User Manual

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-SS 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.