What does error 48 mean on a Voltronic inverter?

48 means: Inv Temp Over. The temperature is too high inside.

How do I clear or fix error 48?

1. Check the ambient temperature and fans.

Inv Temp Over

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

InverterFault

Inv Temp Over — Fault code 48 shown on the display with the fault icon on: Inv Temp Over.

Cause: The temperature is too high inside.

Source: InfiniSolar-TX-PA_manual.pdf, p.51

What does error 48 mean on a Voltronic inverter?: 48 means: Inv Temp Over. The temperature is too high inside.
Is error 48 a fault or a warning?: 48 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 48?: 1. Check the ambient temperature and fans.

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