Power Supply Over Or Under Voltage Fault - Haier AS09GS1ERA Service Manual

7.4.10 Power Supply over or under voltage fault

Indoor display
Outdoor display:
Method of
malfunction
detection
Malfunction
detection
conditions
Supposed
causes
Troubleshooting
Check the power supply
module, Is it normal?
Change the outdoor PCB
F19
LED1 flash 6 times
An abnormal voltage rise or fall is detected by specified voltage checking
detection circuit
An voltage signal is feedback from the voltage detection circuit to the
microcomputer
Supply voltage not as specified
The IPM module is broken.
The outdoor PCB is broken.
Be sure to turn off power switch before connect or disconnect connector, or
else
parts damage may be caused
Is it rated value?
YES
Check the IPM
YES
NO
House power supply fault.
NO
Change the new one
Service diagnosis
Domestic air conditioner