Premium PPA1207 - Power Supply and Motor Faults

1.Items to be checked
1 Whether input voltage is right or not
2 Whether the connection of AC power supply is right or not
3 Whether the output voltage of manostat isr ighto rn ot
2.Flow chart of malfunction diagnosis
7805(IC1)
4-2 Guide to malfunction diagnosis
4-2-1 No power supply (completely no work)-preliminary diagnosis
Check transformer whether is intact or not
Check DC voltage on PCB board
whether is intact or not
Check condition of power supply
line and condition end check fuse
Replace Ic2
Check PCB board
replace main PCB board
check connection status of compressor,
synchronous motor and fan motor
YES
NO
YES
NO
NO
Replace PCB
NO
YES
YES
Draw out power supply plug and about
five seconds later insert again
Whether buzzer sounds or not
Whether the indicator lamp LED and digital tube
light on or not
Whether is there signal transmittal indication
on remote controller or not
After press "ON/OFF" on remote controller,
whether air conditioner runs or not?
Normal
Refer to misfunction diagnosis
of remote controller
Whether the preliminary voltage applied
on transformer is normal or not
Whether the voltage of compressor, synchronous
motor and fan motor are normal or not
Whether Ic2 output voltage is normal or not
YES
YES
NO
YES
NO
YES
YES
NO
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