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Honeywell Access Systems OP30HON OP30HONR OmniProx HID Compatible, Mullion Reader (Replaces OMNI30, OP30SNA, 5365BGP00) - Page 3 Questions & Answers
It showes me on the xls60e fire panel ardesseble
An "earth fault" or ground fault is a condition where one of your circuits is grounded or shorted to earth. While all fire alarm systems are normally grounded for circuit board overload protection and personal safety issues, all circuits (bell circuit, smoke detector/heat detector/pull station circuits) should be free of earth grounds. I would suggest if you are not knowledgeable enough to troubleshoot your system you should contact a security/fire alarm installation company to fix the problem. If this is not a viable solution and you want to attempt this on your own try removing each circuit from the panel one at a time. While this will certainly cause additional system troubles, when you remove the circuit causing the earth fault the condition will disappear. You will then need to check all wiring, spice points and devices on that circuit to determine the faulted location.
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