Operation of the detector

Normal operation
When the unit detects carbon monoxide, it will give the alarm signal continuously. The red alarm light will flash and the buzzer will sound approximately 5 times per second.

When the detector has been in alarm for 30 minutes the alarm signal will be given once every minute.

Hush Feature
It required, the audible alarm can be silenced for 5 minutes by pushing the button marked "Test". The red alarm light will continue to flash 5 times per second.

If carbon monoxide is still present after the 5 minute hush period, the audible alarm will sound.

Note:- The hush facility will not operate at levels above 350ppm carbon monoxide. Al levels below 350ppm the hush facility will only operate once i.e. the audible alarm can only be silenced for one 5 minute period.

Run to normal operation
When the carbon monoxide gas disperses, the alarm signal will stop. The green power lamp will continue to flash approximately once every minute.

Alarm Signal
The carbon monoxide alarm can be distinguished from smoke detector alarms as it signals C.O. in morse code.

Fault Warning
If a fault is detected the buzzer will sound 2 short chirps every minute. The detector must then be replaced.

Battery Fault Warning
The buzzer will sound 1 short chirp every minute.

End of Detector Life Warning
When the unit comes to the end of it's life the buzzer will sound 3 short chirps every minute. The detector must then be replaced.

Note:- With normal use the batteries will last the full 5 years life of the detector. However, battery life will be reduced if either a fault occurs with the battery or the detector remains in alarm for long periods of time.