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ErrorLib — Industrial Fault Code Library

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414

SOFTWARE COMPATABILITY FAULT

Otis · DSD 412 DC Elevator Drive

What does 414 mean?

The PCU (U13, U14) version and/or revision is incompatible with the DCU (U39, U40) installed in the drive. This typically indicates a mismatch in EPROM versions.

Common Causes

  • Incompatible PCU (U13, U14) software/revision with DCU (U39, U40).
  • Incorrect ROMs (U13, U14, U39, U40) installed in the drive.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check and/or replace U13, U14, U39, U40 (EPROM’s) to ensure compatibility.

  2. 2

    Replace Drive Control PCB A1 if necessary.

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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