![]() ![]() The ground can be on a panel circuit board. These can wander in and out at the panel as the corrosion conducts more or less current. Rusted or corroded terminals and wiring can also cause a high resistance ground fault. They should be placed at the location where the outside wiring enters the building.Īnywhere there is a leak in the building or condensation near a fire alarm device. These can develop leakage and cause ground faults. A high resistance ground.Ī PIV or any other outside wiring should have a transient suppressor to protect the system from nearby lightning activity. These types of damage can cause a ground that is not a short but is near the fire alarm panel’s threshold to report a ground fault. ![]() The wiring at the PIV can be damaged by lawn mowers and other landscape tools. These are outside so the conduit to them can get full of water. Post Indicator Valve (PIV) for the sprinkler system. Here are a few other places to look for intermittent ground faults. First of all before we start helping you, is this panel installed in a real life safety system in a building, or is it a hobby/testing panel? Being installed in a building brings about a challenge in trouble shooting this type of fault, in addition to other obvious issues such as certifications and liability of people working on the system. If the LED is flashing intermittently and seemingly without reason… things don’t bode well for the panel. I know you mentioned that you disabled the signaling circuits, but this still leaves the zones and other connections that the panel monitors. If it is flashing at the 20 per minute Trouble rate, then the problem is most likely a simple ground fault that has developed within the field wiring. It turns off when the ground fault is cleared. The Ground Fault LED flashes amber at the trouble flash rate when the Ground Fault Detector detects a groundįault on any field wiring. #Mirtone fire alarm manual manual#Does the ground fault light flash intermittently, or at a steady rate? From the Manual available here: ![]()
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