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Try installing all new batteries. Latest installs have the individual units also hard wired to each other so that when one goes off the others are triggered. When a battery is weak in unit it often causes the main unit to chirp along with some of the others in sympathy. If still no improvement and all batteries are brand new, then either get new units or disconnect the hard wiring between all units.
They will still work but without the nasty global feature.
Posted on Dec 22, 2016
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Posted on Jan 02, 2017
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