– 38 –
Alarm mute function
Once the device is in alarm mode, the alarm sound
can be deactivated for 10 minutes by pressing the
test / stop button.
If the mute function is active, the red LED will
flash once approximately every 8 seconds.
If, after this 10-minute mute period, fire smoke
is still detected in the smoke measuring chamber,
the acoustic alarm will sound again.
Only activate the alarm mute function when you are
absolutely sure that you can exclude a cause of fire!
Care and maintenance
What to do in case of false alarm?
Possible causes of false alarm include: Welding and cutting, soldering and other hot
work, sawing and grinding, dust created from building work, e.g. cleaning, extreme
electromagnetic effects, changes in temperature which lead to condensation in the
alarm as well as small insects and pollen.
• If a false alarm is being caused by work close to the device, it should be
temporarily covered up or removed. Upon completion of the work, it is
imperative, however, that the device be returned to its original opera-
ting state and be checked!
Display and functions | Care and maintenance
