Haier AS09GS1ERA - Page 52

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Service diagnosis
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Domestic air conditioner
Turn off power supply and rotate fan
by hand
Dosefanrotate
smoothly?
Turn power on and operate the fan
Does it rotate?
Turn off power supply and disconnect fan
motor connector, then turn power on
NO
Replace fan motor
Check output of fan motor connector
NO
Replace indoor PCB
YES
YES
NO
Replace indoor PCB
YES
Is motor control power voltage
DC15V generated?
Is motor power voltage
DC310V generated?
Is rotation number command
voltage DC1~6V generated?
YES
Replace fan motor
NO
Replace indoor PCB
Stop fan motor
Is rotation number command
pulse generated?
Replace indoor fan
motor and PCB
YES