F114

uC Failure

Allen-Bradley · PowerFlex 520-series Adjustable Frequency AC Drive

What does F114 mean?

A critical microprocessor failure has occurred within the drive's control module. This indicates a severe internal hardware or firmware issue with the central processing unit, which can lead to unpredictable behavior, persistent faults, or complete operational failure.

Complete Troubleshooting Guide

  1. 1

    Cycle power to the drive to attempt a reset of the microprocessor and internal systems.

  2. 2

    Verify that the drive's grounding requirements are met, including proper earth ground connections, as poor grounding can cause electrical noise leading to processor errors. Refer to the manual's General Grounding Requirements.

  3. 3

    If the fault cannot be cleared after cycling power and verifying grounding, replace the control module as the microprocessor is a core, non-field-serviceable component within it.