Run Command Fault

What does EF mean?

This fault indicates an issue with the run command or a conflict in the command source (e.g., local/remote, digital input, serial). It prevents the inverter from starting or continuing operation. This can happen if the run command is unexpectedly lost, or if there's a discrepancy in how the inverter is commanded to run.

Complete Troubleshooting Guide

1. 1

   Verify the source of the run command (e.g., digital input, serial communication, operator panel) is active and stable.

2. 2

   Check the wiring for the digital input run command for continuity and proper voltage levels.

3. 3

   Review inverter parameters related to run command source selection (e.g., H1 settings, A1-03) and ensure consistency.

4. 4

   If using serial communication, verify the communication link and command structure.

5. 5

   Test the run/stop buttons on the digital operator to rule out operator panel issues.