Posted By Ron Hunter You must introduce an interim alternative method for raising the alarm! e.g. sufficient staff with air horns (from Halfords or similar) operated in 'cascade' fashion, sufficient to ensure the entire building is evacuated.

Posted By Fred Pratley Had this problem and presumably your patroling officer has an immediate means of communication (loan them your mobile or rent radios). the only procedure addition I would make is that the officer reports any suspicions he has before proceeding into any potential danger area, and then has to report within an agreed time that he is OK (or keep the phone on while investigating). Likely cuase of the problem is ladders against cables - window cleaning/contractors installing equipment/ sparkies removing adjacent cables and cracking time embrittled alarm cables/ roof works or screws through cables to name but a few. Good luck, Fred

Posted By Graeme Millar Hello folks first post. Going by what you say and that when the fire system is activated-do you mean powered up? If so and it's going straight into alarm,the first thing i would check to see if you gave a broken mcp glass. If it is taking a bit longer then a contaminated detector is likely.If your company is struggling to locate it,try all voids above false ceilings and in attics. I think personally to remove all detectors is a bit o.t.t. Is this a single zone non-addressable fire panel?