97

OVERSPEED FAULT

Otis · DSD 412 Elevator System

What does 97 mean?

The motor speed has exceeded the trip level set in parameter #12, as measured by the encoder. Parameter #12 defines a percentage of the motor speed value set in parameter #11.

Common Causes

  • Incorrect setting of parameters #10, #11, or #12.
  • Poor speed regulator tuning.
  • Velocity reference set above rated speed.
  • Intermittent velocity encoder operation.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check parameters #10, #11, and #12 for correct settings.

  2. 2

    Check speed regulator tuning parameters #40, #41, and #42.

  3. 3

    Verify the velocity reference is not set above the motor's rated speed.

  4. 4

    Inspect the velocity encoder for intermittent operation.

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Verified technical data. Last updated: March 2026

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Source: Otis DSD 412 Elevator System