Hochiki FIRElink-400CM - Manual (Page 53)

FIRElink-400 Air Sampling System – Installation Manual Page 53 of 58
© 2010 Hochiki Europe (UK) Ltd 9-5-0-346/ISS4/OCT10
12 Troubleshooting
12.1 Pressing RESET or ISOL. Button Has No Effect
Check that the controls have been enabled. These functions are disabled by default (see section
185619544.01.1.1 “Reset, Test & Isolate Button Enable/Disable (Yes/No - Detectors 000-127)” on
page 21)
12.2 Nuisance Alarms Occur Too Often
Check that the ClassiFire alarm factor setting is appropriate for the normal working environment of
the protected area (see section 185619544.01.1.1 “ClassiFire® Alarm Factor (Numeric - Address
001-127) on page 17).
Check that the detector is not in Demonstration mode. This can be ascertained by viewing the
event log (see section 185619544.01.1.1 “View Event Log (Display - Address 000-127)” on page
25 and section 8 “Event Log” on page 44) 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 185619544.01.1.1 “Start /
Stop FastLearn (Yes/No - Address 001-127)” on page 18).
From the event log (see section 185619544.01.1.1 “View Event Log (Display - Address 000-127)”
on page 25 and section 8 “Event Log” on page 44) 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 185619544.01.1.1 “Hour Start of Day and Night Operation (Numeric - Address 001-
127)” on page 18).
12.3 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 (see section 3.4.5)
Check that the detector has either had a 24 hour learning period or that it has been placed in
demonstration mode.
12.4 Low Mean Output
Check that the filter does not require changing (see section 185619544.01.1.1 “Dust Separator
Condition (Display - Address 001-127)” on page 26) 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.