Installation Guide

POWER
GREEN LED
CO
RED LED
AUDIBLE & VISUAL SIGNALS
GAS
BLUE LED
HORN
OPERATIONAL SUMMARY
CONDITION / RECOMMENDATION
* During 120 Volt Operation: On and Blinks Off approx every 20 seconds.
During 9 Volt (DC Backup) operation: Blinks On approx every 40 seconds
3 chirps
approx every
40 seconds
* See below Off
Condition: Sensor Trouble/End-of-Life/Service Alarm.
Recommendation: Reset the alarm. If this does not clear
the problem, replace the alarm.
Off
2 chirps
approx
every 20
seconds
* See below Off Condition: End-of-Service Life Alarm.
Recommendation: Replace the alarm.
Off
1 chirp
approx every
40 seconds
* See below Off Off Condition: Low Battery
Recommendation: Check to make sure the battery
activation pull tab has been completely removed, battery
polarity is correct and the battery terminals are making
contact with the alarm contacts in the battery compartment.
If chirp continues, replace the 9V battery (see User's
Manual for recommended battery types).
RECOMMENDED PLACEMENT:
NOTE: For any location, make sure no door or other obstruction could prevent the carbon
monoxide or gas from reaching the alarm.
Previous
CO alarm or
Previous
Gas alarm
or both
* See below _
_
Condition: Alarm needs to be reset due to abnormal
operation/previous alarms.
Recommendation: Press the TEST/SILENCE or
PEAK/RESET button for approx. 10 seconds. The alarm
will chirp once to indicate the reset is now complete.
Release button. This will clear the alarm LED's and clear
the Silence mode.
MCND401 and MCND601 Series only: To reset the peak
CO memory, press and hold the PEAK/RESET button for
approx. 10 seconds until the peak level is cleared. The
alarm will chirp once to indicate the reset is now
complete. The display screen will display "000" when the
peak CO level is reset and then return to "- - -."