Installation and Operation Manual (Rev B)
PVI 10KW, 13KW, 15KW
15
DOCR-060011
5.0 Commissioning the Inverter PV System
Before commissioning, ensure that the inverter is mounted, all connections are made and the
inverter is ready to power up.
NOTE:
Make sure all tools, parts, etc. are removed from the vicinity of the inverter
before turning on.
WARNING:
Make a final check of all AC and DC wiring to the inverter and in the
system before turning on.
NOTE:
With the PV modules connected and inverter disconnect switches still off,
perform a final check of the PV voltage and polarity once more using a digital volt
meter and probing the positive (+) and negative (-) PV connections. Verify clockwise
AC phase rotation for L1, L2, L3 using a phase rotation meter.
5.1
Turning on the Inverter
:
NOTE: IT IS CRITICAL THAT THE SEQUENCE FOR TURNING ON THE INVERTER BE
FOLLOWED EXACTLY
.
•
Turn on the dedicated three-phase circuit breaker or disconnect switch at the building
service.
•
Turn on the inverter’s AC disconnect switch.
•
Turn on the inverter’s DC disconnect switch.
•
Watch the LED indicators for initialization (green and red LEDs on), then a slow blinking
green LED followed by a faster blinking green LED. Watch the LCD display for prompts
and system status.
•
Listen for contactor closing (inverter on-line).
•
Listen for slight 60 Hz hum (transformer on-line).
•
Following the blinking green LED and high frequency switching sound you should see a
solid green LED. This confirms that the inverter is operating normally. The LCD display
will show the AC Power (PAC), Energy (EAC), current and voltage as well as DC voltage.
5.2
Operation
The control electronics will be active as soon as the DC voltage reaches 125VDC. The inverter
will go on-line with the utility three-phase grid when the DC voltage first exceeds 270VDC
(strike voltage). Next, the inverter will load the array, bringing the DC voltage down from
270VDC to not less than 205VDC.
Once there is enough PV power to back feed three-phase AC power, power switching will
automatically feed power to the grid.
