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12.2.3. Faulty smoke chamber
In the unlikely event of the smoke sensing chamber becoming defective, the
Alarm will give 2 short beeps with 2 yellow LED flashes every 32 seconds. The
Alarm must then be replaced.
If it is not convenient to replace it immediately, press the test button. The
yellow LED will flash rapidly while the test button is held. Release the test
button, this will silence the beeps and stop the yellow LED flashing for 12
hours. This can be repeated as required.
12.3. Diagnostic Modes
During annual maintenance and service authorised personnel can use the
very useful diagnostic modes to investigate if there have been previous alarm
conditions, identify a Alarm with a fault condition and predict fault conditions
that are likely to manifest themselves before the next annual service.
12.3.1. Predictive failures
Pressing and holding the test button will indicate if there is likely to be a low
battery or contaminated chamber fault before the next annual visit. The yellow
LED will flash rapidly and the alarm will ramp to full sound in the event of a
potential low battery fault. In the case of a potential contaminated chamber
fault, the yellow and red LEDs will flash alternately and the Alarm will ramp
to full sound. If the yellow and red LEDs flash alternately and the Alarm does
not sound then the Alarm has reached its end of life - this can be verified by
checking the date code label also.
To avoid a call out before the next annual service we recommended the Alarm
be replaced.
