Amps Posted April 23, 2009 Share Posted April 23, 2009 Called out today to an eight zone Sigma CP K fire panel that has a intermittent Earth Fault that can last for a few hours or a few seconds. No zone or sounder fault led's operate just the general fault led. All earth connections have been disconnected but still the fault, any ideas? Could the fault be caused by the mains earth? Link to comment Share on other sites More sharing options...
Guest old-hand Posted April 23, 2009 Share Posted April 23, 2009 All earths? Link to comment Share on other sites More sharing options...
Amps Posted April 23, 2009 Author Share Posted April 23, 2009 All earths? Zone and Sounder. Link to comment Share on other sites More sharing options...
sparky999 Posted April 23, 2009 Share Posted April 23, 2009 Have you disconnected the earth lead from the pcb? - Pete Peter Robinson Freelance M:07889038650 Link to comment Share on other sites More sharing options...
Amps Posted April 23, 2009 Author Share Posted April 23, 2009 Have you disconnected the earth lead from the pcb? - Pete No Link to comment Share on other sites More sharing options...
Chorlton Posted April 23, 2009 Share Posted April 23, 2009 did the same myself, thinking old cable etc etc disconnected and fine since (9 months+) ti's all a learning curve Link to comment Share on other sites More sharing options...
MatonTE1 Posted April 23, 2009 Share Posted April 23, 2009 If it stays up then eliminate by disconnecting field wiring per output/input (sounder/zone) - disconnecting panel earth only removes the panels earth fault reference and hasn't cured the fault.If the panel still shows an earth fault and you have eliminated ALL field wiring (inc. mains supply) then the panel is at fault. The fault is there for a reason. Link to comment Share on other sites More sharing options...
Guest old-hand Posted April 23, 2009 Share Posted April 23, 2009 Back to basics, Quickest way on a small system is to put EOL devices in at panel and prove panel. Then Put each zone/sounder back in one by one. Then you have a reference point. Link to comment Share on other sites More sharing options...
Youngsy Posted April 30, 2009 Share Posted April 30, 2009 Oxo, its intermitant. if its not there your cant find it. Had a similar problem myself on a much bigger scale with a morley Zx5. Link to comment Share on other sites More sharing options...
Guest old-hand Posted April 30, 2009 Share Posted April 30, 2009 Oxo, its intermitant. if its not there your cant find it. Had a similar problem myself on a much bigger scale with a morley Zx5. All I suggested was to prove the panel. Then the fun can start, or do you chase your tail for the first hour Link to comment Share on other sites More sharing options...
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