Testing with Carbon Monoxide
The unit checks for CO every 4 seconds and as soon as it detects CO it flashes the red light (as per Table
B)to confirm that is detecting CO gas. Alternatively:
Pressing the test button causes the unit to check for CO - this is the Fast CO Test Mode. This eliminates the long wait normally required e.g. up to 90 minutes at 55ppm CO and up to 3 minutes at 330ppm CO.
The unit can be tested with CO by using one of the kits that comes with CO either in a glass phial or aerosol can. Follow the instructions on the kit but be sure to press the test button to speed up the CO sampling directly after you expose the unit to the CO. It is best if possible to inject the CO gas into the gas entry holes, see Figure 1. When it senses the CO it will give 3 beeps and the red light will flash as per table B. It then resets to normal mode. (If unit fails to respond press test button again as gas can take some seconds to enter sensor).
The Fast CO Test Mode normally does not activate the memory function unless a high level of CO remains in the sensor for a few minutes. (This can be checked by pressing the test button. If the red light flashes continuously indicating CO was detected, hold the test button for 20 seconds until the red light stops flashing as the memory resets).
How to distinguish between CO Alarm and Smoke Alarm Warnings
The CO Alarm has a distinctive
In addition, when your CO Alarm is sounding, the red alarm light in the centre of the cover will be flashing.
Testing both your CO Alarms and Smoke Alarms weekly will help you and your family to clearly distinguish between them in an emergency.
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