51Fault

Voltronic inverter error 51

Over current

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+12

What it means

Over current — Fault code 51 shown on the display with the fault icon on: Over current.

Cause: Over current or surge.

How to fix it

Restart the unit, if the error happens again, please 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 · +25 more official manuals

Axpert KING II TWIN

InverterFault

Also applies to:Axpert KING II TWIN 6KWAxpert KING II TWIN 6.2KWAxpert KING 3KWAxpert KING 5KWGalleon One 5KL 48V

What it means

OP over current

Cause: OP over current or surge.

How to fix it

If the battery is connected well, please return to repair center.

Source: Axpert-KING-II-TWIN-manual-20220915.pdf, p.36 · Axpert-KING-II-TWIN-manual-20220915.pdf, p.43 · Axpert-KING-manual.pdf, p.31 · +3 more official manuals

Axpert MKS III TWIN

InverterFault

Also applies to:Axpert MKS III TWIN 6KWAxpert MKS II 5KVAAxpert VM II 1.2KVAAxpert VM II 2.5KVAAxpert VM II Plus 3KAxpert VM II 3KVA PF1Axpert VM II 5KVA PF1Axpert VM III 1.5KW+13

What it means

Over current or surge — Fault code 51 shown on the display with the fault icon on: Over current or surge.

Cause: Over current or surge.

How to fix it

Restart the unit, if the error happens again, please return to repair center.

Source: Axpert-MKS-III-TWIN-6K-manual.pdf, p.35 · Axpert-MKS-III-TWIN-6K-manual.pdf, p.41 · Axpert-MKS-II-5KVA-manual-20190703.pdf, p.27 · +15 more official manuals

InfiniSolar V II

InverterFault

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

What it means

Over current or surge — Fault code 51 shown on the display with the fault icon on: Over current or surge.

Cause: Over current or surge.

How to fix it

If the battery is connected well, please return to repair center.

Source: InfiniSolarVII_2KW-3KW-5KW_manual.pdf, p.26 · InfiniSolarVII_2KW-3KW-5KW_manual.pdf, p.28 · InfiniSolar-VII-2P-6KW-manual-20201207.pdf, p.30 · +3 more official manuals

InfiniSolar V II 1.5KW

InverterFault

What it means

Over current or surge — Fault code 51 shown on the display with the fault icon on: Over current or surge.

Cause: Over current or surge.

How to fix it

Reduce PV serial amount.

Source: InfiniSolarVII_1.5KW_manual.pdf, p.27 · InfiniSolarVII_1.5KW_manual.pdf, p.29

InfiniSolar 15KW

InverterFault

What it means

Transformer current over — Fault code 51 shown on the display with the fault icon on: Transformer current over.

Cause: Surge.

How to fix it

  1. Restart the inverter
  2. If the error message still remains, please contact your installer.

Source: InfiniSolar-15K-manual-20200313.pdf, p.52

InfiniSolar TX-PA 30KW

InverterFault

What it means

Bat SCR Temp Over — Fault code 51 shown on the display with the fault icon on: Bat SCR Temp Over.

Cause: The temperature is too high inside.

How to fix it

  1. Check the ambient temperature and fans
  2. If the error message still remains, please contact your installer.

Source: InfiniSolar-TX-PA_manual.pdf, p.51

Frequently asked questions

What does error 51 mean on a Voltronic inverter?
It depends on the model — 30 devices use code 51. On the Axpert MAX II TWIN it means: Over current. The card for each model on this page gives its exact meaning and fix.
Is error 51 a fault or a warning?
51 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 51?
Restart the unit, if the error happens again, please 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 MKS IV TWIN codes All Axpert MKS IV codes All Axpert VM IV TWIN (VM4 TWIN) codes All Axpert WP TWIN codes All ESS-A510 codes

Other codes on the Axpert KING II TWIN

All Axpert KING II TWIN codes All Axpert KING codes All Galleon One 5KL 48V codes

Other codes on the Axpert MKS III TWIN

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 KS codes All Axpert V (PF1) codes All Axpert 3KP/5KP 24V codes All InfiniSolar V codes

Other codes on the InfiniSolar V II

All InfiniSolar V II codes All InfiniSolar V II 6KW (Split Phase) codes All InfiniSolar V II WP codes

Other codes on the InfiniSolar V II 1.5KW

All InfiniSolar V II 1.5KW codes

Other codes on the InfiniSolar 15KW

All InfiniSolar 15KW codes

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