117/118

SERIAL COMMUNICATION FAULT

Otis · DSD 412 Elevator System

What does 117/118 mean?

Code 117 indicates serial communication did not start within 10 seconds after drive reset or power-up. Code 118 indicates a valid serial communication message was not received for more than 150 ms.

Common Causes

  • Host not connected or not sending valid messages.
  • Electrical grounding noise interference.
  • Parameter #110 set to selection 3 when serial communication is not being used.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Ensure the host is connected and sending valid messages.

  2. 2

    Identify and correct electrical grounding noise interference problems.

  3. 3

    If serial communication is not being used, verify parameter #110 is NOT set to selection 3.

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

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Source: Otis DSD 412 Elevator System