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When you first power up the alarm: The red Alarm LED will light and
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.
6. KN-COB-DP-LS Operating Characteristics
How to Install Your Alarm
Direct Plug Alarm
To install:
1. Choose a standard 120V unswitched outlet to
plug the alarm into.
2. If outlet is mounted sideways (horizontally), rotate
the plug and plug the alarm in.
CAUTION: Do not rotate the alarm while it is
plugged into an outlet, as damage to plug may
r
esult.
Important Labels Provided
Two labels have been provided that have important information on what
to do in case of an alarm. Add the phone number of your emergency
service provider in the space pr
ovided. Place one label next to the alarm
after it is mounted, and one label near a fresh air source such as a door
or window.
4. Installation Instructions
90º ROTATING DIRECT
PLUG
5. Alarm Characteristics
Carbon Monoxide Alarm Indicator
When the alarm senses a dangerous level of CO, the unit will emit a
loud alarm pattern. The alarm pattern is 4 quick beeps followed by 5
seconds of silence. This cycle repeats as long as a dangerous CO condi-
tions exist. The red Alarm LED will flash the same pattern (and the PPM
will be displayed on alarms with digital displays).
WARNING: When powered by battery backup only; after four minutes,
the alarm will sound and flash only once every minute, until the alarm is
reset or the CO is eliminated.
If the unit is unplugged it will pr
oduce 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.
WARNING: If at any time you test the alarm and it does not perform as
described, have it r
eplaced immediately.
Carbon
monoxide
alarm
Red LED flashes with
beeps.
4 quick beeps,
5 seconds silence,
repeating
Alarm condition.
Dangerous
concentrations of CO
detected
Refer to “What to do
When the Alarm Sounds”
(inside front cover)
Low
battery
Red LED flashes every
15 seconds
One quick beep
every 15 seconds
AC powered and low
or missing battery
Install or replace 9V bat-
tery.
Error/ serv-
ice alarm
Red LED flashes every
30 seconds
One quick beep
every 30 seconds
Unit is in error condition
Error Red LED
constantly on
Constant alarm Very low battery or unit
malfunction
Replace battery.
If “Err” continues, unit
has malfunctioned.
Replace immediately. Unit
will not respond CO
Normal
Test/Reset
function
Red LED flashes with
beeps. Green and
amber LED’s on
4 quick beeps,
5 seconds silence,
repeated once
Normal operation when
Test/Reset button is
pressed
CO not detected.Alarm
for test purposes only
Operating and Alarm Characteristics
Function LED Display Alarm Sound Unit Status Recommendation
Normal
Operation
Green LED
constantly on
None Normal AC
operation (sensing no
CO) and with a good
battery
None
Normal
Operation
Green LED flashes
every 7 seconds
None Normal DC operation
on 9V battery backup
Verify AC power is
restored as soon as
possible to conserve
battery. Replace battery.
6. KN-COB-DP-LS Operating Characteristics
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 Model KN-COB-DP-LS CO alarm loses power: If you have a good
9V battery installed, the alarm will automatically switch to the battery back-
up 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 the Model KN-COB-DP-LS CO alarm loses power: If you have a
good 9V battery installed, the alarm will automatically switch to the battery
backup mode and the gr
een LED will flash approximately every 10 seconds.
The unit will continue to operate normally and detect CO for at least 20
hours.
If the battery is low or missing, or if the unit malfunctions, it will alarm dif-
ferently to alert you of specific conditions. Please familiarize yourself, and
other family members, of the difference between a CO alarm and an indica-
tion signifying a problem with the unit.
When AC power is restored, the alarm will automatically switch back to nor-
mal operating mode and the green LED will come on continuously. 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 oper-
ate LED does not light, your CO alarm may be malfunctioning.
The following table describes the audible alarm patterns and the recom-
mended actions to take.