Starting the Inverter

Checking the PV Array DC Voltage

To check the PV array DC voltage:

1.Uncover the PV arrays and expose them to full sunlight. The sunlight must be intense enough to produce the required output voltage.

2.Measure the PV array open circuit DC voltage across the DC positive (+) and negative (–) terminals. This voltage must be greater than 150 volts DC (to energize the electronics) and less than 600 volts DC (to prevent damage to the inverter).

Checking the AC Utility Voltage

To check the AC utility voltage:

1.Switch on the main and inverter breakers in the main electrical service panel.

2.Using an AC voltmeter, measure the AC open circuit utility voltage between L1 and L2. Ensure this voltage is at approximately the nominal value. The inverter operates with a line-to-line voltage (L1 to L2) range around the nominal value.

See “Electrical Specifications”, “Output” on page A–2 for the utility voltage operating range for your GT Inverter model.

Replacing the Wiring/Disconnect Box Cover

After performing the voltage checks, replace all covers that were removed during installation and startup.

WARNING: Shock hazard

Before reattaching covers, turn OFF the breaker switches in the main utility service panel and the DC/AC Disconnect switch on the GT Inverter.

To replace the wiring/disconnect box cover:

1.Ensure the clear plastic insulating barrier is properly positioned in the wiring box.

2.Place the cover in position on the wiring box, being careful not to pinch any wires inside.

3.Ensure that the two screw holes in the bottom of the wiring box cover are aligned with the corresponding holes in the bottom of the wiring box.

4.Replace the two screws removed when the cover was removed (see “Accessing the Wiring Terminals” on page 3–5), and tighten securely.

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