Ground fault detect capability is available only on firmware versions 6.10 or higher. Ground Fault is defined as “a circuit impedance to Earth Ground of approximately 95 kilohms or less.”
The panel detects a ground fault on Terminals 1 to 9 and Terminals 11 to 32 if the Ground Fault Detect Enable jumper (S4) is locked (closed) and a nonzero value is entered in Area 5 Silent Alarm Relay. See D9412G/D7412G Program Entry Guide.
When the jumper is in the unlocked (open) position, the panel does not detect ground fault conditions.
If a ground fault condition occurs, the command centers display SERVC GND FAULT and the panel transmits a Trouble Report Ground Fault Area (Modem IIIa2 format only). For the panel to detect a ground fault condition, the panel must see the ground fault for a minimum of 30 consecutive seconds. When the panel recognizes the ground fault condition is corrected, a Restoral Report is sent. For the restoral condition to be met, the ground fault must be corrected for between 5 and 45 consecutive seconds
