Tamper Bosch — Fire Zone Fault / Open Circuit
At a glance
- Severity
- FAULT STOP
- Domain
- FIRE_DETECTION
- Reference standard
- EN 54-2 / UNI 9795
What it means
The panel reports a zone fault or open circuit: the loop or conventional line is interrupted. A detector removed from its base without isolation, a missing or wrong-value end-of-line resistor, loose or oxidized terminals are the main suspects.
Probable causes
- Loop or zone cable interrupted
- Detector removed from base without prior disablement
- End-of-line resistor missing or wrong value
- Loose or oxidized terminal on the panel
Full guided diagnosis in the app
The diagnostic tree for this fault has 7 guided steps with measurements, checks and resolutions. You'll find it in BASIQ, one of the five IndexOS apps: free, works offline.
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The same fault on other brands
More Bosch codes
- Batteria bassa — Fire Panel Battery Low
- Guasto rivelatore (sporco) — Fire Detector Dirty / Maintenance Required
- ALARM — False Fire Alarm
- Batteria bassa — Battery Low / Battery Failure
- DOOR NOT CLOSED — Release with Poor Room Integrity
- EXTRACTION FAULT — Smoke Damper / Extraction Failure
- MULTI ZONE ALARM — Fire Spread via Cable Openings
- READER FAULT — Access Control Offline