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ErrorLib — Industrial Fault Code Library

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Delivery Port Sense

Delivery Port Sensor Error

Otis · 400 Elevator

What does Delivery Port Sense mean?

Indicates that the DMC is reporting a port sense error. This can be caused by obstructions blocking the port's LEDs or a malfunction of the port's detection components, preventing delivery detection.

Common Causes

  • Obstructions blocking the LEDs in the delivery port.
  • Faulty connections between the port transmitter and receiver boards.
  • Defective port detection cable.
  • Faulty port receiver or transmitter boards.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check to make sure there are no obstructions blocking the LEDs in the delivery port.

  2. 2

    Remove any items blocking the port sensors.

  3. 3

    Check the connections between the port transmitter and receiver boards.

  4. 4

    Replace the port detection cable if connections were found to be correct.

  5. 5

    If replacing the cable does not correct the problem, replace the port receiver and transmitter boards.

Browse all codes in this manual (41)
Verified technical data. Last updated: April 2026

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Source: Otis 400 Elevator
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