What is the difference between a fault and a warning on the InfiniSolar 15KW?

A fault cuts the unit's output and the red LED stays solid — this page lists 27 of them for the InfiniSolar 15KW. A warning only flashes the red LED and the unit keeps running; there are 15 warning codes here. Resolve the cause of a fault before restarting; warnings can usually be cleared while the unit runs.

Does this page apply to other Voltronic models?

No — this table was transcribed specifically from the InfiniSolar 15KW manual. Other Voltronic devices have their own pages; start from the error-code hub to find the one matching the model number on your unit's label.

Where do these codes come from?

Every entry was transcribed from InfiniSolar-15K-manual-20200313.pdf — Voltronic's official documentation. Each row cites its source manual (and page where printed), so you can verify the wording before acting on it.

Voltronic InfiniSolar 15KW Error Codes: Causes & Fixes (42 codes)

This is the complete fault table for the Voltronic InfiniSolar 15KW Inverter — all 42 codes from the official manual on one page. On Voltronic units, a fault code means the unit has cut its output and the red LED stays solid; a warning flashes the red LED while the unit keeps running.

Last checked against the official manuals on July 27, 2026.

Fault(27)— output stops · red LED solid
Warning(15)— unit keeps running · red LED flashing

Fault codes (27)output stops · red LED solid

Bus voltage over.

Fault

Fault code 01 shown on the display with the fault icon on: Bus voltage over.

CauseSurge.

Recommended fix1. Restart the inverter. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

BUS voltage under.

Fault

Fault code 02 shown on the display with the fault icon on: BUS voltage under.

CausePV or battery disconnect suddenly.

Recommended fix1. Restart the inverter 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

BUS soft start time out.

Fault

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

CauseInternal components failed.

Recommended fixPlease contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

INV soft start time out.

Fault

Fault code 04 shown on the display with the fault icon on: INV soft start time out.

CauseInternal components failed.

Recommended fixPlease contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

INV over current.

Fault

Fault code 05 shown on the display with the fault icon on: INV over current.

CauseSurge.

Recommended fix1. Restart the inverter. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

Over temperature.

Fault

Fault code 06 shown on the display with the fault icon on: Over temperature.

CauseInternal temperature is too high.

Recommended fix1. Check the ambient temperature and fans. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

Relay fault.

Fault

Fault code 07 shown on the display with the fault icon on: Relay fault.

CauseInternal components failed.

Recommended fixPlease contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

CT sensor fault.

Fault

Fault code 08 shown on the display with the fault icon on: CT sensor fault.

CauseInternal components failed.

Recommended fixPlease contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

Solar input power abnormal.

Fault

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

Cause1. Solar input driver damaged. 2. Solar input power is too much when voltage is more than 850V.

Recommended fix1. Please check if solar input voltage is higher than 900V. 2. Please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

Solar over current.

Fault

Fault code 11 shown on the display with the fault icon on: Solar over current.

CauseSurge.

Recommended fix1. Restart the inverter. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

GFCI fault.

Fault

Fault code 12 shown on the display with the fault icon on: GFCI fault.

CauseLeakage current excceds the limit.

Recommended fix1. Check the wire and panels which may cause the leakage. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

PV ISO fault.

Fault

Fault code 13 shown on the display with the fault icon on: PV ISO fault.

CauseThe resistance between PV and ground is too low.

Recommended fix1. Check the wire and panels which may cause the leakage. 2. If the error message still remains, please contact your installer.

Source:InfiniSolar-15K-manual-20200313.pdf· page 51

INV DC current over.

Fault

Fault code 14 shown on the display with the fault icon on: INV DC current over.

CauseUtility fluctuates.

Recommended fix1. Restart the inverter. 2. If the error message still remains, please contact your installer.