Eeprom Abnormal; Indoor Ac Fan Motor Malfunction - Haier 2HUM18HC03/R2 Service Manual

7.3.2 EEPROM abnormal

Indoor Display E4: indoor EEPROM error
Indoor display F12: Outdoor EEPROM error ;Outdoor LED1 flash 1 times
Method of The Data detected by the EEPROM are used to determine MCU
Malfunction
Detection
Malfunction when the data of EEPROM is error or the EEPROM is damaged
Decision
Conditions
Supposed
Causes
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
may be occurred.

7.3.3 Indoor AC fan motor malfunction

Indoor Display E14
Method of
The rotation speed detected by the Hall IC during fan motor operation is used to
Malfunction
abnormal fan motor operation
Detection
Malfunction when the detected rotation feedback singal don't receiced in 2 minutes
Decision
Conditions
Supposed
Causes
Operation halt due to breaking of the fan motor lead wires
Detection error due to faulty indoor unit PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector,
2HUM18HC03/R2(DB)-SM
Faulty EEPROM data
Faulty EEPROM
Faulty PCB
Replace the indoor or outdoor mainboard
Operation halt due to breaking of wire inside the fan motor .
Fan motor overheat protection
51
Wiring diagrams
or parts damage
determine
Domestic air conditioner