Inlet Sense

Coin Inlet Sensor Blocked

Otis · 400 Elevator

What does Inlet Sense mean?

Indicates the machine’s coin inlet sensor has been blocked for more than a minute. This is an optional component not installed on all venders and prevents coin insertion into the system.

Common Causes

  • Coin inlet sensor is physically blocked for an extended period.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the coin inlet mechanism and sensor area for any visible foreign objects, debris, or physical obstructions.

  2. 2

    Verify that any associated mechanical parts, such as coin rejection levers or gates, move freely and are not jammed.

  3. 3

    Check the electrical cabling and connections of the coin inlet sensor to its control module for looseness, damage, or improper seating.

  4. 4

    Consult the system's electrical schematics and documentation to identify the sensor type and location, and verify if it's configurable or can be disabled if it's an optional component.

  5. 5

    Measure the output signal of the coin inlet sensor (if accessible and non-destructive) to confirm its state when clear versus blocked, comparing against expected values in the documentation.

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Verified technical data. Last updated: March 2026

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