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ErrorLib — Industrial Fault Code Library

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403

FIVE-MINUTE FULL FIELD

Otis · DSD 412 Elevator System

What does 403 mean?

This fault indicates that the Drive and Field Enable control circuit at terminal TB1-9 remained active for five minutes without the drive commencing operation. This condition can lead to burnout of the motor field winding.

Common Causes

  • Issue with the car controller relay logic, incorrectly keeping the Drive and Field Enable active without a start command.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the car controller relay logic to ensure that the Drive and Field Enable signal at TB1-9 is not continuously active for prolonged periods without the drive being started.

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

Related Faults

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