Operation
When the battery is depleted:
•A blinking dot will be displayed and the sounder will chirp approximately every 30 seconds.
•Pressing the test button will result in a chirp approximately every one second. The alarm will not detect CO if battery is depleted. Replace the battery.
Constant exposures to high or low humidity may reduce battery life. We recommend you replace your 9V battery at least every six months.
How to Test Your Alarm
Testing the Electronics
You should test the alarm once a week, following the directions listed
below. If at any time you test the alarm and it does not perform as described below, have it replaced immediately. See “How to know if your alarm is mal- functioning” on page 17 for a description of the characteristics of a mal- functioning alarm and what you should do if a malfunction occurs.
Observe the alarm weekly to make sure the red dot is blink- ing, indicating normal operation.
If the dot is not blinking, unplug the alarm, then plug it in |
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again. This will clear the alarm for restart. If the dot does | Blinking Dot |
not resume blinking, your alarm may be malfunctioning. |
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To test the alarm, press the Test/Reset button. If the unit is operating prop- erly, you should notice the following:
•The display shows three eights 
, and then shows a num- ber (usually around 200). You should then hear 4 quick beeps – followed by 5 seconds of silence – followed by 4 quick beeps. The unit will then show the three eights for several seconds. It will then return to monitoring for carbon monoxide.
Familiarize yourself and household members with the alarm pattern described above. In the event of a CO incident, this pattern will continue to repeat as long as CO is present.
NOTE: Pressing the Test/Reset button tests the functions of the alarm’s inter- nal components, circuitry and
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