Ampac Orbis, Product Manual, Page: 19 / 22

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MAN1509-4
ORBIS AUSTRALIAN PRODUCT GUIDE
10.5 Maintenance and testing
Detectors should be checked regularly at the intervals indicated by the locally applicable code of
practice.
Ampac recommends that detectors be checked at least once a year.
One of the features of Orbis is FasTest® which makes it possible to carry out a functional test, using
smoke or heat, within about four seconds.
NOTE: Refer MAN3046 Ampac Detector Cleaning, Maintenance, and Functional Test
Procedures for correct equipment and methods for testing.
If detectors are externally dirty they can be cleaned carefully with a damp cloth using a small amount
of industrial alcohol.
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DirtAlert™
Orbis detectors have drift compensation to compensate for changes caused by the environment. The
most usual change is contamination.
If the detector is dirty to the point where it can no longer compensate, its LED will flash yellow while it
is in StartUp. Maintenance checks should therefore include removing a detector from its base and
re-inserting it or pressing reset on the panel to initiate StartUp.
A flashing yellow LED is not a sign that the detector needs to be replaced immediately. The decision
to replace the detector should be made by the service engineer who in turn should take into account
the operating environment. If the detector is not replaced it will eventually cause false alarms.
When deciding how long to leave the detector on site in such a case, the following rule of thumb may
be used:
Installation time + 25%- that is by way of example, if a detector had been installed for four years
when the LED flashed yellow, it could be left in place for up to 12 months.