SMA SB 5000-US - Manual (Page 60)

Commissioning SMA America, LLC
60 SB50US-80US-IA-en-37 Installation Manual
The Message "Disturbance AFCI" Is Displayed
An electric arc occurred in the PV system. The yellow LED is continuously lit up. The AFCI has been
triggered and operation of the Sunny Boy is permanently inhibited.
1. Turn the DC disconnect to position "0".
☑ Wait for the display to go out.
2. Perform troubleshooting in the PV system:
Check all PV strings for the correct open-circuit voltage.
3. After the fault is rectified, restart the Sunny Boy: Turn
the DC disconnect to position "1".
☑ The Sunny Box starts and performs another
AFCI self-test.
4. If the following message appears on the display, knock on the enclosure lid: "Electric arc
detected — Knock to restart."
CAUTION
Danger of fire from electric arc
• Only test the AFCI for false triggering in the order described below.
• Do not deactivate the AFCI permanently.
The message "Error AFCI. Knock to reset." appears for only 10 seconds. After
this, it is no longer possible to restart the unit by knocking on the enclosure lid.
• To restart the system, repeat step 1 to step 3.
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