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ErrorLib — Industrial Fault Code Library

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F917

REVERSE ARM. V. FEEDBACK

Otis · DSD 412 Elevator System

What does F917 mean?

This fault is detected by the PCU Diagnostics function (Function #998) and indicates that the Armature Feedback wires are either reversed or not connected at all.

Common Causes

  • Armature Feedback wires are incorrectly connected in reverse polarity.
  • Armature Feedback wires are not connected to the drive.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Remove power from the drive.

  2. 2

    Inspect the Armature Feedback wires and reverse them if connected incorrectly.

  3. 3

    Verify that the Armature Feedback wires are securely connected.

  4. 4

    Repeat the PCU Diagnostics function to confirm the issue is resolved.

Browse all codes in this manual (57)
Verified technical data. Last updated: April 2026

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Source: Otis DSD 412 Elevator System
Open Manual (Page 43)Search more codes in this manual