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NEVER IGNORE THE ALARM.
Pre-Alarm: When the alarm detects over 50ppm CO the red light flashes every 2 seconds. This helps
locate CO leaks as the unit gives an indication straight away. (Without this feature the CO level would
need to be at 50ppm CO for 90 minutes for an indication to be given). Note the Pre-Alarm signal may be
triggered by CO coming for example, from cooking with gas, from car engines or from nearby barbecues.
This is usually not a concern unless the Pre-Alarm signal persists until the alarm sounds and the CO
source is unknown.
NOTE: The CO Alarm may sound if cigarette smoke is blown into it, or aerosols are released nearby.
CO ALARM MEMORY.
When the test button is pressed the horn will sound, and the red light will only flash if the unit has
previously detected CO and been in alarm. The flash rate indicates the level of CO detected as below:-
- Red light is Off – No CO detected since reset or power up.
- Red light flashes 2 times (in 2 seconds) every 40 seconds, 50 ppm CO detected for about 90 minutes
since reset or power-up.
- Red light flashes 4 times (in 2 seconds) every 40 seconds, 100 ppm CO detected for about 40
minutes since reset or power-up.
- Red light flashes 8 times (in 2 seconds) every 40 seconds, 300 ppm CO detected for about 3 minutes.
Reset Memory by holding down the test button for over 20 seconds until the red light stops flashing.
Cover the horn with a cloth to muffle the alarm during this time.
Ei261-DEN Only
When the test button is held the display shows the previous peak reading. This tells you if the unit has
detected CO in your absence and helps to detect and locate leaks, monitor premises etc.
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