ZONE ISOLATED Honeywell — 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.
Printable sheet + Honeywell updates
Leave your email: get the link to the printable Honeywell error-code sheet and a heads-up when we add new codes and guides.
Double opt-in, zero spam, one-click unsubscribe.
The same fault on other brands
More Honeywell codes
- ABORT ACTIVE — Suppression Release Failure
- ALARM VERIFY — False Fire Alarm
- SMOKE MIGRATION — Fire Spread via Cable Openings
- ALARM ROUTING FAULT — Alarms Not Notified
- BAT FAIL — Battery Low / Battery Failure
- BAT FAIL — Fire Panel Battery Low
- COMM FAIL — Communication Lost / Controller Offline
- COMM FAIL — Reader Offline / Reader Not Communicating