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6. Interpreting signals
6.3 Diagnosis for i series
During the annual maintenance and service check, you can use the i series' diagnosis
mode to find out whether alarms have been set off, identify if the device is faulty or
predict fault conditions that are likely to arise before the next annual service. Diagnosis
modes are an extra feature and are only available for models in the i series.
6.3.1 Predicting faults
By pressing and holding down the test button, you can find out whether the battery
is likely to go flat before the next annual service or whether the smoke chamber might
soon become contaminated. If there is a potential fault due to a low battery, the yellow
LED flashes quickly and the warning sound is emitted, slowly rising to full volume. If
there is a potential fault due to contamination in the smoke chamber, the yellow and
red LEDs flash alternately and the warning sound is emitted, slowly rising to full volume.
To avoid having to take additional action before the next annual service, we recommend
replacing the alarm.
6.3.2 Alarm memory function
The red LED flashes twice every 16 seconds if the alarm has gone off in the last 24 hours.
If the red LED flashes every 0.5 seconds and the buzzer “chirps” quickly when you press
and hold the test button, it means that the alarm has gone off more than 24 hours ago.
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