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Operating and Alarm Characteristics
LED Display Shows Alarm Sound Unit Status Recommendation
"---" then "888" 4 quick beeps,
5 seconds
silence,
repeated once
Self checking (Test
button was pressed)
None – CO has not
been detected.
Steady “0” displayed. None Normal AC operation
(sensing no CO) and
with good batteries
None
An alternating display of
"CO" and the CO
concentration from 30-
999.
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)
Display alternates
between 'Lb" and current
CO level, (0-999)
One quick
beep every
60 seconds
AC powered
and in Low
Battery
condition
Replace batteries
Steady “Err “displayed One quick
beep every 30
second
Unit malfunction
If "Err" continues, unit has
malfunctioned and must be
replaced immediately.
Unit will not respond to
CO. Press the Peak Level
button while unit is in
"Err"mode to obta
in error
code and call Product
Support line.
No display. Green LED
flashes briefly once
every 60 seconds.
None
Battery backup
operation. Unit
monitoring for CO.
Verify AC power is
restored as soon as
possible to conserve
batteries.
6. Operating Characteristics
Whenever the KN-COP-DP-B is operating, the digital display will display “0” (with AC
applied) to indicate the unit is monitoring for CO. If the alarm senses dangerous levels
of CO, the digital display will alternate between "CO" and the measured CO
concentration in parts per million (PPM), and the alarm will emit an audible alarm
pattern. This alarm will display a “0” if CO concentrations between 0 and 30 PPM
have been detected within the last 15 seconds.
When the unit is first powered up, the digital display will show three “eights” –
indicating the alarm is in the start-up mode. The three “eights” will remain for
approximately 5 seconds. After 5 seconds, the alarm should display “0” and begin
monitoring the air for CO and will continue to do so as long as it receives power.
The digital display will be brightly lit if the unit is in alarm, or in high light, and then
will become dim in the standby condition during low light conditions.
The following table illustrates the possible digital displays, describes the audible
alarm patterns, and the recommended actions to take.
"End" displayed.
Red LED flashes
two times every 30
seconds
2 quick beeps
every 30
seconds.
End of unit life
Replace unit immediately.
Refer to Section 2 for End
of Life Warning. Remove
and properly dispose of
batteries.
An alternating
display of
"PCO" and the CO
concentration (PPM)
None
Unit has detected
100ppm or more
CO
Push test/reset button,
check appliances
2551-7201-01_EN.qxp__ 15-6-1 下午1:34 页 13
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