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11. Troubleshooting
Page 40
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11.1 Nuisance alarms occur too often
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Check that the ClassiFire alarm factor setting is appropriate for the normal working
environment of the protected area. See section 3.5
Check that the detector is not in Demonstration mode. This can be ascer-
•
tained by viewing the event log (see section 3) and checking that the entry
Demo
mode has a higher log entry number than the most recent
FastLearn start and FastLearn end entries. Remember that the log
entries are in reverse order, with the most recent entries appearing first.
If the log shows that Demonstration mode was invoked during the last FastLearn
period, start a new FastLearn and allow it to complete its 24-hour cycle. (See
section 3.7)
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From the event log (see sections 8), check that 24 hours have elapsed since the
last FastLearn end entry.
•
Check that day-night switchover times are appropriately set to reflect active and
non-active periods (see section 3.11).
11.3 Elevated smoke levels do not generate alarms
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Check that detector is not Isolated or in FastLearn (if Isolated, the Fault light will
be lit)
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Check that the detector sampling points are in the smoke stream
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Check that the correct ClassiFire alarm setting has been set (see section 3.5)
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Check that the detector has either had a 24 hour learning period or that it has
been placed in demonstration mode.
11.4 Low mean output
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Check that the filter does not require changing (see section 3.33) and that the air
plenum chamber is clean. The chamber may become clogged when, for example,
heavy building activity has occurred near the sampling pipes. If so, the chamber
may require factory service. The detector is not designed to handle large quanti-
ties of coarse debris and dust.
11.5 Detector sensitivity varies over time
There are many reasons why particle densities may vary, and the ClassiFire system
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automatically compensates for this in order to replace the likelihood of nuisance
alarms due to normal variations in background smoke density. Within limits set by
the ClassiFire alarm factor, this is a normal part of the detector's working.
Stratos-Micra • INSTALLER'S HANDBOOK • Iss. 16
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