Low-level Icon
This icon will appear and a loud, 85 dB alarm will sound a double beep every eight seconds when a
low-level of CO (15 ppm – 34 ppm)
has been continuously detected for 5 minutes. To silence the low-level CO monitor, press the Test/Reset button. If the CO level remains in
this range for the next 5 minutes, the icon will re-appear and the horn will sound again.
If the low-level icon is visible, but the horn is not sounding, the low-level CO monitor has, in your absence, registered at least 15 ppm of CO
for 5 minutes. The CO level has since returned to levels below 15 ppm, and the low-level CO monitor has stopped sounding. The icon
remains on to alert you that the CO low-level CO monitor had sounded.
Continued low-level alarms are an indication that the potential of a high level alarm exists. You should treat this alarm level very seriously.
Prolonged low-levels of CO are believed to cause brain damage and heart disease, particularly in children and pregnant women. Call a CO
certified technician and have the problem investigated and rectified immediately.
High Level Icon
High Level Alarm
If a
high level of CO, (between 36 ppm - 70 ppm)
has been detected for 5 minutes this icon will appear and a loud, 85 dB alarm will
sound four beeps every four seconds. Press the Test/Reset button to turn the high level icon off and silence the low-level CO monitor for 5
minutes. If the CO level remains in this range during this 5 minutes, the monitor will alarm again sound, and the icon will reappear.