What does error 18 mean on a Voltronic inverter?

It depends on the model — 2 devices use code 18. On the InfiniSolar 15KW it means: DSP&MCU protocol incompatibility. The card for each model on this page gives its exact meaning and fix.

How do I clear or fix error 18?

Please contact your installer. The exact steps for each affected model are listed on this page.

Voltronic inverter error 18

DSP&MCU protocol incompatibility

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

The exact meaning depends on your model:

InfiniSolar 15KW

InverterFault

What it means

DSP&MCU protocol incompatibility — Fault code 18 shown on the display with the fault icon on: DSP&MCU protocol incompatibility.

Cause: DSP&MCU FW incompatibility.

How to fix it

Please contact your installer.

Source: InfiniSolar-15K-manual-20200313.pdf, p.52

InfiniSolar TX-PA 30KW

InverterFault

What it means

Mcu&Dsp ver error — Fault code 18 shown on the display with the fault icon on: Mcu&Dsp ver error.

Cause: Firmware version not compatible.

How to fix it

please contact your installer.

Source: InfiniSolar-TX-PA_manual.pdf, p.50

Frequently asked questions

What does error 18 mean on a Voltronic inverter?: It depends on the model — 2 devices use code 18. On the InfiniSolar 15KW it means: DSP&MCU protocol incompatibility. The card for each model on this page gives its exact meaning and fix.
Is error 18 a fault or a warning?: 18 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 18?: Please contact your installer. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the InfiniSolar 15KW

All InfiniSolar 15KW codes

Other codes on the InfiniSolar TX-PA 30KW

All InfiniSolar TX-PA 30KW codes

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