Haier AC122ACERA [362/408] Troubleshooting

Haier AD722AHEAA [362/408] Troubleshooting
if high pressure switch is normal
check if the refrigerant is too much
or less by the pressure gauge
no
no
yes
outdoor failure indicator indicate high pressure failure
check if the wiring between
indoor and outdoor is correct
no
outdoor indicator shows power faliure
check if power supply is normal
yes
no
adjust power supply as
50HZ
ˈ
220-230VAC
EEPROM data is missing, replace PCB
check if EEPROM welded points on
outdoor PCB is in good condition
outdoor indicator shows the above failures
yes
no
adjust EEPROM
welded point
outdoor indicator shows the above failures
replace the outdoor module
when compressor starting up, unit stops
abnormally and can not start up normally
yes
6) Outdoor high pressure protection
Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30 seconds continously
check if the piping is blocked
yes
adjust refrigerant
adjust piping
yes
replace sensor
7) Outdoor power supply is abnormal
Alarm condition: if power supply is not 50Hz as standard, which will affect the normal communication and
cause air conditioner bad operation.
adjust wiring
8) EEPROM failure(01110), Compressor parameter error(10010)
Alarm condition: EEPROM is fault or data is missing
9) Circuit error detected by current(10011), Module error(01101), Module PWM select circuit error(01011)
Alarm condition: when compressor is running, the unit will be abnormal or stop
Replace the outdoor PCB
yes
Troubleshooting
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