SM
NO
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
v o l t a g e D C 3 1 0 V
Yes
Is motor control power
voltageDC15Vgenerat
Is rotation number
commamd voltage
DC1 6V
No
Replace indoor unit
PCB
66
Service Diagnosis
NO
Replace indoor unit
PCB
NO
Replace indoor
Yes
unit PCB
Yes
Replace fan motor
Domestic Air Conditioner