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When you first power up the alarm: The alarm will sound briefly,
then the green Operate LED will light. This indicates that the CO alarm is
receiving power and that the alarm circuit is functioning.
Within a few minutes, your carbon monoxide alarm will start monitoring
for CO and will continue to do so as long as it receives power.
When the CO alarm loses power: If you have a good 9V battery
installed, the alarm will automatically switch to the battery backup mode
and the green LED will flash approximately every 10 seconds. The unit
will continue to operate normally and detect CO for at least 20 hours.
When AC power is restored, the alarm will automatically switch back to
normal operating mode and the green LED will come on continuously.
When the CO alarm is unplugged: If the unit is unplugged it will pro-
duce a constant tone until the battery is removed or the unit is plugged
back into the wall unless the Tamper-Resist feature has been deactivated
or disabled.
Observe the CO alarm regularly to make sure the green Operate LED is
on, indicating normal operation.
If the green Operate LED is not on, unplug the CO alarm, then plug it in
again. This will clear the alarm for restart. If the green Operate LED does
not light, your CO alarm may be malfunctioning.
When the CO alarm detects an error condition: If the unit detects an
internal error or malfunction, it will produce one beep every 30 seconds
with a red LED flash. If error condition continues, replace the CO alarm
immediately. Unit will not respond to CO in this condition.
6.Operating Characteristics
2519-7201-03(820-1281 Rev B)_da.qxd:_ 2011.1.25 2:19 PM
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