Cup Sensor

Cup Sensor Malfunction

Otis · 400 Elevator

What does Cup Sensor mean?

Indicates that the cup product detect transmitter, receiver, or the oscillator on the cup board has malfunctioned. This prevents accurate detection of cups and can halt vend operations, leading to product delivery issues.

Common Causes

  • Faulty cup transmitter.
  • Faulty cup receiver.
  • Faulty oscillator on the cup board.
  • Loss of continuity or fault in the cup transmitter or receiver harnesses.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check continuity in the cup transmitter and cup receiver harnesses.

  2. 2

    Replace the transmitter and/or receiver harness if found faulty.

  3. 3

    If harnesses are not faulty, replace the cup board, transmitter board, and receiver board.

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Verified technical data. Last updated: March 2026

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