Posted 11th May, 2026 at 10:25 by David Butler
The Fire Angel CO 9B Carbon Monoxide behaviour beep sequence for Fault / End of Life signal:
The unit continuously checks the settings of its sensor and circuitry. If any of these settings are found to be incorrect or if the batteries become low then the detector will emit a single audible chirp once per minute for up to 30 days
For further details please review manual at below weblink
