Abus Smartvest FURM35000A Bedienungs-, Installations- Und Wartungsanleitung Seite 54

Changing the battery
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Care and maintenance
Turn the detector anticlockwise and remove it from the
mount.
Remove the old batteries.
Insert two new batteries, ensuring that the polarity is
correct.
Test the smoke alarm device. To do so, press and hold the
Test button for > 5 seconds; the detector repeats the
pattern: 3 alarm tones, 1.5-second pause.
Turn the detector clockwise onto the mount.
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