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ErrorLib — Industrial Fault Code Library

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400

MOTOR OVERLOAD FAULT

Otis · DSD 412 Elevator System

What does 400 mean?

This fault indicates that the DSD 412 drive has supplied excessive motor current for a significant duration. This condition does not automatically shut down the drive but is signaled via the ALARM relay output K2.

Common Causes

  • Dragging elevator brake causing increased mechanical load.
  • Weakened motor field, leading to higher armature current for a given torque.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to parameters #83 and #84 for proper drive setup and configuration.

  2. 2

    Inspect the elevator brake for any signs of dragging or mechanical interference.

  3. 3

    Assess the motor field strength for any indication of a weakened field.

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

Related Faults

117/118SERIAL COMMUNICATION FAULT401EXCESSIVE FIELD CURRENT402LOOP CONTACTOR FAULT
Source: Otis DSD 412 Elevator System
Open Manual (Page 85)Search more codes in this manual