NOTE: Although this device is self-diagnostic, it is recommended that you self-test the CO
sensor once a month to ensure that the alarm is functioning properly.
Mute function
In alarm state, if the concentration is lower than 50PPM, press the TEST / RESET button, the
device will enter the alarm silence mode, the red (Alarm) LED and green (Power) LED will
flash once every 10 seconds.
While the carbon monoxide concentration is still only 30ppm, the mute mode ends and the
alarm goes into standby without alarm.
When the concentration rises and reaches the appropriate level, the device will re-enter
alarm mode.
Alarm memory function
After pressing the TEST button, the device will show the highest carbon monoxide
concentration point of the last alarm condition.
Low battery signal
When the device detects that the battery voltage is low and a replacement is required, the yellow
(Fault) LED will flash approximately once every 47 seconds and the BEEP alarm will sound.
When the battery voltage continues to decline, the low voltage indication cycle will shorten to 12
seconds.
NOTE: Normal battery standby time is minimum 3 years. Replace the battery in good time after
the low voltage (low battery) alarm sounds. It is recommended to use the same type of battery
as recommended.
Error signal
If a sensor failure is detected, it will emit 5 beeps every 30 seconds and the yellow (Fault) LED
will blink 5 times.
End of life warning
The service life of the product is 10 years. 10 years after the first start-up, the product will emit
two beeps and the yellow (Fault) LED will flash twice every 60 seconds.
Device maintenance
To keep the sensor in good condition:
Test the alarm at least once a month by pressing the TEST button.
Clean the CO sensor regularly to prevent dust build-up. This can be done once a month with
a vacuum cleaner with a brush. Gently clean around the vents.
Never use cleaning agents. Just wipe with a damp cloth.