User Guide
6. Model KN-COPP-B-LPM (with digital display) 
 Operating Characteristics
The following table illustrates the possible digital displays, describes the 
audible alarm patterns, and the recommended actions to take.
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
4 quick beeps,
5 secs. silence,
repeating 
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
three “---” and 
then “888”.
4 quick beeps,
5 seconds 
silence,
repeated once 
Test/Reset button is 
pressed
None – CO has 
not been detected. 
Numbers shown for 
test purpose only
Steady “0” displayed, 
dot flashing 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 60 seconds. 
One quick beep 
every 60 seconds
Batteries need to 
be replaced
Replace all three AA 
batteries immediately
“Err” displayed One quick beep 
every 30 seconds
Unit is Error con-
dition
Replace batteries. If “Err” 
continues, unit has mal-
functioned and must be 
replaced immediately. Unit 
will not respond to CO. 
Press the Peak Level button 
while unit is in “Err” mode 
to obtain error code and 
call Product Support line. 
Display is blank Constant alarm Unit malfunction
Number from 
11-999 displayed. 
None Peak Level Memory 
activated. Highest 
concentration of 
CO detected is 
displayed
Refer to following 
section for informa-
tion regarding Peak 
Level Memory
“End” displayed. 
Red LED flashes 
two times 
every 30 seconds
Two quick 
beeps every 
30 seconds
End of unit life Replace unit imme-
diately. 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 Product Support Line. 
2529-7209-01(21008094C).indd 152529-7209-01(21008094C).indd 15 13-3-12 上午11:5613-3-12 上午11:56










