Troubleshooting
36
AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook
Troubleshooting the detector
This chapter provides some possible solutions if a problem should occur with
your detector.
Note:
Consult either the
Remote Control Software User Guide
for more
information about the solutions or corrective actions discussed here.
Table 5: Troubleshooting guide
Problem
Solution/Corrective Action
Nuisance alarms
occur too often
Check that the ClassiFire alarm factor setting is appropriate for the normal
working environment of the protected area.
Check that the detector is not in demo mode. This can be ascertained by
viewing the event log and checking that the entry demo mode has a higher
log entry number than the most recent FastLearn start and FastLearn end
entries. Note: Remember that the log entries are in re
verse order, with the
most recent entries appearing first. If the log shows that demo mode was
invoked during the last FastLearn period, start a new FastLearn and allow
it to complete its 24-hour cycle.
From the event log, 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 nonactive periods.
Elevated smoke
levels do not
generate alarms
Check that detector is not isolated or in FastLearn (if Isolated, the Fault
light will be lit; if in FastLearn, the OK light will flash).
Check that the detector sampling points are in the smoke stream.
Check that sampling pipes are firmly and cleanly seated in their ports and
undamaged.
Check that the correct ClassiFire alarm setting has been set.
Check that the detector has either had a 24-hour learning period or that it
has been placed in demo mode.
Low mean output
Check that the dust separator (filter) cartridge does not require changing
(refer to “
Replacing the dust separator cartridge
” on page 42 for details)
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 quantities of coarse debris and
dust.
Detector sensitivity
varies over time
There are many reasons why particle densities may vary, and the
ClassiFire system is designed to automatically compensate for this in order
to reduce the likelihood of nuisance alarms due to normal variations in
background smok
e density. Within limits set by the ClassiFire alarm factor,
this is a normal part of the detector‘s operation.
Summary of Contents for AutroSense Micra 10
Page 4: ...ii AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook Glossary 45 Index 47...
Page 46: ...Troubleshooting 38 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook...
Page 52: ...Maintenance 44 AutroSense Micra 10 Aspirating Smoke Detector Installers Handbook...
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