03Fault

Voltronic inverter error 03

Battery voltage is too high

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

The exact meaning depends on your model:

Axpert MAX II TWIN

InverterFault

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+46

What it means

Battery voltage is too high

Cause: Battery is over-charged.

How to fix it

Return to repair center.

Source: Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.47 · Axpert-MAXII-8K-TWIN-Off-grid-manual.pdf, p.55 · Axpert-MAXII-11K-TWIN-Off-grid-manual.pdf, p.47 · +57 more official manuals

InfiniSolar WP LV 12KW Premium

InverterFault

What it means

BUS soft start time out — Fault code 03 shown on the display with the fault icon on: BUS soft start time out.

Cause: BUS soft start time out.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

Source: InfiniSolar-WP-LV-12KW-Premium-manual.pdf, p.52

InfiniSolar 10KW

InverterFault

Also applies to:InfiniSolar 15KWInfiniSolar Super 4KWInfiniSolar Plus 5KWInfiniSolar TX-PA 30KW

What it means

BUS soft start time out — Fault code 03 shown on the display with the fault icon on: BUS soft start time out.

Cause: Internal components failed.

How to fix it

Please contact your installer.

Source: InfiniSolar-10KW-manual-20191126.pdf, p.50 · InfiniSolar-15K-manual-20200313.pdf, p.51 · InfiniSolar-Super-4KW-manual.pdf, p.47 · +2 more official manuals

InfiniSolar E 5.5KW

InverterFault

What it means

DC bus voltage soft-start is time-out — Fault code 03 shown on the display with the fault icon on: DC bus voltage soft-start is time-out.

Cause: DC bus voltage soft-start is time-out.

How to fix it

  1. Disconnect AC circuit breaker first.
  2. Then, disconnect DC circuit breaker.
  3. Until LCD screen completely shuts down, turn on DC breaker first.
  4. It will show "No Utility" in LCD screen.
  5. Then, turn on AC breaker.
  6. After 300 seconds, the system will automatically connect to the grid.
  7. If the error message still remains, please contact your installer.
  8. The internal temperature is higher than specified temperature.
  9. Leave inverter to cool down to room temperature.
  10. If the error message still remains, please contact your installer.
  11. Check if the open circuit voltage of PV modules is higher than 500VDC.
  12. If PV open circuit voltage is less than 500VDC and the error message remains, pelase contact your installer.
  13. Turn off the inverter.
  14. Then, restart the inverter.
  15. If the error message still remains, please contact your installer.
  16. The ground voltage is too high.
  17. Please disconnect AC breaker first and then DC breaker.
  18. Check if grounding is connected properly after LCD screen.

Source: InfiniSolarE-5.5KW-manual.pdf, p.43

InfiniSolar 2KW/3KW

InverterFault

Also applies to:InfiniSolar 2KWInfiniSolar 3KW

What it means

DC bust voltage soft-start is time-out — Fault code 03 shown on the display with the fault icon on: DC bust voltage soft-start is time-out.

Cause: DC bust voltage soft-start is time-out.

How to fix it

  1. Disconnect AC circuit breaker first. Then, disconnect DC circuit breaker
  2. Until LCD screen completely shuts down, turn on DC breaker first. It will show "No Utility" in LCD screen. Then, turn on AC breaker. After 300 seconds, the system will automatically connect to the grid
  3. If the error message still remains, please contact your installer.

Source: InfiniSolar-2KW3KW-manual.pdf, p.46

DC Converter 3KW

InverterFault

What it means

Output current is abnormal — Fault code 03 shown on the display with the fault icon on: Output current is abnormal..

Cause: Output current is abnormal.

How to fix it

  1. Restart the converter
  2. If the problem remains, please contact your installer.

Source: DC-converter-3KW-manual.pdf, p.20 · DC-converter-3KW-manual.pdf, p.21

ESS510

Energy storage systemFault

What it means

DC bus voltage soft-start is timeout — Fault code 03 shown on the display with the fault icon on: DC bus voltage soft-start is timeout..

Cause: DC bus voltage soft-start is timeout.

How to fix it

  1. Disconnect AC circuit breaker first.
  2. Then, disconnect DC circuit breaker.
  3. Until LCD screen completely shuts down, turn on DC breaker first.
  4. It will show "No Utility" in LCD screen.
  5. Then, turn on AC breaker.
  6. After 300 seconds, the system will automatically connect to the grid.
  7. If the error message still remains, please contact your installer.

Source: ESS510-manual.pdf, p.68

Galleon II 6K-10K

upsFault

Also applies to:Galleon II 6KGalleon II 10KGalleon III 1KGalleon III 2KGalleon III 3KGiant Elite 1P/1P 6K-10KWinner Pro 1KVA-3KVAWinner Pro 6KVA+6

What it means

Bus under — Fault code 03 shown on the display; the UPS has detected a fault condition: Bus under.

Cause: Bus under.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

Source: GalleonII-6-10K-Tower-RT-manual.pdf, p.29 · Galleon-III-Tower-Rack-1-3K-manual.pdf, p.31 · Giant-Elite-1P-1P_manual.pdf, p.26 · +5 more official manuals

Galleon X9 6K-10K RT

upsFault

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

What it means

Bus Under — Fault code 03 shown on the display; the UPS has detected a fault condition: Bus Under.

Cause: The internal converter failed, so the DC bus voltage is too low.

How to fix it

Contact the dealer to repair.

Source: Galleon-X9-6-10K-RT_manual.pdf, p.28

Giant Elite 3P/3P

upsFault

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

What it means

Overload fault — Fault code 03 shown on the display; the UPS has detected a fault condition: Overload fault.

Cause: Overload fault.

How to fix it

  1. Restart the unit.
  2. If the fault happens again, contact your installer or the repair centre.

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

Frequently asked questions

What does error 03 mean on a Voltronic inverter?
It depends on the model — 48 devices use code 03. On the Axpert MAX II TWIN it means: Battery voltage is too high. The card for each model on this page gives its exact meaning and fix.
Is error 03 a fault or a warning?
03 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 03?
Return to repair center. 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 MAX TWIN codes All Axpert MAX E TWIN codes All Axpert MAX E Duplex codes All Axpert MAX codes All Axpert KING II TWIN codes All Axpert KING codes All Axpert MKS IV TWIN codes All Axpert MKS IV codes All Axpert MKS III TWIN codes All Axpert MKS II codes All Axpert VM II codes All Axpert VM II (PF1) codes All Axpert VM III codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert KS codes All Axpert V (PF1) codes All Axpert WP TWIN codes All Axpert 3KP/5KP 24V codes All InfiniSolar V II codes All InfiniSolar V II 1.5KW codes All InfiniSolar V II 6KW (Split Phase) codes All InfiniSolar V II WP codes All InfiniSolar V codes All ESS-A510 codes All Galleon One 5KL 48V codes

Other codes on the InfiniSolar WP LV 12KW Premium

All InfiniSolar WP LV 12KW Premium codes

Other codes on the InfiniSolar 10KW

All InfiniSolar 10KW codes All InfiniSolar 15KW codes All InfiniSolar Super 4KW codes All InfiniSolar Plus 5KW codes All InfiniSolar TX-PA 30KW codes

Other codes on the InfiniSolar E 5.5KW

All InfiniSolar E 5.5KW codes

Other codes on the InfiniSolar 2KW/3KW

All InfiniSolar 2KW/3KW codes

Other codes on the DC Converter 3KW

All DC Converter 3KW codes

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