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ErrorLib — Industrial Fault Code Library

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Inlet Blocked

Coin Inlet Blocked

Otis · 400 Elevator

What does Inlet Blocked mean?

Indicates two coins were sensed at the inlet sensor but failed to make it to the changer within 10 seconds. This suggests a blockage or malfunction in the coin path between the inlet and the changer.

Common Causes

  • Obstruction in the coin path after the inlet sensor, preventing coins from reaching the changer.
  • Malfunction of the coin routing mechanism.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Inspect the coin inlet and the coin path between the inlet and the changer for any foreign objects, debris, or mechanical obstructions.

  2. 2

    Verify the functionality of the inlet sensor and any subsequent coin path sensors by testing with known coins or observing diagnostic feedback.

  3. 3

    Inspect the coin path for signs of wear, misalignment, or damage to guides, gates, or other moving parts that could impede coin travel.

  4. 4

    Check all electrical connections and wiring between the coin inlet system and the coin changer unit for looseness, corrosion, or damage.

  5. 5

    Clean the coin path thoroughly to ensure smooth coin travel and remove any build-up that could increase friction or cause intermittent blockages.

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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