Installation Guide

Commissioning

900-0160-01-01 Rev B 51

4. Using a DVM, verify 120 Vac (or appropriate voltage) between the master inverter’s L1 and N

OUT terminals, and between the L2 and N OUT terminals. The inverter is working correctly if the

output reads within 10% of 120 Vac or the programmed output voltage. If necessary, confirm

appropriate voltages from one unit to the next.

5. When this test is finished, return the master to its previous settings.

After output testing is completed, perform the following steps:

6. Close the AC output circuit breakers. If AC bypass switches are present, place them in the

normal (non-bypass) position. Do not connect an AC input source or close any AC

input circuits.

7. Use a high-resolution voltmeter to verify correct voltage at the AC load panel.

8. Connect a small AC load and test for proper functionality.

9. Close the AC input circuit breakers and connect an AC source.



Using a high-resolution voltmeter on the correct input, check all

, and

input terminals for 120

Vac and 240 Vac (or appropriate voltage) from the AC source.



If a system display is present, confirm that the inverter accepts the AC source as appropriate for its

programming. (Some modes or functions may restrict connection with the source. If one of these

selections has been used for the system, it may not connect.) Check the system display indicators

for correct performance.

10. If the charger is activated, the inverter will perform a battery charging cycle after powering up.

This can take several hours. If restarted after a temporary shutdown, the inverter may skip most

or all of the charging cycle. With the system display, confirm that it is charging as appropriate.

11. Test other functions which have been enabled, such as generator start or search mode.

12. Compare the voltmeter’s readings with the system display meter readings. If necessary, the

system display’s readings can be calibrated to match the voltmeter more accurately.

Calibrated settings include AC input voltage for the GRID and GEN inputs, AC output voltage,

and battery voltage.

Powering Down

If steps are inapplicable, they can be omitted. However, it is recommended that all

applicable

steps

be performed in the following order. These steps will completely isolate the inverter.

To remove power from the system:

1. Turn off all load circuits and AC input sources.

2. Turn off all renewable energy circuits.

3. Turn each inverter OFF using the system display or external switch.

4. Turn off the main DC overcurrent devices for each inverter.

Adding New Devices

When adding new devices to the system, first turn off the system according to the preceding

instructions. After adding new devices, perform another functional test, including programming.