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ErrorLib — Industrial Fault Code Library

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F12

HW OverCurrent

Allen-Bradley · PowerFlex 4 Adjustable Frequency

What does F12 mean?

A hardware-level overcurrent condition has been detected, indicating an immediate excessive current draw. This could stem from incorrect programming, a severe motor overload, improper DC boost settings, or excessively high DC brake voltage.

Common Causes

  • Excessive current drawn by motor exceeding drive limits.
  • Short circuit in motor windings or power cable.
  • Mechanical overload causing increased motor torque demand.
  • Incorrect motor parameter configuration (e.g., P0-11, P0-12).

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify motor load requirements are within the drive's continuous and peak current ratings.

  2. 2

    Check parameter A084 [Start Boost] settings; ensure it is not excessively high, especially for variable torque applications.

  3. 3

    Review parameter A081 [DC Brake Level] setting; ensure it is not configured for a value too high (max DriveAmps * 1.8).

  4. 4

    Inspect the motor and output wiring between the drive and motor for any short circuits or insulation damage.

Browse all codes in this manual (24)
Verified technical data. Last updated: April 2026

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Source: Allen-Bradley PowerFlex 4 Adjustable Frequency
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