Hush feature:
If required, the audible alarm can be silenced for
fi
ve
minutes by pushing the Test button. The red alarm light will continue
to
fl
ash in temp-4 pattern. If carbon monoxide is still present after the
5-minute hush period, the audible alarm will sound. The hush feature
will not operate at levels above 350 ppm (parts per million) carbon mon-
oxide.
Trouble feature:
When the sensor is in a trouble condition. The red LED
blinks once every
fi
ve seconds. Trouble conditions include an open
circuit, sensor removal (tamper), and sensor end of life. See Table 1 for
LED and sounder mode.
End of Life Timer feature:
When the detector has reached the end of its
life, the LED will blink, this indicates that the CO sensor inside the detec-
tor has passed the end of its life and the detector must be replaced. This
detector’s lifespan is approximately six years from the date of manufac-
ture. Refer to Detector Replacement section. See Table 1 above for LED
and sounder mode.
Low Battery Detection:
The CO5-MC(US) is powered by a single 3-volt
CR123A Lithium battery. The red LED of the detector will blink every 45
seconds. After 7 days the detector’s horn will “chirp” about every 45
seconds (red LED continues to blink) for up to 30 days. Pressing the test
button during this time will silence the chirps for 12 hours, if no other
trouble conditions exist. The battery should be replaced BEFORE the
chirps begin. Be sure to replace the battery with a fresh one.
