5 Troubleshooting SMA America, LLC
30 SB30-40-BA-eng-BUS121010 User Manual
5.3.3 Resetting "Error AFCI"
If the yellow LED is permanently glowing and the message "Error AFCI" is displayed, an electric arc
has been detected in the PV system. The AFCI has been triggered and operation of the inverter is
permanently inhibited.
1. Turn the rotary switch of the DC Disconnect to the
Off position.
2. Wait until the display and all LEDs switch off.
3. Turn the rotary switch of the DC Disconnect to the
On position.
☑ The message "Error AFCI. Knock to reset." is displayed.
✖ The message "Error AFCI. Knock to reset." is not displayed.
Possible error cause: The disturbance was not remedied.
• Contact installer.
4. If the message "Error AFCI. Knock to reset." is displayed, tap the enclosure lid within 10 s.
☑ The inverter starts up.
✖ The inverter does not start up.
Possible error cause: You did not tap the enclosure lid within 10 s of the message appearing.
• Repeat steps 1 to 3.
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