Operating and Alarm Characteristics
LED Display Shows Alarm Sound Unit Status Recommendation
"---" then "888" 4 quick beeps,
voice message
"Warning, Carbon
Monoxide! ",4
quick beeps.
One time only.
Self checking (Test
button was pressed)
None – CO has not
been detected.
Steady “0”
displayed.
None
Normal AC
operation (sensing
no CO) and with a
good battery
None
An alternating
display of "CO" and
the CO
concentration from
30-999.
4 quick beeps, voice
message "Warning,
Carbon Monoxide!
", 4 quick beeps,
no voice message,
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 followed
by the voice message
"Low Battery!
"
AC powered and
in Low Battery
condition
Replace alarm.
Steady “Err
“displayed
One quick beep
every 30 seconds
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 obtain 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
battery.
6. Operating Characteristics
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 and
Discharge section on the
next page.
An alternating
display of
"PCO" and the CO
concentration (PPM)
None
Unit has detected
100ppm or more CO
Push test/reset button,
check appliances
2549-7201-01_EN.qxp__ 15-6-1 下午1:37 页 13
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