Commissioning
SMA America, LLC
42
SB8-10TL-IUS103811
Installation Guide
7 Commissioning
All Sunny Boy inverters have a sophisticated system for detecting and responding to PV array ground
faults as required by
National Electrical Code
®
section 690.35 (C). The ground fault protection
device is active whenever there is sufficient DC voltage to turn on the LCD in the Sunny Boy.
Check the following requirements before commissioning:
• AC cable correctly connected
• DC cable correctly connected
• securely fastened enclosure lid
• The line circuit breaker is laid out correctly, if used.
Commission the Sunny Boy
1. Make sure any covering placed over the PV array is removed.
2. Connect the grid voltage to the Sunny Boy by switching on the main AC circuit breaker in the
main utility panel.
3. Switch the SMA DC Disconnect to position labeled as ”1”. If there is sufficient sunlight available,
the Sunny Boy will enter the “Wait” mode at this time and the green LED will begin to blink.
☑ If no AC faults are detected, the ”Wait” mode
will end after 10 seconds and the green LED will
stop blinking, remain on and the Sunny Boy will
begin to operate normally. If an AC fault is
registered, the Sunny Boy will wait 5 minutes
prior to starting.
☑ If the Sunny Boy is not operating as expected after the commissioning procedure has been
completed, refer to the user manual.
☑ The meaning of the red LED is described in detail in section 10 ”Troubleshooting”
☑ If there is adequate solar irradiation and the resulting PV input voltage is greater than 360 V
DC, the Sunny Boy will automatically begin feeding power to the utility grid.
DANGER
High voltage is present inside the PV power plant.
Death or serious injury will result when damaging a DC cable or touching a DC conductor.
• Commission the Sunny Boy in the order described in the following procedure.
A
Green LED Operation
B
Red LED
Ground fault
C
Yellow LED Disturbance
