Haier AB122ACERA Service Manual - Page 59

Commercial Air Conditioner Model: AU122AEERA AB122ACERA AC122ACERA AD122ALERA 6) Outdoor high pressure protection Alarm condition: When compressor running, high pressure is over 4.5 MPa for 30 seconds continously outdoor failure indicator indicate high pressure failure check if the refrigerant is too much yes or less by the pressure gauge adjust refrigerant no check if the piping is blocked yes adjust piping no yes if high pressure switch is normal 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. outdoor indicator shows power faliure check if the wiring between indoor and outdoor is correct yes no adjust wiring no check if power supply is normal yes Replace the outdoor PCB adjust power supply as 50HZ，220-230VAC 8) EEPROM failure(01110), Compressor parameter error(10010) Alarm condition: EEPROM is fault or data is missing outdoor indicator shows the above failures no check if EEPROM welded points on outdoor PCB is in good condition yes adjust EEPROM welded point EEPROM data is missing, replace PCB 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 outdoor indicator shows the above failures when compressor starting up, unit stops abnormally and can not start up normally yes replace the outdoor module 59