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Replacing Parts
975-0131-01-01 6–5
Replacing the Inverter
You can swap out the inverter and replace it with another GT Inverter, leaving the
existing wiring box in place. This means that you do not have to disturb wiring
connections in the wiring box. However, you do have to disconnect wiring
between the inverter and the wiring box.
Figure 6-1
Location of Fuse, Front Panel Cover Removed
Ground Fault
Protection Fuse
LCD
WARNING: Shock hazard
Separating the inverter from the wiring box breaks the ground path between PV
NEGATIVE (–) and earth ground. When the wires between the inverter and wiring box
are disconnected and exposed, both PV leads are floating at the array open circuit voltage.
If there is leakage current from the POSITIVE PV lead to ground at the array, touching the
NEGATIVE PV lead could cause a life-threatening shock even with the disconnect switch
turned off. Ungrounded negative DC current on the PV NEGATIVE (–) wire presents an
extreme shock hazard.
Use insulated tools only when disconnecting wires between the inverter and wiring box.
Cap all disconnected wires with wire nuts.
If possible, cover PV arrays with an opaque material during this procedure.