Stratos HSSD-2 • INSTALLER'S HANDBOOK

11. Troubleshooting 11.1 Pressing RESET or ISOL. button has no effect• Check that the controls have been enabled. These functions are disabled bydefault. See section 3.4.2411.2 Nuisance alarms occur too often• Check that the ClassiFire alarm factor setting is appropriate for the normal workingenvironment of the protected area. See section 3.4.5• Check that the detector is not in Demonstration mode. This can be ascertainedby viewing the event log (see sections 3.4.43 and 7) and checking that the entryDemo mode has a higher log entry number than the most recentFastLearn start and FastLearn end entries. Remember that the log entriesare in reverse order, with the most recent entries appearing first.If the log shows that Demonstration mode was invoked during the last FastLearnperiod, start a new FastLearn and allow it to complete its 24-hour cycle. (Seesection 3.4.8)• From the event log (see sections 3.4.43 and 7), check that 24 hours have elapsedsince the last FastLearn end entry.• Check that day-night switchover times are appropriately set to reflect active andnon-active periods (see section 3.4.6).11.3 Elevated smoke levels do not generate alarms• Check that detector is not Isolated or in FastLearn (if Isolated, the Fault light willbe lit)• Check that the detector sampling points are in the smoke stream• Check that unused sampling pipe ports are closed and that sampling pipes arefirmly 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 hasbeen placed in demonstration mode.11.4 Low mean output• Check that the filter does not require changing (see section 3.4.47) and thatthe air plenum chamber is clean. The chamber may become clogged when, forexample, heavy building activity has occurred near the sampling pipes. If so, thechamber may require factory service. The detector is not designed to handle largequantities of coarse debris and dust.11.5 Detector sensitivity varies over time• There are many reasons why particle densities may vary, and the ClassiFire systemautomatically compensates for this in order to replace the likelihood of nuisancealarms due to normal variations in background smoke density. Within limits set bythe ClassiFire alarm factor, this is a normal part of the detector‘s working.Page 47Stratos HSSD-2 • INSTALLER’S HANDBOOK • Iss. 10© AirSense Technology. 2009