09Fault

Voltronic inverter error 09

Bus soft start failed

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+45

What it means

Bus soft start failed

Cause: Internal components failed.

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 · +55 more official manuals

InfiniSolar V II 6KW (Split Phase)

InverterFault

Also applies to:InfiniSolar V II 2P 6KW

What it means

Bus soft start failure — Fault code 09 shown on the display with the fault icon on: Bus soft start failure..

Cause: Internal components failed.

How to fix it

Return to repair center.

Source: InfiniSolar-VII-2P-6KW-manual-20201207.pdf, p.30 · InfiniSolar-VII-2P-6KW-manual-20201207.pdf, p.32

InfiniSolar WP LV 12KW Premium

InverterFault

What it means

power Solar input abnormal — Fault code 09 shown on the display with the fault icon on: power Solar input abnormal.

Cause: power Solar input abnormal.

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 Plus 5KW

What it means

Solar input power abnormal — Fault code 09 shown on the display with the fault icon on: Solar input power abnormal.

Cause: 1. Solar input driver damaged. 2. Solar input power is too much when voltage is more than 850V.

How to fix it

  1. Please check if solar input voltage is higher than 850V
  2. Please contact your installer.

Source: InfiniSolar-10KW-manual-20191126.pdf, p.50 · InfiniSolar-Plus-5KW-manual.pdf, p.51

InfiniSolar 15KW

InverterFault

What it means

Solar input power abnormal — Fault code 09 shown on the display with the fault icon on: Solar input power abnormal.

Cause: 1. Solar input driver damaged. 2. Solar input power is too much when voltage is more than 850V.

How to fix it

  1. Please check if solar input voltage is higher than 900V
  2. Please contact your installer.

Source: InfiniSolar-15K-manual-20200313.pdf, p.51

InfiniSolar E 5.5KW

InverterFault

What it means

PV input voltage exceeds the upper threshold — Fault code 09 shown on the display with the fault icon on: PV input voltage exceeds the upper threshold.

Cause: PV input voltage exceeds the upper threshold.

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 Super 4KW

InverterFault

What it means

Solar input power abnormal — Fault code 09 shown on the display with the fault icon on: Solar input power abnormal.

Cause: 1. When solar voltage is more than 580V.

How to fix it

  1. Please check if solar input voltage is higher than 580V
  2. Please contact your installer.

Source: InfiniSolar-Super-4KW-manual.pdf, p.47

InfiniSolar 2KW/3KW

InverterFault

Also applies to:InfiniSolar 2KWInfiniSolar 3KW

What it means

PV input voltage exceeds the upper threshold — Fault code 09 shown on the display with the fault icon on: PV input voltage exceeds the upper threshold.

Cause: PV input voltage exceeds the upper threshold.

How to fix it

  1. Check if the open circuit voltage of PV modules is higher than 500VDC
  2. If PV open circuit voltage is less than 500VDC and the error message remains, pelase contact your installer.

Source: InfiniSolar-2KW3KW-manual.pdf, p.47

InfiniSolar TX-PA 30KW

InverterFault

What it means

Solar Power abnor — Fault code 09 shown on the display with the fault icon on: Solar Power abnor.

Cause: Solar input voltage is too high.

How to fix it

  1. Please check if solar input voltage is higher than 950V
  2. Please contact your installer.

Source: InfiniSolar-TX-PA_manual.pdf, p.50

DC Converter 3KW

InverterFault

What it means

PV voltage is too high — Fault code 09 shown on the display with the fault icon on: PV voltage is too high..

Cause: PV voltage is too high.

How to fix it

  1. Measure PV input voltage and check if it's over specification
  2. If yes, please reduce the PV panels
  3. If not, restart the converter
  4. 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

PV input voltage exceeds the upper threshold — Fault code 09 shown on the display with the fault icon on: PV input voltage exceeds the upper threshold..

Cause: PV input voltage exceeds the upper threshold.

How to fix it

  1. Check if the open circuit voltage of PV modules is higher than 500VDC.
  2. If PV open circuit voltage is less than 500VDC and the error message remains, please contact your installer.

Source: ESS510-manual.pdf, p.68

Giant Elite 3P/3P

upsFault

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

What it means

INV in L3 is short circuited — Fault code 09 shown on the display; the UPS has detected a fault condition: INV in L3 is short circuited.

Cause: INV in L3 is short circuited.

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 09 mean on a Voltronic inverter?
It depends on the model — 39 devices use code 09. On the Axpert MAX II TWIN it means: Bus soft start failed. The card for each model on this page gives its exact meaning and fix.
Is error 09 a fault or a warning?
09 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 09?
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 WP codes All InfiniSolar V codes All ESS-A510 codes All Galleon One 5KL 48V codes

Other codes on the InfiniSolar V II 6KW (Split Phase)

All InfiniSolar V II 6KW (Split Phase) 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 Plus 5KW codes

Other codes on the InfiniSolar 15KW

All InfiniSolar 15KW codes

Other codes on the InfiniSolar E 5.5KW

All InfiniSolar E 5.5KW codes

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