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Door Sense LED ON

Door Sense LED ON – Circuit in alarm condition

Siemens · IQ-400 Access Control Systems

What does Door Sense LED ON mean?

A solid ON Door Sense LED indicates that the associated door circuit is in an alarm condition state. This typically means the door is open, or a tamper event has occurred.

Common Causes

  • Door is open or not fully closed.
  • Door contact is faulty, dislodged, or misaligned.
  • Tamper detection on the circuit.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Check the physical state of the door to ensure it is closed and secure.

  2. 2

    Inspect the door contacts for proper installation, alignment, and any signs of damage.

  3. 3

    Verify that required resistors are correctly installed at the door contacts as per installation instructions.

Browse all codes in this manual (21)
Verified technical data. Last updated: April 2026

Related Faults

Door Sense LED Blinks 1 time every 2 secondsDoor Sense LED Blinks once every 2 seconds – Fault: Open circuitDoor Sense LED Blinks 1 time/secondDoor Sense LED Blinks 1 time/second – Fault: Short circuitDoor Sense LED Blinks 4 times/secondDoor Sense LED Blinks 4 times/second – Circuit NOT calibrated
Source: Siemens IQ-400 Access Control Systems
Open Manual (Page 107)Search more codes in this manual