Service Diagnosis
36
11.4.2 EEPROM abnormal
Indoor Display E4: indoor EEPROM error
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
Faulty EEPROM data
Causes
Faulty EEPROM
Faulty PCB
Troubleshooting * Caution Be sure to turn off power switch before connect or disconnect connector, or parts
damage may be occurred.
Replace the indoor or outdoor mainboard
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