DETECTOR FAULT Siemens — Detection Failure (No Alarm)
At a glance
- Severity
- E STOP
- Domain
- FIRE_SUPPRESSION_SYSTEM
- Reference standard
- UNI 9795
What it means
Detection misses an incipient fire (failed detector, blocked aspiration, isolated zone): the event grows to a late release or a full fire.
Probable causes
- Detector failed or isolated and never restored
- Aspiration sampling blocked (filters, pipes)
- Zone disabled after work and forgotten
- Unmonitored panel fault
Where to start
Check panel status: active faults, isolated zones, functional test of the suspect zone with a test device.
Full guided diagnosis in the app
The diagnostic tree for this fault has 3 guided steps with measurements, checks and resolutions. You'll find it in DataCIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More Siemens codes
- DAMPER FAULT — Smoke Damper / Extraction Failure
- FAN DAMPER FAULT — Release with Poor Room Integrity
- PRE-ALARM — False Fire Alarm
- RELEASE CIRCUIT FAULT — Suppression Release Failure
- 0xE900 / 0xE901 — IO-Link communication lost (device not responding)
- 6EP1333-4BA00 — Unstable PLC power supply — cyclic restarts
- 6ES7521-1BL00-0AB0 — Digital input module — input not reading (stuck at 0)
- 6ES7522-1BL01-0AB0 — Digital output module — output not activating