38MGRBQ: Service Manual
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45
DIAGNOSIS AND SOLUTION (CONT)
E0/ EC 51 (Outdoor unit EEPROM parameter error) diagnosis and solution
Troubleshooting
EEPROM: a type of memory. The contents can be erased and reprogrammed using a pulsed voltage (see figure 39).
Fig. 39 — EEPROM
ERROR CODE
E0/ EC 51
MALFUNCTION DECISION
CONDITIONS
PCB main chip does not receive feedback from EEPROM chip
SUPPOSED CAUSES
Installation mistake
Faulty PCB
Yes
Power off, then restart the
unit 3 minutes later
Outdoor EEPROM malfunction
Replace the outdoor main PCB
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