CodeRegistry
Brands
  1. Home
  2. Siemens
  3. IQ-400 Access Control Systems
  4. E2
About·Privacy·Terms

CodeRegistry — Your global library for technical solutions.

For your safety: always follow the equipment manufacturer’s official manuals. CodeRegistry is an independent help site and is not affiliated with the brands listed here.

E2

E2 – RAM error detected

Siemens · IQ-400 Access Control Systems

What does E2 mean?

The Siemens IQ-400 system has detected an error within its Random Access Memory (RAM). This suggests a probable failure of the main printed circuit board (PCB) or an issue with a specific integrated circuit.

Common Causes

  • Probable PCB failure within the IQ-400.
  • The IC at U108 is not seated properly on the PCB.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Power cycle the IQ-400 panel by safely removing and reinserting the battery.

  2. 2

    Carefully verify that the IC at U108 is seated properly on the printed circuit board.

  3. 3

    If the error persists after checking the IC, 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