Haier AC122ACERA [371/408] Troubleshooting

Haier AB422AEEAA [371/408] Troubleshooting
check if the piping is
blocked
check if the refrigerant is
too much or too less
outdoor failure indicator
flashes 5 times
no
yes
no
yes
adjust refrigerant
replace SPDU
module
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
flashes 8 times
check if the wiring between
indoor and outdoor is correct
no
outdoor indicator flashes 10 times
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 flashes 14 times
yes
no
adjust EEPROM
welded point
6) Outdoor SPDU/ISPM module over current protection
Alarm condition: When the module detect the current too high and over the limit value
adjust piping
7) Outdoor high pressure protection
Outdoor indicator flashes 8 times
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
8) 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
9) EEPROM is abnormal
Alarm condition: EEPROM is fault or data is missing.
Troubleshooting
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