User Manual

FIREli nk - 25 – Installation Manual Page 37 of 40

9-5-0-344/ISS4/OCT10

9 Troubleshooting

9.1 Nui sance Alarm s Occur Too Often

 Check that the ClassiFi r e al arm factor setting i s appropriate for the norm al working environment of

the pr otected area. See section 2.2.4

 Check that the detector is not in Demonstrat ion mode. T his can be ascertained by viewing the

ev ent log (see sect ion 2) and checking that the entr y Demo mode has a higher log entry number

than the most recent FastLearn start and FastL earn end entries. Remember that the log entries

are in reverse order, with the most rec ent ent ri es appearing first. If the l og shows that

Dem onst r ation mode was invoked dur ing the last FastLear n per iod, star t a new FastLear n and

allow it to c om plete its 24-hour c y cl e ( see section 2.2.6).

 Fr om the event log (see secti on 6) , chec k that 24 hours have elapsed sinc e the last FastLearn end

entry.

 Check that day-night switchover times are appropriately set to r eflect activ e and non-act ive periods

(see sect ion 2.3. 1).

9.2 E l evated Smoke Levels Do Not Generate Alarms

 Check that detector is not Isolated or in FastLear n (if Isolated, the Fault li ght will be lit)

 Check that the detector sampli ng points are in the smoke stream

 Check that the correc t ClassiF ire alarm setting has been set (see section 2. 2.4)

 Check that the detector has either had a 24 hour learning per iod or that it has been plac ed in

demons tration mode.

9.3 Low Mean Output

 Check that the filter does not require changi ng ( see section 2.8.3) and that t he air pl enum chamber

is clean. The chamber m ay become cl ogged when, for ex am ple, heavy building activity has

occur r ed near the sampling pipes. If so, the c ham ber m ay require factor y service. The detector is

not desi gned to handle large quantities of coarse debri s and du st .

9.4 Detector S ensi tivity Vari es Over Time

 Ther e ar e m any r easons why particle densities may vary, and the Classi Fire system automaticall y

compensates for this in order to repl ac e the likelihood of nuisance alarms due to normal variations

in bac kground smoke densi ty. Within limits set by the ClassiFire alarm fac tor, this is a norm al part

of the detector‘s working.

9.5 Fl ow Fault Errors

 These occur when the airflow rat e into the detector is outside t he pr e-programmed limits. As the

detector ‘l ear ns‘ the flow setup from the initial install ation, this usuall y m eans that there has been

some c hange in conditions. A Fl ow high fault may indicate that a sampling pi pe is damaged, and a

Flow l ow fault may indi c ate that t he pipe has been bl oc k ed, for ex am ple, by near by building

operations.

 If the detect or input is sampled from one area and the ex haust is in another ar ea wi th different

pressure (for ex ample the detector i s in a roof space and sampling fr om an encl osed room), this

m ay lead to flow faults. In this case it woul d be nec essary to lead a pipe fr om the ex haust to the