User's Manual
SimpliSafeCODetectorOwnersManual(RevisionSSCO1‐A) 2/4 December2011
2. Remove the old batteries and properly dispose of them as
recommended by the battery manufacturer.
3. Install the new batteries. Note the polarity illustration in the
battery compartment. Make sure to carefully seat the red
battery warning flags in the recess of the battery well
4. Close the battery cover .The battery cover of your CO
alarm will not close if all three AA batteries are not
properly installed.
When replacing the batteries, use one of the following
approved brands:
• AA 1.5V Energizer # E91 Alkaline battery
• AA 1.5V Energizer #L91 lithium battery
• AA 1.5V GP #LR6 lithium battery
Replacement batteries can be purchased online from
SimpliSafe at simplisafe.com or in retail stores.
Warning: Use of a different battery may have a detrimental
effect on the alarm operation.
Caution: Constant exposures to high or low humidity may
reduce battery life.
After changing the batteries, the unit will chirp for
approximately 0.5 second and all the LED will flash for 0.5
second. Test your alarm by using the Test/Hush button and
check that the green Power LED is on.
Testing
Caution: Continuous exposure to the high sound level of this
alarm over an extended period of time may cause hearing loss.
Press the test button. You should hear 4 short beeps with a
corresponding three LED flashes in 5 seconds. This cycle will
repeat one more time. We recommend you test your CO
detector weekly.
Silence Feature
If the CO alarm is sounding, pressing the Test/Mute button will
mute the siren; the red light will continue flashing. After 4
minutes, if the CO concentration that caused the alarm
remains at a dangerous level, the siren will reactivate,
sounding 4 beeps, then pausing 1 minute, then sounding 4
beeps again, until the CO condition is resolved.
Operating Modes
Power on mode: Three LEDs blink and buzzer beeps for 0.5
second as soon as the batteries are installed.
Stand-by mode: green LED flashes once in every 60 seconds,
which means the unit is receiving power and also indicates it is
functioning properly.
CO Alarm mode: When the unit senses CO, the red LED light
flashes rapidly and buzzer sounds loudly with repeating 4 quick
beeps and pause 5 seconds and then 4 quick beeps. After 4
minutes of an alarm, the pause will increase to 60 seconds.
Low battery warning mode: The yellow LED flashes once in
a minute and the buzzer chirps also once in a minute. This
warning should last for up to 30 days, but please replace the
battery asap before battery power is completely exhausted.
Malfunction (Error) mode: The yellow LED flashes three
times in a minute and buzzer chirps once in a minute. This
indicates the unit is malfunctioned and needs to be replaced.
Low sensitivity (Aging) mode: The yellow LED flashes twice
in a minute and buzzer chirps once in a minute. This means
unit needs to be replaced.
End of life signal mode: The yellow LED flashes four times in
a minute and buzzer chirps once in a minute. This indicate the
CO alarm unit is reaching the end of this useful life (around 5
years after the unit was manufactured). Please replace with a
new CO Detector.
Tamper mode: The buzzer chirps once in a minute and the
yellow LED is steadily on .until the CO alarm unit is mounted
back to the bracket properly.
Maintenance tips
To keep your alarm in good working order:
• Perform a CO alarm test once a week
• Vacuum the alarm cover once a month to remove
accumulated dust.
• Never use water or cleaners - they may damage the unit.
• Avoid spraying air fresheners, hair spray, paint, or other
aerosols near the alarm.
• Do not paint the unit. Paint will seal the vents and interfere
with proper sensor operation.
Information about carbon monoxide
Carbon monoxide is a colorless, odorless, and tasteless poison
gas that can be fatal when inhaled. CO inhibits the blood’s
capacity to carry oxygen.
Periodically review this alarm manual and discuss your CO
alarm emergency procedure with all members of your family.
Never ignore a CO alarm. A true alarm is an indication of
potentially dangerous levels of CO. CO alarms are designed to
alert you to the presence of CO before an emergency - before
most people would experience symptoms of CO poisoning,
giving you time to resolve the problem calmly.
Determine if anyone in the household is experiencing
symptoms of CO poisoning. Many cases of reported CO
poisoning indicate that while victims are aware they are not
well, they become so disoriented they are unable to save
themselves either by exiting the building or calling for
assistance. Also, young children and household pets may be
the first affected. You should take extra precautions to protect
high-risk persons from CO exposure because they may
experience ill effects from CO at levels that would not ordinarily
affect a healthy adult.
Symptoms of CO poisoning
The following common symptoms are related to CO poisoning
and should be discussed with ALL members of the household: