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E4

E4 – Packet addressing error

Siemens · IQ-400 Access Control Systems

What does E4 mean?

The Siemens IQ-400 panel has encountered an error related to packet addressing. This indicates a general failure within the IQ-400 system.

Common Causes

  • Internal IQ-400 system failure.
  • Potential software or firmware issue.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Remove the battery from the IQ-400 for 5 minutes, then reinsert it and restart the panel.

  2. 2

    Verify that the IQ-400 ID number is correctly set via the SW1 switches and matches your PC configuration.

  3. 3

    If the error persists, contact your PCSC representative for service.

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 82)Search more codes in this manual