Alecto COA-28 Mode D'emploi page 28

SENSOR FAULT INSPECTION:
When the CO detector is active and functions in standby mode, only the carbon monoxide is
automatically tested every 2 minutes to verify its proper working.
You can use the "TEST/MENU" button to manually test both the carbon monoxide sensor and the
alarm signal.
When the detector identifies an error, it will continuously emit 2 beep tones and, in addition to this
sound, the yellow "FAULT" LED will illuminate.
The display will also light up and show .
When an error is detected, the detector will check every 10 seconds whether the error is still
present until it disappears.
When the detector rapports an error, this could be because of broken circuitry, a faulty sensor or a
permanent defect due to faulty electronic parts. Volatile chemical gases such as alcohol can also be
the cause for error detection. Such errors can be corrected switching the detector off and leave it in
fresh air for 24 hours. This will restore the sensor.
If the error is not cleared after these 24 hours, the detector is faulty and should be replaced.
Don't repair the detector yourself, but have it repaired by the importer.
The following substances and gases can cause false alarms or permanently damage the detector:
methane, propane, iso-butane, ethylene, ethanol, alcohol, iso-propanol, benzene, toluene, acid,
ether, hydrogen, hepatic gas, sulphur dioxide, aerosol, propellant, alcohol preparation, paint,
thinner, dissolvent, bonding agents, shampoo, aftershave balm, perfume, car exhaust (cold start)
and certain cleaning agents. When the alarm is contaminated and damaged by high concentrations
of chemical gases, the sensor could be affected. This will lead to a temporary error or permanent
damage. When the alarm sounds and you can smell a chemical gas, this could be the reason.
Carbon monoxide is a colourless and odourless gas. Chemical gases do have an odour. If the
detector sounds the alarm because of a chemical gas, please switch it off and leave it in fresh air
for 30 minutes. If the detector remains in alarm mode or the concentration shown on the LCD
screen increases or changes only slowly, it means that the alarm is contaminated by a chemical
gas. In this case, remove the batteries and leave the detector in fresh air for a longer period of time
to restore the sensor. If the sensor is still not functioning properly after a week in the fresh air, the
sensor is faulty and the detector can no longer be used.
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