What does error W01 mean on a Voltronic inverter?

It depends on the model — 38 devices use code W01. On the Axpert MAX II TWIN it means: Fan is locked when inverter is on. The card for each model on this page gives its exact meaning and fix.

Is error W01 a fault or a warning?

W01 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 W01?

Replace the fan. The exact steps for each affected model are listed on this page.

W01

Voltronic inverter error W01

Fan is locked when inverter is on

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

The exact meaning depends on your model:

Axpert MAX II TWIN

InverterWarning

Also applies to:Axpert MAX II TWIN 8KWAxpert MAX II TWIN 11KWAxpert MAX II TWIN 12KWAxpert MAX II Duplex 8KWAxpert MAX II Duplex 11KWAxpert MAX II 8KWAxpert MAX II 11KWAxpert MAX 8K TWIN PV11K+32

What it means

Fan is locked when inverter is on

Cause: Fan is locked when inverter is on.

How to fix it

Replace the fan.

Source: Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.48 · Axpert-MAXII-11K-TWIN-Off-grid-manual.pdf, p.48 · Axpert-MAXII-8K-Duplex-Off-grid-manual.pdf, p.45 · +21 more official manuals

InfiniSolar V II

InverterWarning

Also applies to:InfiniSolar V II 2KWInfiniSolar V II 3KWInfiniSolar V II 5KWInfiniSolar V II 1.5KWInfiniSolar V II 2P 6KWInfiniSolar V II WP 2KWInfiniSolar V II WP 3KWInfiniSolar V II WP 5KW+5

What it means

Fan locked — Warning code 01 flashing on the display: Fan locked.

Cause: Fan locked.

How to fix it

Replace the fan.

Source: InfiniSolarVII_2KW-3KW-5KW_manual.pdf, p.25 · InfiniSolarVII_1.5KW_manual.pdf, p.26 · InfiniSolar-VII-2P-6KW-manual-20201207.pdf, p.29 · +2 more official manuals

InfiniSolar WP LV 12KW Premium

InverterWarning

Also applies to:InfiniSolar 10KWInfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KW

What it means

Line voltage high loss — Warning code 01 flashing on the display: Line voltage high loss.

Cause: Grid voltage is too high.

How to fix it

The unit keeps operating.
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-10KW-manual-20191126.pdf, p.49 · InfiniSolar-15K-manual-20200313.pdf, p.50 · +2 more official manuals

InfiniSolar TX-PA 30KW

InverterWarning

What it means

BatOpen — Warning code 01 flashing on the display: BatOpen.

Cause: Battery is unconnected or too low.

How to fix it

The unit keeps operating.
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

Galleon II 6K-10K

upsWarning

Also applies to:Galleon II 6KGalleon II 10KGiant Elite 1P/1P 6K-10K

What it means

Battery unconnected — Warning code 01 flashing on the display: Battery unconnected.

Cause: Battery unconnected.

How to fix it

The unit keeps operating.
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 · Giant-Elite-1P-1P_manual.pdf, p.26

Galleon One 5KL 48V

upsWarning

What it means

Fan is locked when UPS is on — Warning code 01 flashing on the display: Fan is locked when UPS is on.. Audible alarm: beep three times every second.

Cause: Fan is locked when UPS is on.

How to fix it

Replace the fan.

Source: GalleonOne-5KL-48V-manual.pdf, p.22

Galleon X9 6K-10K RT

upsWarning

Also applies to:Galleon X9 6K RTGalleon X9 10K RT

What it means

Batt Open — Warning code 01 flashing on the display: Batt Open.

Cause: 1) The battery is not connected well; 2) The battery protection device is open.

How to fix it

Connect the battery well
Replace or restore the protection device.

Source: Galleon-X9-6-10K-RT_manual.pdf, p.27

Giant Elite 3P/3P

upsWarning

Also applies to:Giant Elite 3P/3P 10K-40KVA

What it means

battery open — Warning code 01 flashing on the display: battery open.

Cause: battery open.

How to fix it

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

Source: Giant-Elite-3P3P-manual.pdf, p.41

Frequently asked questions

What does error W01 mean on a Voltronic inverter?: It depends on the model — 38 devices use code W01. On the Axpert MAX II TWIN it means: Fan is locked when inverter is on. The card for each model on this page gives its exact meaning and fix.
Is error W01 a fault or a warning?: W01 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 W01?: Replace the fan. The exact steps for each affected model are listed on this page.

Related error codes

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

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Frequently asked questions

Related error codes

Other codes on the Axpert MAX II TWIN

Other codes on the InfiniSolar V II

Other codes on the InfiniSolar WP LV 12KW Premium

Other codes on the InfiniSolar TX-PA 30KW

Other codes on the Galleon II 6K-10K

Other codes on the Galleon One 5KL 48V