Fault code 01 shown on the display; the UPS has detected a fault condition: Bus start fail.
CauseBus start fail.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Voltronic Winner Pro Error Codes: Full List & Fixes
Fault codes (12)operation stops until cleared
Fault code 02 shown on the display; the UPS has detected a fault condition: Bus over.
CauseBus over.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 03 shown on the display; the UPS has detected a fault condition: Bus under.
CauseBus under.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 04 shown on the display; the UPS has detected a fault condition: Bus unbalance.
CauseBus unbalance.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 11 shown on the display; the UPS has detected a fault condition: Inverter soft start fail.
CauseInverter soft start fail.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 12 shown on the display; the UPS has detected a fault condition: Inverter voltage high.
CauseInverter voltage high.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 13 shown on the display; the UPS has detected a fault condition: Inverter voltage Low.
CauseInverter voltage Low.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 14 shown on the display; the UPS has detected a fault condition: Inverter output short.
CauseInverter output short.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 27 shown on the display; the UPS has detected a fault condition: Battery voltage too high.
CauseBattery voltage too high.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 28 shown on the display; the UPS has detected a fault condition: Battery voltage too low.
CauseBattery voltage too low.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 41 shown on the display; the UPS has detected a fault condition: Over temperature.
CauseOver temperature.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Fault code 43 shown on the display; the UPS has detected a fault condition: Overload.
CauseOverload.
Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.
Source:page 15
Still seeing a code on your Winner Pro?
Send us the code on your screen and a Voltronic technician will reply with the exact steps for your unit. If the unit needs replacing, order it online.
This is the complete fault table for the Voltronic Winner Pro ups — all 12 codes from the official manual on one page. On this Voltronic device, a fault code means the unit has entered protection and stopped normal operation; a warning leaves it running. The exact indication (LED pattern or display code) is listed per code below.
Last checked against the official manuals on 27 July 2026.
Keep troubleshooting
- All Voltronic error codesSearch every device and code in the database
- Voltronic & Axpert Error Codes by Model: Fault + Warning Code LookupThe step-by-step troubleshooting guide
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Common questions about Winner Pro error codes
- What is the difference between a fault and a warning on the Winner Pro?
- A fault puts the unit into protection and stops normal operation — this page lists 12 of them for the Winner Pro. The Winner Pro manual defines no separate warning table — every listed code stops operation. 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 Winner Pro 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 winner-pro-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.