SMA SUNNY BOY 3000-US Installation Manual page 64

10 Troubleshooting
Position Designation
B Red LED
C Yellow LED
64 SB30-40-US-IA-en-33
Status Explanation
Glowing Tripped ground fuse
Ground fuse was tripped or is not available.
Corrective measures:
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, Grid failure
goes out for 3 s,
This blink code can be caused by any of the
blinks twice
following conditions:
Corrective measures:
• Check the PV plant for ground-faults
(see Section 11.6).
• Grid undervoltage
• Grid overvoltage
• Grid underfrequency
• Grid overfrequency
• Sudden change in the power frequency
or the line voltage
• 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.
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