System Configuration Fault

What does F66 mean?

This Automatic Fault indicates incorrect multi-unit configuration settings, such as more than one primary unit or non-unique device numbers in a multi-inverter setup. This prevents proper system synchronization and operation.

Complete Troubleshooting Guide

1. 1

   Ensure only one unit is configured as the primary.

2. 2

   For three-phase installations, make sure that only one unit on each phase is configured as the primary.

3. 3

   Ensure each unit has a unique Device Number.

4. 4

   Verify Inverter Mode and Connections have been configured correctly.