Haier MRV S II - High;Low Pressure Sensor Failure; Outdoor EEPROM Failure

6161
Troubleshooting
If sensor terminal is xed well
If voltage between red terminal
and black terminal is 5V when
testing pressure sensor by
multimeter
If voltage between white terminal and black
terminal is 0.5V~3.5V when testing pressure
sensor by multimeter
Replace connecting board
Reconnect
Reconnect
Replace PCB
Replace pressure sensor
No
No
No
No
Yes
Yes
Yes
Yes
If the EEPROM is xed well
Replace EEPROM
[28, 29] High/low pressure sensor failure
[33] Outdoor EEPROM failure