What does E0 mean?

This error signifies a problem with the EEPROM (memory chip) within the MMDB indoor unit. This chip stores important operational settings.

• Corrupted data in the EEPROM
• Hardware failure of the EEPROM chip
• Power fluctuations during operation

Click steps to track your progress.

1. 1

   Ensure the unit has a steady power supply.

2. 2

   Try a full power reset: switch off the circuit breaker for 30 seconds, then switch it back on.

3. 3

   If the error message persists, the control board containing the EEPROM may need replacement.