W02Warning

Voltronic inverter error W02

Over temperature

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 KING II TWIN 6KW+14

What it means

Over temperature — Warning code 02 flashing on the display: Over temperature.

Cause: Over temperature.

How to fix it

Check whether the air flow of the unit is blocked or whether the ambient temperature is too high.

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 · +11 more official manuals

Axpert MAX TWIN

InverterWarning

Also applies to:Axpert MAX 8K TWIN PV11KAxpert MAX E TWIN 11KWAxpert MAX E 11K DuplexAxpert MAX 3.6KWAxpert MAX 6.5KWAxpert MAX 7.2KWAxpert MKS III TWIN 6KWAxpert VM II 1.2KVA+11

What it means

Over temperature — Warning code 02 flashing on the display: Over temperature.

Cause: Over temperature.

How to fix it

Return to repair center.

Source: Axpert-MAX-8K-TWIN-Off-grid-manual-20220121.pdf, p.40 · Axpert-MAX-E-TWIN-11K-Off-grid-manual-20220121.pdf, p.41 · Axpert-MAX-E-11K_Duplex_manual.pdf, p.41 · +7 more official manuals

InfiniSolar WP LV 12KW Premium

InverterWarning

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

What it means

Line voltage low loss — Warning code 02 flashing on the display: Line voltage low loss.

Cause: Grid 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: 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 E 5.5KW

InverterWarning

What it means

Internal EEPROM failed — Warning code 02 flashing on the display: Internal EEPROM failed.

Cause: Internal EEPROM failed.

How to fix it

  1. Restart the unit again.
  2. If problem still exists, please contact your installer.
  3. Recharge or replace the battery Try to reduce the applied load Re-connect the battery Check the ventilation around the unit Try to reduce the load Check if fans run normally.

Source: InfiniSolarE-5.5KW-manual.pdf, p.45

InfiniSolar TX-PA 30KW

InverterWarning

What it means

LineHLoss — Warning code 02 flashing on the display: LineHLoss.

Cause: Grid voltage is too high.

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

ESS510

Energy storage systemWarning

What it means

Internal EEPROM failed — Warning code 02 flashing on the display: Internal EEPROM failed..

Cause: Internal EEPROM failed.

How to fix it

  1. Restart the unit again.
  2. If problem still exists, please contact your installer.

Source: ESS510-manual.pdf, p.71

Giant Elite 3P/3P

upsWarning

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

What it means

input phase sequence errors — Warning code 02 flashing on the display: input phase sequence errors.

Cause: input phase sequence errors.

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

Frequently asked questions

What does error W02 mean on a Voltronic inverter?
It depends on the model — 31 devices use code W02. On the Axpert MAX II TWIN it means: Over temperature. The card for each model on this page gives its exact meaning and fix.
Is error W02 a fault or a warning?
W02 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 W02?
Check whether the air flow of the unit is blocked or whether the ambient temperature is too high. The exact steps for each affected model are listed on this page.

Related error codes

Other codes on the Axpert MAX II TWIN

All Axpert MAX II TWIN codes All Axpert MAX II Duplex codes All Axpert MAX II codes All Axpert KING II TWIN codes All Axpert KING codes All Axpert MKS IV TWIN codes All Axpert MKS IV codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert WP TWIN codes All InfiniSolar V II WP codes All ESS-A510 codes All Galleon One 5KL 48V codes

Other codes on the Axpert MAX TWIN

All Axpert MAX TWIN codes All Axpert MAX E TWIN codes All Axpert MAX E Duplex codes All Axpert MAX codes All Axpert MKS III TWIN codes All Axpert VM II codes All Axpert VM II (PF1) codes All Axpert VM III codes All InfiniSolar V II codes All InfiniSolar V II 6KW (Split Phase) codes

Other codes on the InfiniSolar WP LV 12KW Premium

All InfiniSolar WP LV 12KW Premium codes All InfiniSolar 10KW codes All InfiniSolar 15KW codes All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW codes

Other codes on the InfiniSolar E 5.5KW

All InfiniSolar E 5.5KW codes

Other codes on the InfiniSolar TX-PA 30KW

All InfiniSolar TX-PA 30KW codes

Other codes on the ESS510

All ESS510 codes

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