SMA Solar Technology AG
72
SB50US-80US-IUS094030
Installation Guide
7.1 LED Operation Indicators
Standby (Night)
The inverter is in standby mode because the input voltage is too low for operation.
Initialization
The inverter is initializing. The power from the array is sufficient to initialize control power, but not yet
powerful enough to begin normal operation. Data transmission is not possible during initialization.
Occasionally, during inclement weather or low irradiation, the LEDs may all turn on at once and then
go off again. This indicates that the inverter is trying to initialize but the power available from the array
is not sufficient for normal operation. This is not a malfunction.
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.
All GFDI fuses are disabled in turbine mode.
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