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necessary to clean the alarm more frequently. Use the narrow nozzle attachment of your
vacuum cleaner to remove dust, insects and cobwebs from the sides and cover slots where
the smoke/heat enters. To clean the cover, wipe with a damp cloth then dry thoroughly with
a lint free cloth.
WARNING: Do not paint your Alarm.
If the amber light flashes on the unit every 40 seconds (without a beep) it indicates that the
optical sensor chamber is contaminated. The entire unit must be replaced if it is over 10
years old (see “replace by” date on the label on the side of the unit) or if it is less than 10
years old the unit can be returned for servicing - see “GETTING YOUR ALARM SERVICED”
section on page 18.
Automatic Dust Compensation.
The alarm monitors the contamination build-up in the chamber and then slowly
compensates for it over about a 5 hour period - this is to ensure that a slow burning
smouldering fire over a long period is not confused with dust build-up.
If the contamination has occurred quickly (e.g. due to dust from carpets being replaced) and
the alarms are sounding, the dust compensation may take some hours to operate. In this
situation remove the alarm from the ceiling, leave it disconnected for 5 minutes, then
reinstall the unit (the air must be clean i.e. dust and smoke free). The dust compensation will
now operate quickly within 45 seconds.
Other than the cleaning described above, no other customer servicing of this product is required.
Servicing/repairs, when needed, must be performed by the manufacturer.
All alarms are prone to dust and insect ingress which can cause false alarms or failure to alarm.
The latest design, materials and manufacturing techniques have been used in the construction of our
alarms to minimize the effects of contamination. However it is impossible to completely eliminate the
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