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  1. R

    Siren Problem Yale HSA6400

    I am also having problems with my Yale HSA 6400 siren. Everything worked perfectly after the initial installation. A month after the installation I added 2 PIRs to the system and ever since then the alarm sirens (external and control unit) have stopped working when the alarm is triggered. The...
  2. R

    Yale HSA 6400 Alarm siren not sounding

    I recently installed a Yale HSA 6400 alarm system. Everything worked perfectly until I added 2 additional PIRs for the shed and the garage. Now the external siren and Control Unit siren no long sound when the alarm goes off although the system does still send messages to my mobile phone. The...