Edwards LaserSense HSSD-2

Chapter 5: Troubleshooting
64 LaserSense HSSD-2 Aspirating Smoke Detector Installers Handbook
Troubleshooting the detector
This chapter provides some possible solutions if a problem should occur with
your detector. If the problem is not addressed in this chapter or, if after
performing the suggested actions, the problem persists, contact Technical
Support.
Note: Consult either the Remote Control Software User Manual or SenseNET
Software User Manual for more information about the solutions or corrective
actions discussed here.
Table 6: Troubleshooting guide
Problem Solution or corrective action
Pressing <Reset> or
<Isol> button has no
effect
Check that the controls have been enabled. These functions are disabled
by default. (See “Reset, test & isolate button enable” on page 49 for
details.)
Nuisance alarms
occur too often
Check that the ClassiFire alarm factor setting is appropriate for the normal
working environment of the protected area. (See “ClassiFire alarm factor”
on page 45 for details.)
Check that the detector is not in demonstration 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. (See “View event log” on page 54 and “Event
log” on page 55 for details.) 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. (Refer to
“FastLearn ON” on page 47 for details.)
From the event log, check that at least 24 hours have elapsed since the
last FastLearn end entry. (See “View event log” on page 54 and “Event log”
on page 55 for details.)
Check that day-night switchover times are appropriately set to reflect active
and non-active periods. (Refer to “Hour start of day and night operation” on
page 46 in Chapter 3 for details.)
Elevated smoke
levels do not
generate alarms
Check that detector is not Isolated or in FastLearn (if Isolated, the Fault
light will be lit).
Check that the detector sampling points are in the smoke stream.
Check that unused sampling pipe ports are closed and that sampling pipes
are firmly and cleanly seated in their ports and undamaged.
Check that the correct ClassiFire alarm setting has been set. (Refer to
“ClassiFire alarm factor” on page 45 for details.)
Check that the detector has either had a 24 hour learning period or that it
has been placed in demonstration mode.
Low mean output Check that the dust separator (filter) does not require changing (refer to
“Dust separator condition” on page 55 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.