EdwinTheElf Posted May 13, 2011 Share Posted May 13, 2011 I installed an Excel system five years ago and all has been working fine until about a year ago when I started getting intermittent faults. At random points I got (in sequence): - Bell/System Tamper Alarm - ALARM Activated - Bell/System Tamper Restore ...all in the space of less than a second (according to the log via the UDL software) and these events occur whether the alarm is set or not and without anyone touching the system. And whenever the alarm is set the sounder goes off. In 2010 I installed a new Yuasa NP7-12 12v 7Ah battery to replace the original Texecom branded item (installed in 2006) and that appeared to cure the fault. Almost exactly a year to the day the fault came back!! and I do not think the battery is faulty this time (tried charging, it placing a load on it and monitoring the voltage drop). I've been trying to find the problem but no joy - checked for loose connections, voltages, etc. In the process of running the checks I noticed that the strobe on the bell box has stopped working, though I'm not sure if that is a related problem or not. Help! Any constructive suggestions as to what the cause may be or how I can track down the cause please? Link to comment Share on other sites More sharing options...
MrHappy Posted May 13, 2011 Share Posted May 13, 2011 Help! Any constructive suggestions check the voltage , current & resistance readings & check agaist those teken on install Mr Veritas God Link to comment Share on other sites More sharing options...
breff Posted May 13, 2011 Share Posted May 13, 2011 Very diplomatic Mr H, not like you at all The opinions I express are mine and are usually correct! (Except when I'm wrong)(which I'm not) Link to comment Share on other sites More sharing options...
MrHappy Posted May 13, 2011 Share Posted May 13, 2011 Very diplomatic Mr H, not like you at all Yeah I worru my a/c's been hacked.... OP's on other channel too, I posted the same thing a little over a year ago. This time I reckon battery fuse (as a long shot) & by asking for volts amps & ohmmns the fuse will be checked twice w/o looking Mr Veritas God Link to comment Share on other sites More sharing options...
IAS Posted May 14, 2011 Share Posted May 14, 2011 damp bellbox Link to comment Share on other sites More sharing options...
EdwinTheElf Posted May 14, 2011 Author Share Posted May 14, 2011 Mr Happy - your patience with a DIY'er is appreciated (even if it is one year hence and on a different forum!) The current results from the Luxembourg jury are as follows (I'm afraid that I didn't take readings at install; that's what you get from someone who 'thinks' they can install an alarm!) From left to right on the panel: AC - 19.17v Batt - 13.91v (battery gives 12.83v when not connected to the panel) SAB (Odyssey 3) Strb - Initially was fluctuating between 13.05v and 13.10v but when I rechecked everything it read as a steady 13.06v 0v - 0v Tamp - Initially fluctuating 0.85v - 0.90v then 0.74v steady Bell - Initially 12.50v - 12.55v then 12.51v steady +12v - 13.94v steady AUX 12v Connections + - 13.91v - - 0v SW+ - 0.65v Auxilliary Tamper Connections Tamp (Left) - 0.86v Tamp (Right) - 0.86v Keypad T - Fluctuates between 11.34v and 11.94v R - Fluctuates between 11.34v and 11.94v (0v difference between T and R) - - 0v + - 13.91v Zones 1-8 (1-5 & 8 PIRs, 6 door contact, 7 just has an EOL resistor installed at the panel, i.e. not used) Left - 13.75 Right - 9.35 Resistance Aux Tamper - 0.003ohm All fuses are working, including the battery fuse. And that concludes the voting from the Luxembourg jury - Pays de Galles null point! Any other measurements? Link to comment Share on other sites More sharing options...
EdwinTheElf Posted May 14, 2011 Author Share Posted May 14, 2011 Update: SAB voltage fluctuations were caused by SAB being in 'Hold Off', once this is removed then voltages remain stable. Link to comment Share on other sites More sharing options...
magpye Posted May 14, 2011 Share Posted May 14, 2011 Been up and HAD A LOOK INSIDE the SA or EWB as it's supposed to be called now? Someone told me I was ignorant and apathetic, I don't know what that means, nor do I care. Link to comment Share on other sites More sharing options...
IAS Posted May 14, 2011 Share Posted May 14, 2011 Mr Happy - your patience with a DIY'er is appreciated (even if it is one year hence and on a different forum!) Any other measurements? only one that you need was the one not taken - what V between 12v and SAB tamper. save time, it`ll be the switch on the bellbox thats faulty. Link to comment Share on other sites More sharing options...
MrHappy Posted May 14, 2011 Share Posted May 14, 2011 Any other measurements? current, Mr Veritas God Link to comment Share on other sites More sharing options...
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