Displays and Messages LED Fault Indicators
7-6 SMA America SB3000US-4000US-11-SE1607
LED Fault Indicators
Ground Fault
Red LED is on
Yellow LED is on
The inverter has detected a ground fault in the PV system and has disconnected from
the grid. The ground fault must be located and fixed before the inverter will resume
normal operation. The inverter will not restart automatically. Refer to
Section 8:
Troubleshooting for information on solving PV array ground faults.
Note: All GFDI faults are disabled in turbine mode.
Cleared GFDI Fuse
Red LED is on
The GFDI fuse located in the fuse holder on the circuit board of the inverter has been
cleared or is not present. This fuse is used to protect the PV system in the event of an
array ground fault. Troubleshoot the PV array for ground faults prior to replacing
this fuse.
CAUTION: For continued protection against the risk of fire,
replace the GFDI fuse with fuses of the same type and rating
only. The Sunny Boy is shipped with a Littelfuse KLKD 1 Amp,
600V AC/DC type fuse.
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