Troubleshooting
Ground Fault Protection
WARNING: Shock hazard
Troubleshooting a grounding fault should be performed by qualified personnel, such as a certified electrician or technician.
Ground fault protection is required when using either solar or wind renewable energy input. Figure
When a grounding fault is detected, the ground fault protection fuse will blow. The system must be shut down completely, the fault corrected, the fuse replaced (see “Replacing the Ground Fault Protection Fuse”) and then the system restarted.
Replacing the Ground Fault Protection Fuse
WARNING: Energy and fire hazard
For continued protection against risk of fire, replace the ground fault protection fuse only with the same type and ratings of fuse.
WARNING: Shock hazard
After disconnection both AC and DC power for the the system, wait five minutes before attempting any maintenance or cleaning or working on any circuits connected to the inverter. Internal capacitors remain charged for five minutes after disconnecting all sources of power.
The ground fault protection fuse will blow when severe leakage occurs between the PV array and earth ground, or when the system has been installed with faulty DC wiring. Before replacing the fuse, it is important to have qualified service personnel, such as a certified electrician or technician, to determine the cause of the ground fault.
To replace the ground fault protection fuse:
1.Remove the five Phillips screws on the top of the inverter and lift off the panel to expose the terminals, as shown in Figure
2.Locate the PV ground fault protection fuse.
3.Using a slot blade screwdriver, remove the blown fuse and replace it with a new Littelfuse 5mm×20mm fuse rated 1A 250 Vac slow blow (or equivalent).
