Maintenance and Troubleshooting
Replacing the Inverter
If your GT Inverter requires servicing, you can replace it with another inverter, leaving the existing wiring box in place. This means that you do not have to disturb wiring connections in the wiring/disconnect box. However, you do have to disconnect wiring between the inverter and the wiring/disconnect box.
WARNING: Shock hazard
• Replacing the inverter according to these procedures should only be performed by qualified service personnel, such as a certified electrician or technician.
•Separating the inverter from the wiring box breaks the ground path between the grounded conductor 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
•Cover PV arrays with an opaque material during this procedure.
•Use insulated tools only when disconnecting wires between the inverter and wiring box. Cap all disconnected wires with wire nuts.
Recommended tools:
•Insulated screwdriver
•Wire nuts
•7 mm socket and small ratchet, or 7 mm open wrench.
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WARNING: Shock hazard
The inverter should only be removed from the wiring box when a replacement inverter is immediately available. When replacing an inverter, ensure the DC/AC Disconnect switch is locked (or otherwise secured) in the OFF position. Do not leave the top of the wiring box exposed for extended periods of time.
WARNING: Shock hazard
Before replacing the inverter, turn OFF the breaker switches in the main utility service panel and the DC/AC Disconnect switch on the GT Inverter. Cover the PV arrays with an opaque material.
To remove the inverter from the wiring box:
1.Turn OFF the breaker switches in the main utility service panel and the DC/AC Disconnect switch on the GT Inverter. Disable the output of the PV arrays by covering them with an opaque material.
2.Remove the wiring/disconnect box cover and the display front panel cover (see Figure