F33

Auto Rstrt Tries

Allen-Bradley · PowerFlex 4M Adjustable Frequency AC Drive

What does F33 mean?

The drive has attempted to automatically reset a fault and restart the programmed number of times (set by A451) without success. This indicates a persistent underlying issue that the auto-restart feature cannot resolve, preventing the drive from resuming operation.

Complete Troubleshooting Guide

  1. 1

    Identify and resolve the root cause of the original fault that triggered the auto-restart attempts.

  2. 2

    Manually clear the F33 fault using the keypad, a digital input configured for fault clear (t201/t202 option 7), or parameter A450 [Fault Clear].

Source: Allen-Bradley Manual