Commissioning
SMA America, LLC
64
SB20_25_30HFUS-eng-IUS113711
Installation Guide
Display messages during initialization
• First, the firmware version of the internal processors
appears in the text lines.
• After 5 seconds or after tapping the enclosure lid
the serial number or the identifier of the inverter
appears. This identifier can be changed with a
communications device.
• After another 5 seconds, or when you tap again,
the configured standard and the grid type are
displayed.
• After another 5 seconds, or when you tap again,
the configured language is displayed.
• In normal operation the scrolling lines are
subsequently empty. You can refer to the possible
event messages in the scrolling lines and their
meaning in section 10 ”Messages” (page 82).
If there is a ground fault in the array before DC is switched on, the messages ”Insulation
Failure” and ”Check Generator” will be displayed in turns and the GFDI fuse may clear.
If there is a ground fault in the array while DC is switched on, the messages ”Ground Fuse
Fault” and ”Check Ground Fuse” will be displayed in turns.
• If these error messages are encountered, switch off the DC and AC disconnects to
the Sunny Boy and troubleshoot the array.
Refer to section "Checking the PV array for Ground Fault" on page 88.
If the Sunny Boy is not operating as expected after the commissioning procedure has been
completed, refer to Section 10 ”Messages” (page 82) and to
section 11 ”Troubleshooting” (page 88).
If there is adequate sun irradiation and the resulting PV input voltage is greater than
220 V DC, the Sunny Boy will automatically begin feeding power to the power distribution
grid.
Anytime the AC power is disconnected from the inverter, either manually or as a result of
an AC disturbance, the inverter will wait 5 minutes after the AC power has been restored
to reconnect. When servicing the inverter, always disconnect the AC first, then switch off
the DC-Disconnect.
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