AC Powered in Normal Stand-by Operation
LED Display Alarm Sound Unit Status Unit Condition Recommended
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If at any time you test the alarm and it does not perform as described, have it replaced immediately.
DC Powered in Battery Backup Operation
LED Display Alarm Sound Unit Status Unit Condition Recommended
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Display Readings
“0”. None. Operation on
battery backup,
sensing for CO.
Battery is fully
charged. First 5
minutes on
battery backup
“0” or CO
concentration
displayed
once every 60
seconds;
flashing dot.
None.
Battery conserve
mode, sensing for
CO.
Battery is fully
charged and after
5 minutes of
operation on
battery backup.
Connect to AC
power.
Normal battery-
only operation.
To recharge
battery connect
to AC power.
“0”
alternating
with “Lb” and
a flashing dot.
None.
Charging battery
pack. Initial
power-up or power
was reset.
Battery
discharged less
than 10 hours on
AC. Battery is in
charge state.
Keep unit on AC
to fully charge
battery. “Lb” will
disappear once
battery is charged
depending on
initial charge.
“0”
alternating
with “Lb” and
a flashing dot.
1 beep every
15 seconds.
Battery
disconnected or
not charging.
Battery
discharged or
disconnected
longer than 10
hours.
Connect battery
pack. “Lb” will
disappear once
battery is charged
depending on
initial charge.
Flashes
alternately
31
“0” or CO
concentration
alternating
with “Lb”.
None. Battery conserve
mode, sensing for
CO.
Battery is partially
discharged, first 5
minutes of
operation on
battery backup.
Connect to AC
power to fully
recharge battery.
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