Technical data

PVI 3000/4000/5000/5300 Installation and Operation Manual
28
Fig 2.4.4 Parallel configuration of inverter
3 Commissioning the Inverter and PV System
The inverter is mounted, all connections are made and you are ready to power it up.
NOTE: Make sure all tools; parts, etc. are removed from the vicinity of the inverter before turning on.
WARNING: Make a final check for correctness of all AC and DC wiring to the inverter and in the system.
NOTE: With the PV modules connected and inverter disconnects still off, it is a good precaution to check
PV polarity once more simply by carefully using a 1000V, DC rated digital volt meter and probing the
positive (+) and negative (-) PV connections on the terminal blocks in the wiring box.
Turning on the inverter for the first time:
 STOP! CHECK YOUR WIRING:
WARNING! EXTREME SHOCK AND FIRE HAZARD!
FAILURE TO FOLLOW THE FOLLOWING PROCEDURE CAN RESULT IN SERIOUS SHOCK,
FIRE DAMAGE AND WILL VOID INVERTER WARRANTY!
o REMOVE WIRING BOX COVER
o PV STRING FUSES SHOULD NOT BE INSTALLED AT THIS POINT (If they are installed, STOP!
and see the section “Replacing PV Fuses” in the Maintenance section at the end of this manual)
o CHECK DC VOLTAGES OF ALL STRINGS USING 600V DC METER
 MEASURED VOLTAGES SHOULD BE OPEN CIRCUIT VOLTAGE; IF THE
MEASURED VOLTAGE IS AT OR CLOSE TO 0.0V, THEN STOP! AND RECHECK
YOUR WIRING TO ENSURE THERE IS NOT A DEAD SHORT.
o CHECK DC POLARITY OF ALL STRINGS USING 600V DC METER
 MEASURED VOLTAGES SHOULD INDICATE POSITIVE READINGS WHEN THE
“RED” PROBE OF YOUR METER IS ON THE UNGROUNDED TERMINAL AND THE
“BLACK” PROBE OF YOUR METER IS ON THE GROUNDED TERMINAL (except for
positively grounded systems, in which case see Appendix D at the end of this manual). IF
THE MEASURED VOLTAGES INDICATE A NEGATIVE POLARITY, THEN STOP!
AND RECHECK YOUR WIRING TO ENSURE THE POLARITY OF THE STRINGS IS
CORRECT.
o ONCE THE VOLTAGES AND POLARITIES ARE MEASURED AND CONFIRMED TO BE
CORRECT, INSTALL THE PV STRING FUSES.