SMA SB 3800-U - Manual (Page 47)

SB3800U-12:SE2006 SMA America 6-1
Section 6:
Commissioning
WARNING: Follow the steps in the commissioning pro-
cedure in the order they are presented. Deviating from
these procedures could expose you to lethal voltages that
can cause serious injury and/or death.
WARNING: never insert the GFDI fuse into the SB3800U
without the fuse holder base. Lethal voltage may still be
present and electric shock may result.
CAUTION: Follow the steps in the commissioning pro-
cedure in the order they are presented. Deviating from these
procedures could cause irreversible damage to the
SB3800U and void the warranty.
All Sunny Boy inverters have a sophisticated system for detecting and responding to PV
array ground faults as required by NEC Section 690.5. The PV array normally operates
in a grounded configuration. The array’s negative conductor is connected to the
grounding system inside the inverter as a part of the UL1741 Listed ground-fault
detection system. The GFDI protection is active whenever there is sufficient DC voltage
to turn on the LCD in the SB3800U.
To commission the SB3800U, follow these simple instructions:
1. Connect the grid voltage to the SB3800U by switching on the main AC circuit
breaker in the main utility panel.
2. Switch the DC disconnect to the on position. If there is sufficient sunlight available,
the Sunny Boy 3800U will enter the “Wait“ mode at this time and the green LED
will begin to blink.
3. If no AC faults are detected, the “Wait“ mode will end after approximately 20
seconds and the green LED will stop blinking, remain on and the SB3800U will
begin to operate normally. If an AC fault was registered, the SB3800U will wait 5
minutes prior to starting.