910

BLOWN FUSE FAULT

Otis · DSD 412 Elevator System

What does 910 mean?

One or more of the three AC line fuses is open. This condition is checked on power-up and can be confirmed upon request through the PCU F#998 PCU Diagnostics function, via measurements on the Armature Interface PCB, A2.

Common Causes

  • One or more AC input fuses are blown.
  • Power wiring problem.
  • Faulty DSPR power relay.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check all AC input fuses for open circuits and replace any blown ones.

  2. 2

    Inspect power wiring for problems.

  3. 3

    Check for a faulty DSPR power relay.

  4. 4

    Use the PCU F#998 PCU Diagnostics function to confirm the fault.

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Verified technical data. Last updated: March 2026

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Source: Otis DSD 412 Elevator System