41
en
Possible causes for an
alarm without re as the
cause
• In some rooms, there is ususally more
dust than in others. A bedroom is often
one such room. Frequently they contain
plush carpets; clothing, bed spreads and
pillows etc. are often stored in bedrooms
and moved around a lot (e.g. shaking).
Drafts in the rooms (e.g. open windows,
fans) can lead to small amounts of dust
accumulating in the device over time.
• One or more of the following substanc-
es have entered directly into the device:
steam and vapors from cooking, boiling
or frying; air freshener, fragrances, or in-
sect spray; pollen; dust from construction
or sanding; ne dust.
• One or more very small insects or oth-
er very small organisms have gotten past
the insect barriers of the device.
Carefully cleaning the device regularly
with a vacuum cleaner helps avoid a false
alarm due to soiling.
• Extreme temperature uctuations or
very strong electro-magnetic radiation
in the direct vicinity of the smoke alarm
device have an effect on the device.
• Cigarette smoke only sets off the alarm
when smoke enters the smoke alarm
device either directly from the imme-
diate vicinity or due to extremely high
concentrations.
To avoid a false alarm from the smoke
alarm device due to soiling, the device
should be protected against all of the
environmental effects mentioned here.
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