11 Cleaning and Care SMA America, LLC
86 SB30-40-US-IA-en-33 Installation Manual
3. Close the DC Disconnect (see Section 9.4).
4. Commission the inverter (see Section 8).
11.7 Replacing the Ground Fuse
If the red LED glows and the inverter displays the error message "GFDI Fuse Open", the ground fuse
may have been tripped.
Example: Location of the ground-fault
The example shows a ground-fault between the second and third PV modules.
Figure 27: ground-fault in the PV array
Danger to life due to high voltages in the PV plant
Death or serious injury due to electric shock.
• Only insert ground fuses into the inverter using a fuse extractor.
Danger of fire due to incorrectly rated fuse
Risk of injury due to fire.
• Only replace faulty ground fuses with ground fuses of the same type and size.
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