Whenever the alarm is operating, the green Power LED flashes every 30
seconds to indicate the unit is monitoring for CO. If the alarm senses
dangerous levels of CO, the red Alarm LED will flash and the alarm will
emit an audible alarm pattern.
6. Model KN-COPP-B-LS-UK (900-0230)
(with digital display) Operating Characteristics
5. Model KN-COB-B-LS-UK (900-0233)
Operating Characteristics
Operating and Alarm Characteristics
Function
LED Display
Alarm Sound
Unit Status
Recommendation
Normal
Operation
Green LED
flashes every 30
seconds
None
Normal DC
operation (sensing
no CO) and with
good batteries
None
Carbon
monoxide
alarm
Red LED flashes
with beeps.
Repeating
ON/OFF beeps
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 30 seconds
One quick
beep every
30 seconds
Batteries need to be
replaced
Replace all three AA
batteries
Error /
service
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 condition continues,
unit has malfunc-
tioned. Replace
immediately. Unit will
not respond to CO
Normal
Test/Reset
function
Red LED flashes
with beeps.
Green LED on
Repeating
ON/OFF beeps
Normal operation
when Test/Reset
button is pressed
CO not detected.
Alarm for test
purposes only
End of
unit life
indicator
Red LED flashes
twice every 30
seconds
Two quick
beeps every
30 seconds
End of unit life
Replace unit immedi-
ately. Unit will not
respond to to CO
The following table illustrates the possible digital displays, describes the
audible alarm patterns, and the recommended actions to take.
6. Model KN-COPP-B-LS-UK (900-0230)
(with digital display) Operating Characteristics
When the unit is first powered up, the green Operate LED flashes once
every 30 seconds and the digital display will show three “eights” – indi-
cating the alarm is in the start-up mode. The three “eights” will remain
for approximately 30 seconds. Then, the alarm will display “0” and
begin monitoring the air for CO and will continue to do so as long as it
receives power.
This alarm will display a “0” if CO concentrations between 0 and 30
PPM have been detected within the last 15 seconds.
Operating and Alarm Characteristics
LCD Display Shows
Alarm Sound
Unit Status
Recommendation
A steady display of
CO concentration
from 30-999. Red
LED flashes with beep
Repeating
ON/OFF beeps
Alarm condition.
Dangerous
concentrations of
CO detected
Refer to “What to do
When the Alarm
Sounds” (inside front
cover)
Brief “888” for
approximately 30
seconds
None
Self test when first
powered up
None – CO has not
been detected.
Numbers shown for
test purpose only
A random number
is displayed –
approximately 200
Repeating
ON/OFF beeps
Test/Reset button is
pressed
None – CO has not
been detected.
Numbers shown for
test purpose only
Steady “0”
displayed, dot flash-
ing every 5 seconds,
Green LED flashes every 30 secs.
None
Normal DC
operation with
good batteries
(sensing no CO)
None
“Lb” flashes alter-
nately with any
number, Red LED
flashes every 30 seconds.
One quick beep
every 30 seconds
Batteries need to
be replaced
Replace all three AA
batteries immediately
“Err” displayed
One quick beep
every 30 seconds
Unit is Error condi-
tion
Replace batteries.
If “Err” (or blank
display) continues,
unit has malfunc-
tioned. Replace
immediately. Unit will
not respond CO
Display is blank
Constant alarm
Unit malfunction
Number from 11-
999 displayed.
None
Peak Level Memory
activated. Highest
concentration of
CO detected is dis-
played
Refer to following
section for informa-
tion regarding Peak
Level Memory
“End” displayed.
Red LED flashes twice
every 30 seconds
Two quick beeps
every 30 seconds
End of unit life
Replace unit immedi-
ately. Unit will not
respond to CO.
The problems listed above are under normal operating conditions. Other
“Err” conditions could exist. If you should have any questions regarding
display conditions, call our Consumer Hotline on 01753 685148.
