What does error 63 mean on a Voltronic inverter?

63 means: T Inv Cur FW Over. Surge.

Voltronic inverter error 63

T Inv Cur FW Over

Fault — the inverter cuts its output and the red LED stays solid until the fault is cleared.

InverterFault

T Inv Cur FW Over — Fault code 63 shown on the display with the fault icon on: T Inv Cur FW Over.

Cause: Surge.

Source: InfiniSolar-TX-PA_manual.pdf, p.52

What does error 63 mean on a Voltronic inverter?: 63 means: T Inv Cur FW Over. Surge.
Is error 63 a fault or a warning?: 63 is a fault code: the inverter cuts its output and the red LED stays solid until it is cleared.
How do I clear or fix error 63?: 1. Restart the inverter.

Compiled from official Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.