W21Warning

Voltronic inverter error W21

BatSCRTempOver

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

The exact meaning depends on your model:

InfiniSolar TX-PA 30KW

InverterWarning

What it means

BatSCRTempOver — Warning code 21 flashing on the display: BatSCRTempOver.

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

DC Converter 3KW

InverterWarning

What it means

Battery voltage is too low — Warning code 21 flashing on the display: Battery voltage is too low..

Cause: Battery voltage is too low.

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: DC-converter-3KW-manual.pdf, p.20

Galleon II 6K-10K

upsWarning

Also applies to:Galleon II 6KGalleon II 10K

What it means

Line situations are different in parallel system — Warning code 21 flashing on the display: Line situations are different in parallel system.

Cause: Line situations are different in parallel system.

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: GalleonII-6-10K-Tower-RT-manual.pdf, p.29

Frequently asked questions

What does error W21 mean on a Voltronic inverter?
It depends on the model — 3 devices use code W21. On the InfiniSolar TX-PA 30KW it means: BatSCRTempOver. The card for each model on this page gives its exact meaning and fix.
Is error W21 a fault or a warning?
W21 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 W21?
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 TX-PA 30KW

All InfiniSolar TX-PA 30KW codes

Other codes on the DC Converter 3KW

All DC Converter 3KW codes

Other codes on the Galleon II 6K-10K

All Galleon II 6K-10K codes

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