What does error 67 mean on a Voltronic inverter?

67 means: DCDC Buck Fault. Load fluctuates.

Voltronic inverter error 67

DCDC Buck Fault

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

InverterFault

DCDC Buck Fault — Fault code 67 shown on the display with the fault icon on: DCDC Buck Fault.

Cause: Load fluctuates.

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

What does error 67 mean on a Voltronic inverter?: 67 means: DCDC Buck Fault. Load fluctuates.
Is error 67 a fault or a warning?: 67 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 67?: 1. Restart the inverter.

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