Installation manual

Starting the Commissioning Test
153396 Revision D 5–3
This manual is for use by qualified installers only
Starting the Commissioning Test
Serial Number
Enter the information required on the form that appears on page B–2 of
Appendix B, “Commissioning Test Record”. The converter serial number is
located on a label placed on the lower-left front of the inverter enclosure door.
Inverter Enclosure
1. Open both doors of the Xantrex GT250 inverter enclosure and inspect the
connections.
2. Check for loose cables, rubbing, or interference.
3. Correct and record any defects.
4. Close the inverter enclosure doors.
Verify AC Voltage
1. Open the left door of the Xantrex GT250 inverter enclosure and verify that the
Grid AC cables have been installed at TB1-A, TB1-B, TB1-C, and
TB1-Neutral within the AC interface.
2. With a voltmeter, verify if AC Grid voltage is present at the bottom of TB1-A,
TB1-B, TB1-C, and TB1-Neutral (480 Vac). These terminals are located in the
AC interface.
3. If grid voltage is not available to the unit, close and lock the Xantrex GT250
inverter enclosure. The Commissioning Test procedure must cease at this
point. Do not attempt to continue the test until each step can be checked
and verified.
Verify DC Voltage
1. Open the right door of the Xantrex GT250 inverter enclosure and verify that
the PV DC cables have been installed correctly within the DC interface.
2. With a voltmeter, verify if PV DC voltage is present at TB3 and TB4.
3. Verify the correct polarity.
4. If the voltage is not present, contact the installer, site electrician or site
operator to supply PV voltage to the unit.
5. If PV DC voltage is not available to the unit, close and lock the Xantrex GT250
inverter enclosure. The Commissioning Test procedure must cease at this point.
Do not attempt to continue the test until each step can be checked and verified.
WARNING : Risk of electric shock, explosion and arc
flash
Before attempting to perform maintenance on the Xantrex GT250, follow the
“Lock-out and Tag-out (De-energize/Isolation Procedure)” on page xiii.