AC Breaker Trip

What does F77 mean?

This Automatic Fault indicates that a primary or secondary AC1 or AC2 breaker has tripped in a multi-unit installation, likely due to an overload condition. The inverter will attempt to auto-clear the fault once the breaker is closed.

Complete Troubleshooting Guide

1. 1

   Check if there is any overload condition.

2. 2

   If the fault was triggered by secondary unit, close the breaker.

3. 3

   If the fault was triggered by primary unit, close the breaker.