Maintenance
Testing
Test the alarm once a week, following the directions listed
below. If at any time after testing the alarm, it does not
perform as described below, have it replaced immediately.
See the following section for a description of the
characteristics of a malfunctioning alarm and what should
be done if a malfunction occurs.
Observe the CO alarm regularly to make sure the green
operate light is on, indicating normal operation.
If the green operate light is not on, unplug the CO alarm,
then plug it in again. This will clear the alarm for restart.
If the green operate light does not come back on, the CO
alarm may be malfunctioning.
To test the CO alarm, press and release the Test/Reset
button, to hear 4 quick beeps – followed by 5 seconds of
silence – followed by 4 quick beeps. Notice the Red
Alarm Light flashes when the unit alarms. The alarm will
then return to monitoring for carbon monoxide.
NOTE: Pressing the Test/Reset button tests the functions of
the CO alarm’s internal components, circuitry and micro-
computer.
YOU DO NOT NEED TO PRESS THE TEST BUTTON TO
TAKE A CO READING.
Caution: Continuous exposure to the loud 85 decibel alarm at
close range over an extended period of time may cause hearing
loss.
This CO alarm performs an internal self-diagnosis every
fifteen seconds to make sure that it is functioning
properly. The CO alarm is designed to alert in the
unusual event of a malfunction.
M a i n t e n a n c e
Malfunction
In the rare event that your alarm malfunctions, it will alert
with one of these signal groups (depending upon the type
of malfunction that occurs):
Malfunction Signal Group 1 - Component Failure
• An intermittent “chirping” alarm will sound every 30
seconds. OR,
Malfunction Signal Group 2 - Microprocessor Failure
• The alarm will sound continuously, and the alarm
cannot be shut off by pushing the “Test/Reset” button.
Unplug the CO alarm immediately and return for warranty
exchange.
PLEASE familiarize yourself with the malfunction alert, and
do not confuse these signals with a low battery warning
(below) and an alarm. After reading the information
above, if you are still unsure whether your CO alarm is
operating properly, call the Kidde toll-free Consumer
Hotline at
1 800-880-6788
to do a quick diagnostic check
of the alarm over the phone.
Battery Replacement
Low Battery Warning (Model
KN-COB-LCB-A
only): If the
9V battery is missing or the battery’s power is low, the
unit will chirp every 15 second to indicate the battery
must be replaced. If the battery is depleted beyond point
of having the capacity to operate the unit, it will chirp
every 30 to 45 seconds and will
NOT
respond to the test
button being pressed if operating on battery power.
THE BATTERY MUST BE REPLACED IMMEDIATELY!
Low Battery HUSH® (Model
KN-COB-LCB-A
only): When
the battery needs to be replaced, the unit will produce a
low battery warning. The Low Battery HUSH® feature
allows you to press the button on the alarm and disable
the “chirp” for a random period of up to 12 hours. This
gives you a chance to replace the battery at a more
convenient time without sacrificing your safety by
disconnecting the alarm from power. During this Low
Battery HUSH
®
period, your alarm is monitoring for CO.
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