HFB

High Feedback

Yaskawa · iQpump1000 AC Drive

What does HFB mean?

The feedback signal has risen above the level set in P1-11 (High Feedback Level) for the time set in P1-12 (High Feedback Level Fault Delay Time). This fault is effective only when P1-13 (High Feedback Selection) is set to 0 (Fault and digital output).

Common Causes

  • Feedback signal has risen above the threshold P1-11 for longer than the delay time P1-12.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Set the High Feedback fault characteristics using parameters P1-11 and P1-12.

  2. 2

    Control drive response to this condition using P1-13 (High Feedback Selection).

  3. 3

    Control auto-restart of this fault using L5-41 (High Feedback Fault Retry Selection).

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Verified technical data. Last updated: March 2026

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