Ungenaue SOC-Anzeige
Fault — the battery enters fault protection and stops normal operation until the fault is cleared — how it is shown (LED pattern or display code) depends on the model.
Ungenaue SOC-Anzeige — Inaccurate SOC display. Maintenance troubleshooting item (no LCD code).
Cause: The battery's SOC has not been calibrated.
Source: fls48100sg2-datasheet.pdf, p.27
T3 means: Ungenaue SOC-Anzeige. The battery's SOC has not been calibrated.
T3 is a fault code: the battery enters protection and stops normal operation until it is cleared.
The SOC will automatically calibrate after one full charge cycle. First, discharge the battery to 0%, then charge it to 100%.
Prefer the full written guide? Read the complete Felicity inverter error-code guide
Compiled from official Felicity user manuals. Always consult your device manual and a qualified technician before performing repairs.