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Eric MirandaJul 26, 2025
Why is the red LED continuously on my SMA SUNNY MINI CENTRAL 6000TL Inverter?
- CCalvin ButlerJul 26, 2025
If the red LED on your SMA Inverter stays on, it could be due to a ground fault in the PV generator or a defective varistor. First, disconnect the Sunny Mini Central from both DC and AC connections. Then, measure the voltages between the plus and minus pole of a string against the ground potential. The installer of the PV generator must fix the ground fault in the affected string before reconnecting it to the Sunny Mini Central. Restart the Sunny Mini Central without reconnecting the faulty string. Finally, check the varistors.
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