FWD/REV Run Command Input Error

What does EF mean?

This fault occurs when both a forward and a reverse run command are simultaneously active for an extended period (longer than 0.5 seconds). This indicates a conflict in the control logic or wiring, leading to the motor ramping to a stop to prevent damage from conflicting directional commands. It is a critical safety interlock issue.

Complete Troubleshooting Guide

1. 1

   Examine the control circuit logic and wiring for the forward and reverse run commands.

2. 2

   Correct the sequence or implement proper electrical/software interlocks to ensure only one directional command is active at a time.