End of Life warning
The horn sounds 2 short “chirps” following with 1 long “chirp”every minute. In case of the above warning
happened, the CO alarm is end of life, and the CO alarm should be replaced to a new one.
If your CO alarm sounder is beeping, and you are not sure if it is a CO alarm or malfunction alert, reset the alarm, open
windows for ventilation, turn off fuel-burning appliance (like kerosene or oil heaters, furnaces, wood-burning stoves, water
heaters, or other fossil-fuel burning appliances)
Never ignore a CO unit’s alarm. A true alarm is an indication of potentially dangerous levels of carbon monoxide. CO alarms
are designed to alert you to the presence of carbon monoxide before an emergency, before most people would experience
symptoms of carbon monoxide poisoning, giving you time to resolve the problem calmly.
TESTING THE CO ALARM
• Test the CO Alarm once a week. If the CO Alarm ever fails to test
correctly, have it replaced immediately! If the CO Alarm is not working
properly, it cannot alert you to a problem.
• 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.
Push and hold the Test/Hush button on the cover until the LED flashes. The alarm horn will sound 4 beeps, a pause, then 4
beeps. The ALARM (RED) light will flash.
The alarm sequence should last 5-6 seconds. If it does not alarm, make sure fresh batteries are correctly installed, and test it
again. If the unit still does not alarm, replace it immediately.
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 A) to
confirm that is detecting CO gas.
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. When it senses the CO
，
it will have a Pre-Alarming status, please refer to
table A for all detailed alarming indicators:
CO Alarm Response
CO Level
(ppm)
Pre-Alarming status:
(Red LED only without
beep)
Response Time
(MIN)
Alarming
Red LED Indictor
Alarming Horn
0 ppm
Off
N/A Off
Off
50 ppm
2 Flashes / 4 Seconds
60-90
4 Flashes / 4 Seconds
4 Beeps / 4 Seconds
100 ppm
3 Flashes / 4 Seconds
10-40
4 Flashes / 4 Seconds
4 Beeps / 4 Seconds
300 ppm
4 Flashes / 4 Seconds
<3
4 Flashes / 4 Seconds
4 Beeps / 4 Seconds
(Table A)
If the alarm does not test properly:
1. Make sure that fresh batteries are installed correctly. 2. Be sure the Alarm is clean and dust-free.
