10 Troubleshooting SMA America, LLC
64 SB30-40-US-IA-en-33 Installation Manual
B Red LED Glowing Tripped ground fuse
Ground fuse was tripped or is not available.
Corrective measures:
• Check the PV plant for ground-faults
(see Section 11.6).
C Yellow LED Glowing Control System Fault
The operation of the inverter is permanently
inhibited. The inverter no longer feeds into the
power distribution grid.
Blinking AFCI self-test
The inverter is carrying out the AFCI self-test.
Glows for 5 s,
goes out for 3 s,
blinks twice
Grid failure
This blink code can be caused by any of the
following conditions:
• Grid undervoltage
•Grid overvoltage
• Grid underfrequency
• Grid overfrequency
• Sudden change in the power frequency
or the line voltage
Corrective measures:
• Monitor the status of the power
distribution grid at the AC connecting
terminal plate of the DC Disconnect and
the AC miniature circuit-breaker
between the inverter and the power
distribution grid.
Position Designation Status Explanation
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