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ErrorLib — Industrial Fault Code Library

Disclaimer: ErrorLib is an independent technical reference tool. While we aim for accuracy, always verify with the manufacturer’s official service manuals before performing maintenance on industrial equipment. ErrorLib is not affiliated with the brands listed.

79

Excessive Load

Allen-Bradley · PowerFlex 700

What does 79 mean?

The motor did not come up to speed in the allotted time during an autotune procedure. This indicates the motor or connected load is preventing the autotune from completing successfully, potentially due to high friction or an oversized load.

Common Causes

  • Mechanical system connected to the drive is experiencing a high load.
  • Application demanding more torque than the motor can deliver.
  • Incorrect motor sizing for the application.
  • Faulty coupling or gearbox causing increased drag.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Uncouple the mechanical load from the motor.

  2. 2

    Repeat the Autotune procedure.

Browse all codes in this manual (49)
Verified technical data. Last updated: April 2026

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Source: Allen-Bradley PowerFlex 700
Open Manual (Page 85)Search more codes in this manual