17

Over-speed Protection in Riding Direction

Kone · Frequency Inverter

What does 17 mean?

This error indicates that the motor speed has exceeded a safe limit while traveling in the intended 'riding' or forward direction. This is a critical safety fault, often triggered by a loss of speed control, an external force causing acceleration, or an incorrect over-speed threshold.

Common Causes

  • Loss of speed control by the drive, potentially due to feedback error or control loop instability.
  • External forces causing the motor to accelerate beyond its commanded speed.
  • Incorrect over-speed protection threshold setting in the drive parameters.
  • Malfunctioning speed feedback device providing inaccurate speed readings.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Verify the accuracy and stability of the speed feedback signal from the encoder or other speed sensing device.

  2. 2

    Check the motor load and ensure that no external forces are causing uncontrolled acceleration beyond commanded speed.

  3. 3

    Review and adjust the over-speed protection threshold parameter in the drive to an appropriate and safe limit.

  4. 4

    Inspect the drive's speed control loop parameters for any signs of instability or incorrect tuning.

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Verified technical data. Last updated: March 2026

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