Haier H2SM-(9+12)HEK03/R2 Service Manual page 57

7.4.6 The indoor EEPROM Abnormality
Indoor Display
Method of Malfunction
Detection
Malfunction Decision
Conditions
Supposed Causes
* Caution Be sure to turn off power switch before connect or disconnect connector, or parts damage may
be occurred.
H2SM-(9+12)HEK03/R2
E4
The Data detected by the EEPROM are used to determine MCU
When the Data of EEPROM is error or the EEPROM is damaged
Faulty EEPROM data
Faulty EEPROM
Faulty PCB
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Service Diagnosis
Domestic Air Conditioner