SMA SB 3800-U - Manual (Page 49)

Displays and Messages
SB3800U-12:SE2006 SMA America 7-1
Section 7:
Displays and Messages
Each Sunny Boy inverter comes equipped with three LED status indicators. (Shown in
Figure 7.1) This allows the user to determine the operating mode of the inverter at a
glance. The basic definitions of the indicator lights are as follows:
The green LED indicates normal operation of the inverter.
The red LED indicates the status of the GFDI fuse, located in the holder on the underside
of the inverter. If this LED is lit, the GFDI fuse has cleared or is not present.
The yellow LED indicates that there is a fault of some kind, either inside the inverter or
somewhere in the PV system. The inverter will not operate until the fault has been
corrected. The different error codes and possible causes are described later in this
section and in Section 8: “Troubleshooting”.
The red and yellow LEDs combined indicate that the inverter has detected a ground
fault. The ground fault must be located and cleared and the inverter reset manually. The
inverter will not restart automatically after detecting a ground fault. The ground fault
may also clear the GFDI fuse.
Note: All GFDI faults are disabled in turbine mode.