W18Warning

Voltronic inverter error W18

RSD is close

Warning — the red LED flashes and the inverter keeps running. Deal with it before it escalates.

The exact meaning depends on your model:

InfiniSolar WP LV 12KW Premium

InverterWarning

What it means

RSD is close — Warning code 18 flashing on the display: RSD is close.

Cause: RSD is close.

How to fix it

  1. The unit keeps operating.
  2. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolar-WP-LV-12KW-Premium-manual.pdf, p.51

InfiniSolar Super 4KW

InverterWarning

Also applies to:InfiniSolar Plus 5KW

What it means

Inverter cuts off mains output in battery mode — Warning code 18 flashing on the display: Inverter cuts off mains output in battery mode.

Cause: Inverter will cut off mains output and remain power on EMS connector in the battery mode due to low battery.

How to fix it

  1. The unit keeps operating.
  2. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolar-Super-4KW-manual.pdf, p.46 · InfiniSolar-Plus-5KW-manual.pdf, p.50

InfiniSolar TX-PA 30KW

InverterWarning

What it means

Inv0TempOver — Warning code 18 flashing on the display: Inv0TempOver.

Cause: The temperature is too high inside.

How to fix it

  1. The unit keeps operating.
  2. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.

Source: InfiniSolar-TX-PA_manual.pdf, p.49

Frequently asked questions

What does error W18 mean on a Voltronic inverter?
It depends on the model — 4 devices use code W18. On the InfiniSolar WP LV 12KW Premium it means: RSD is close. The card for each model on this page gives its exact meaning and fix.
Is error W18 a fault or a warning?
W18 is a warning: the red LED flashes and the unit keeps running. Fix the underlying condition before it escalates.
How do I clear or fix error W18?
The unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the InfiniSolar WP LV 12KW Premium

All InfiniSolar WP LV 12KW Premium codes

Other codes on the InfiniSolar Super 4KW

All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW 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.