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ErrorLib — Industrial Fault Code Library

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400

MOTOR OVERLOAD FAULT

Otis · DSD 412 DC Elevator Drive

What does 400 mean?

The drive has delivered excessive motor amps for a significant period of time. This fault does not automatically shut down the drive, but is annunciated via the ALARM relay output K2.

Common Causes

  • Improper setup of parameters #83 and #84.
  • Dragging elevator brake.
  • Weakened motor field.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Refer to parameters #83 and #84 for proper setup and verification.

  2. 2

    Check for a dragging elevator brake.

  3. 3

    Check the motor field strength.

Browse all codes in this manual (48)
Verified technical data. Last updated: April 2026

Related Faults

117/118SERIAL COMMUNICATION FAULT401EXCESSIVE FIELD CURRENT402LOOP CONTACTOR FAULT
Source: Otis DSD 412 DC Elevator Drive
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