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000841BG
7 - Operation
After the commissioning via ABB Installer for Solar Inverters APP is com-
pleted, the inverter changes the behaviour of the “Power” and “Alarm”
LEDs
08
, in relation of the input voltage value:
Input voltage LED Status Description
Vin < Vstart
Power = Flashing
Alarm = OFF
The input voltage is not sufcient to enable connection to
the grid.
Vin > Vstart
Power = Flashing
Alarm = ON
The input voltage is sufcient to enable connection to the
grid: the inverter waits for the grid voltage to be present to
make the connection to the grid.
The inverter is powered SOLELY by the voltage generated by the photovoltaic generator: the
presence of grid voltage alone is NOT SUFFICIENT for the inverter to switch on.
• When the input voltage is sufcient to allow the connection to the grid,
close the AC switch downstream of the inverter (and AC disconnect switch
09
for the -SX2, -SY2 wiring box version) the thus applying the grid volt-
age to the inverter: the inverter checks the grid voltage, measures the
isolation resistance of the photovoltaic eld with respect to ground and
performs other auto-diagnostic checks. During the preliminary checks on
the parallel connection with the grid, the “Power” LED keeps ashing,
the “Alarm” and “GFI” LEDs are OFF.
• The inverter ONLY creates a parallel connection with the grid if the grid
and isolation resistance parameters fall within the ranges foreseen by
current regulations.
• If the outcome of the preliminary checks on the grid parallel is positive,
the inverter connects to the grid and starts to export power to the grid.
The “Power” LED remains xed on while the “Alarm” and “GFI” LEDs are
OFF.
To address any problems that may occur during the initial stages of operation of the system
and to ensure the inverter remains fully functional, you are advised to check for any rmware
updates in the download area of the website www.abb.com/solarinverters or at https://regi-
stration.abbsolarinverters.com (instructions for registering on the website and updating the
rmware are given in this manual).
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