Backup Power Restart Attempts Exceeded

What does 1177 mean?

Service message 1177 is triggered when the inverter has reached its maximum configured number of automated restart attempts in backup power mode. This indicates that the system failed to re-establish backup power operation after multiple shutdowns.

• Repeated failures to restart backup power mode due to persistent issues.
• The configured 'Backup power restart attempts' limit has been met.
• Underlying issues preventing stable backup power operation (e.g., undervoltage, overvoltage, short circuit, etc.).

Click steps to track your progress.

1. 1

   Manually acknowledge service message 1177 on the inverter's user interface to clear the fault.

2. 2

   Check the 'Backup power restart attempts' parameter (1-10) to understand the configured limit.

3. 3

   Investigate other potential backup power related faults such as 'Backup power undervoltage protection time U<', 'Backup power surge protec- tion time U>', or 'Backup power short circuit switch-off time' that might be causing repeated shutdowns.