Properties Of The Lisa Smoke Detector; Mute Function - HumanTechnik lisa Mode D'emploi

5. Properties of the lisa smoke detector

Automatic readiness for operation
After having been inserted into the base, the smoke detector auto-
matically starts operation.

Mute function

The audible alarm of the smoke detector can be muted for 10 minu-
tes by pressing the test button for 1 second.
Self-testing
The smoke detector monitors its own functionality. Interferences or a
depleted battery are indicated by tones and the control LED.
10 years battery life
The smoke detector has two fixed batteries: One for the detector
itself and one for powering the module. Should any one of these
batteries be depleted the detector MUST be replaced. The maxi-
mum life of the detector's internal batteries is 10 years. After this
time, the detector should be replaced.
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