Commissioning Multiple Inverters

Starting up the GT Inverter

To start up the inverter:

1.Switch the DC/AC disconnect switch to the ON position (see Figure 4-1).

2.Check the GT Inverter LCD. The startup screens (see Table 5-1 on page 5–2) should appear for five seconds each, and then the “Reconnecting in sss seconds” special screen (see Table 5-10 on page 5–10) will appear until the 305 second (default value) protection timer countdown is completed.

DC/AC disconnect switch

Figure 4-1DC/AC Disconnect Switch Positions

Commissioning Multiple Inverters

In an installation with multiple GT Inverters, special commissioning procedures must be followed in order to safely determine if any DC wiring problems exist.

Important: Before performing this procedure, all inverters should be off, with the

DC/AC disconnect switch in the OFF position.

To commission multiple inverters:

1.Uncover the PV arrays and/or close the main DC disconnect switch, if one is installed.

2.Start the first inverter by turning the DC/AC disconnect switch to the ON position.

3.Wait for the input current to rise above 1 A.

This information is displayed on the Array Readings screen. To display the Array Readings screen, tap the unit four times.

4.After the input current has risen above 1 A, if the inverter is still operating normally, switch off the inverter by turning the DC/AC disconnect switch to the OFF position. Proceed to step 5.

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