Displays and Messages LED Fault Indicators
SB3000US-4000US-11-SE1607 SMA America 7-7
Control System Fault
Yellow LED is
permanently on
The yellow LED remains lit.
The Sunny Boy has detected a fault within the internal monitoring systems. When the
inverter detects a fault of this kind it will no longer connect to the utility grid. To
correct this, the inverter must be serviced by a qualified service technician. Contact
SMA America for assistance.
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