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Normal Operating Characteristics
When you first power up the unit, the alarm will sound briefly to let you
know the unit is receiving power and that the alarm circuit is functioning.
You will see three eights on the digital display, indicating the alarm is in the
start-up mode. The three eights will remain for approximately 20 seconds.
You will see a blinking red dot to the lower right of the digital display. The
blinking dot shows that the alarm is operating.
Within 20 seconds, your CO alarm will start monitoring for CO. The number
indicates a measurement of carbon monoxide in parts per million (ppm).
Note: The number will probably be zero (0). This is a normal condition for
most households and shows that no measurable amount of CO has been
detected.
The alarm has begun monitoring the air for carbon monoxide and will con-
tinue to do so as long as it receives power.
When the alarm is unplugged or loses power
and a good 9V battery is
installed,
the alarm will automatically switch to its battery backup mode
and you will notice the following:
• The digital display will show a blinking dot only – this helps conserve
the battery’s power.
• The digital display will show a number only if it senses carbon monox-
ide while in backup mode.
• If CO is detected while on battery backup, the alarm pattern is 4 quick
beeps – followed by 5 seconds of silence –followed by 4 quick beeps.
After 4 minutes, the alarm pattern is 4 quick beeps every 60 seconds.
Note: The
alarm
will operate on battery backup for at least 20 hours
.
When AC power is restored, the alarm will automatically switch back to nor-
mal operating mode.
When the alarm is unplugged or loses power and you have a low battery
installed, you will notice the following:
• A fading alarm will sound alerting you the unit has switched to its
backup mode, but the 9V battery is low.
• A blinking dot will be displayed and the sounder will chirp every 15
seconds.
• When peak level is pushed, the display will alternate between “Lb.”
and CO reading.
Operation
Blinking Dot