Maintenance and Troubleshooting
Replacing the Ground Fault Protection Fuse
WARNING: Shock and fire hazard
Fuses should only be replaced by qualified service personnel. For continued protection against risk of fire, replace only with same type and ratings of fuse.
WARNING: Shock hazard
After disconnecting both AC and DC power from the GT Inverter, 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.
WARNING: Shock hazard
Dangerous voltages can exist inside the inverter. If there is leakage current from the POSITIVE PV lead to ground at the array, touching the NEGATIVE PV lead could cause a
When the fuse has blown due to a fault, incorrect handling can be
If possible, cover PV arrays with an opaque material during this procedure.
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 wiring. Before replacing the fuse, it is important to have qualified service personnel determine the cause of the ground fault.
To replace a ground fault protection fuse:
1.Remove the wiring box and front panel covers (described on page
2.Using an insulated fuse puller, remove the blown fuse and replace it with a new AC/DC midget cartridge, rated 600 Vdc, 1A (Littelfuse KLKD 1 or equivalent).
3.Replace the front panel and wiring box covers (described on page
