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CHAPTER 4: Testing and Maintenance

Weekly Testing

Push and hold the Test/Silence button on the
cover until a loud alarm sounds— 4 beeps, a
pause, then 4 beeps. The alarm sequence should
last for 10 seconds. If the alarm ever fails to test
properly, replace it immediately. If the CO alarm
is not working properly, refer to Chapter 10:
“Limited Warranty”.
WARNING!
The Test/Silence button is the only proper way
to test the CO alarm. NEVER use vehicle
exhaust! Exhaust may cause permanent
damage and voids your warranty.
WARNING!
DO NOT stand close to the alarm when the
horn is sounding. Exposure at close range
may be harmful to your hearing. When testing,
step away when horn starts sounding.

Regular Maintenance

To keep the CO alarm in good working order:
• Test it every week using the
Test/Silence button.
• Vacuum the CO alarm cover at least twice
a year, using the soft brush attachment.
Test the alarm again after vacuuming.

• Replace the battery when the CO alarm

“chirps” and the red light flashes once a

minute (the low battery warning).

NOTE: The low battery warning should last for
30 days, but you should replace the battery
immediately to continue your protection.

Choosing a replacement battery:

This unit requires one standard 9V alkaline battery.
The following alkaline batteries are acceptable as
replacements. This list supplements the list on the
carbon monoxide alarm battery door: Eveready
#522 (Energizer); Duracell #MN1604, MX1604
(Ultra). You may also use a Lithium battery like an
Ultralife U9VL-J for longer service between
battery changes. These batteries are available at
many local retail stores. Replacement batteries
are commonly available at local retail stores.
IMPORTANT!
Use only the alkaline or lithium replacement batteries
listed. The unit may not operate properly with other
batteries. Never use rechargeable batteries since
they may not provide a constant charge.
CAUTION!

DO NOT spray cleaning chemicals or insect

sprays directly on or near the CO alarm. DO

NOT paint over the CO alarm. Doing so may

permanently damage the CO alarm.

IMPORTANT!
Household cleaners, aerosol chemicals and other
contaminants can affect the sensor. When using
any of these materials near the alarm, make sure
the room is well ventilated.