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-Plus-5KW-manual.pdf· page 51
Voltronic InfiniSolar Plus 5KW Error Codes: Causes & Fixes (40 codes)
This is the complete fault table for the Voltronic InfiniSolar Plus 5KW Inverter — all 40 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.
How to read the severity labels
- Fault(23)— output stops · red LED solid
- Warning(17)— unit keeps running · red LED flashing
Fault codes (23)output stops · red LED solid
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-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
Fault code 07 shown on the display with the fault icon on: Relay fault.
CauseInternal components failed.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
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 850V. 2. Please contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 51
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-Plus-5KW-manual.pdf· page 52
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-Plus-5KW-manual.pdf· page 52
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.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 16 shown on the display with the fault icon on: GFCI sensor fault.
CauseGFCI sensor failed.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 22 shown on the display with the fault icon on: Battery high voltage fault.
CauseBattery voltage exceeds the limit.
Recommended fix1. Check the battery voltage. 2. If the error message still remains, please contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 23 shown on the display with the fault icon on: Over load.
CauseThe inverter is loaded with more than 110% load and time is up.
Recommended fixReduced the connected load by switching off some equipment.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 26 shown on the display with the fault icon on: INV short.
CauseOutput short circuited.
Recommended fixCheck if wiring is connected well and remove abnormal load.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 27 shown on the display with the fault icon on: Fan lock.
CauseFan failed.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 32 shown on the display with the fault icon on: INV DC voltage over.
CauseLoad fluctuates.
Recommended fix1. Restart the inverter. 2. If the error message still remains, please contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 33 shown on the display with the fault icon on: INV voltage low.
CauseInternal components failed.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 34 shown on the display with the fault icon on: INV voltage high.
CauseInternal components failed.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 35 shown on the display with the fault icon on: Wire connection fault.
CauseInternal wires loosen.
Recommended fixPlease contact your installer.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Fault code 36 shown on the display with the fault icon on: OP voltage fault.
CauseGrid connects to output terminal.
Recommended fixDon't connect the grid to the ouput terminal.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 52
Warning codes (17)unit keeps running · red LED flashing
Warning code 01 flashing on the display: Line voltage high loss.
CauseGrid voltage is too high.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 02 flashing on the display: Line voltage low loss.
CauseGrid voltage is too low.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 03 flashing on the display: Line frequency high loss.
CauseGrid frequency is too high.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 04 flashing on the display: Line frequency low loss.
CauseGrid frequency is too low.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 05 flashing on the display: Line voltage loss for long time.
CauseGrid voltage is higher than 253V.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 06 flashing on the display: Ground Loss.
CauseGround wire is not detected.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 07 flashing on the display: Island detect.
CauseIsland operation is detected.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 08 flashing on the display: Line waveform loss.
CauseThe waveform of grid is not suitable for inverter.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 10 flashing on the display: EPO detected.
CauseEPO is open.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 11 flashing on the display: Overload.
CauseLoad exceeds rating value.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 12 flashing on the display: Over temperature.
CauseThe temperature is too high inside.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 13 flashing on the display: Batter voltage low.
CauseBattery discharges to low alarm point.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 14 flashing on the display: Battery under-voltage when grid is loss.
CauseBattery discharges to shutdown point.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 15 flashing on the display: Battery open.
CauseBattery is unconnected or too low.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 16 flashing on the display: Battery under-voltage when grid is OK.
CauseBattery stops discharging when the grid is OK.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 17 flashing on the display: Solar over voltage.
CausePV voltage is too high.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Warning code 18 flashing on the display: Inverter cuts off mains output in battery mode.
CauseInverter will cut off mains output and remain power on EMS connector in the battery mode due to low battery.
Recommended fixThe unit keeps operating. Clear the condition shown and the warning resets automatically; if it persists, contact your installer or the repair centre.
Source:InfiniSolar-Plus-5KW-manual.pdf· page 50
Still seeing a code on your InfiniSolar Plus 5KW?
Send us the code on your screen and a Voltronic technician will reply with the exact steps for your unit. Support is free for life — a first diagnosis never needs a callout.
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- Voltronic & Axpert Error Codes by Model: Fault + Warning Code LookupThe step-by-step troubleshooting guide
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Common questions about InfiniSolar Plus 5KW error codes
- What is the difference between a fault and a warning on the InfiniSolar Plus 5KW?
- A fault cuts the unit's output and the red LED stays solid — this page lists 23 of them for the InfiniSolar Plus 5KW. A warning only flashes the red LED and the unit keeps running; there are 17 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 Plus 5KW 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-Plus-5KW-manual.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.
Compiled from official Voltronic user manuals. Always consult your device manual and a qualified technician before performing repairs.