6. Model 8LLDCO (with digital display)
Operating
Characteristics
r
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 and
during Test/Reset.
None – CO has
not been detected.
Numbers shown for
test purpose only
Test sequence
indication.
4 quick beeps,
5 seconds
silence,
repeated once
Test/Reset button is
pressed
None – CO has
not been detected,
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
If unit is cold, allow to
warm up above 20°C. If
the unit is at room tem-
perature and is beeping/
flashing every 60 seconds
the unit needs to be
replaced.
“Err” displayed
One quick beep
every 30 seconds
Unit is Error con-
dition
Press and hold the test
button for 5 seconds to
perform a reset. If unit
continues to beep or
alarm, using a screwdriver
slide the switch on the
back of the unit up to the
shut down position.
Unit will not respond
to CO.
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 Consumer Hotline.
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