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  1. J

    Yale HSA6400 Siren issues - going off when not set/armed

    Hi, My Yale HSA6400 system has been installed for around 6 months and working fine. The last couple of weeks the siren has been sounding when the system is not armed. It then will not disarm when our code is entered. There is a slight 0.5 second break once the unarming code is entered but then...
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