- Red light flashes four times every 50 seconds, meaning that a CO level above
80 ppm has been detected and that the unit was previously in alarm.
- Red light flashes eight times every 50 seconds, meaning that a CO level above
150 ppm has been detected and that the unit was previously in alarm.
Reset Memory by holding down the test button for over 12 seconds until the red
light stops flashing. Cover the horn with a cloth to muffle the alarm during this time.
Please note that the memory will also be reset when the unit is switched off.
3. Where to Place CO Alarms
3.1 Ideally a Carbon Monoxide Alarm should be installed in:
- Every room containing a fuel burning appliance, and
- Remote rooms where occupants spend a considerable amount of time
- Every bedroom.
However if the number of Carbon Monoxide Alarms to be fitted is limited, the
following points should be considered when deciding where best to fit the alarm(s)
- If there is an appliance in a room where people sleep, place a CO Alarm in this
room and
- Locate a CO alarm in a room containing a flueless or open-flued appliance, and
- Locate an alarm in a room where the occupant(s) spend most of their time (e.g.
sitting room) and
- In a bedsit, the CO alarm should be placed as far away from the cooking appliance
as possible, but near to where the person sleeps and
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