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Lost Device

Loop device not communicating with the control panel

The panel has lost communication with a device on the detection loop.

What this code means

The panel has lost communication with a device on the detection loop.

Possible causes

  • Disconnected device
  • Loose or damaged loop wiring
  • Device failure
  • Loop communication problem

Common symptoms

  • Lost Device message
  • General fault indication
  • Additional sounder indication may appear if the missing device is a sounder

Checks to make

  1. Identify the affected device from the panel event information
  2. Check the device and its connections
  3. Inspect the relevant loop wiring for damage or disconnection
  4. Restore communication and confirm the panel returns to normal

Safety

  • Fire alarm loop work should be carried out by competent personnel and the system's impairment must be managed in accordance with site fire-safety procedures.

Model notes

Gent defines Lost Device as a device that is no longer communicating with the panel via the loop.