To troubleshoot a ground fault, identify the condition by the flashing yellow Ground Fault LED, which indicates zero impedance from the FACP to ground (Page 129) [1].
Verify the cabinet grounding stud is connected to a solid building earth ground (Page 31) [1].
Ensure the AC mains ground wire is the first cable installed on the grounding stud, positioned closest to the backbox (Page 33) [1].
Systematically disconnect field wiring (SLC, NACs, etc.) to isolate which circuit is causing the fault. 4. Check the status of jumper JP7; removing this jumper disables ground fault detection, but it requires AHJ approval (Page 10) [1].
