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403

FIVE-MINUTE FULL FIELD

Otis · DSD 412 DC Elevator Drive

What does 403 mean?

The Drive and Field Enable control circuit at TB1-9 was active for 5 minutes without the drive starting. This condition can cause motor field burnout.

Common Causes

  • Drive and Field Enable control circuit at TB1-9 active for 5 minutes without a drive start command.
  • Issues with car controller relay logic preventing a drive start.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the car controller relay logic to ensure proper drive start sequencing.

  2. 2

    Verify the state of the Drive and Field Enable control circuit at TB1-9.

  3. 3

    Ensure the drive is commanded to start within 5 minutes when Drive and Field Enable is active, or disable the enable signal if the drive is not intended to start.

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

Related Faults

117/118SERIAL COMMUNICATION FAULT400MOTOR OVERLOAD FAULT401EXCESSIVE FIELD CURRENT
Source: Otis DSD 412 DC Elevator Drive
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