Voltronic Winner Pro+ 1K-3K Error Codes: Causes & Fixes (13 codes)

This is the complete fault table for the Voltronic Winner Pro+ 1K-3K ups family — 13 codes shared by 3 model numbers, transcribed from the official manual. 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.

Also coversWinner Pro+ 1KWinner Pro+ 2KWinner Pro+ 3K

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

Fault(13)— operation stops until cleared

Fault codes (13)operation stops until cleared

Bus start fail.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Bus over.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Bus under.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Bus unbalance.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Inverter soft start failure.

Fault

Fault code 11 shown on the display; the UPS has detected a fault condition: Inverter soft start failure.

CauseInverter soft start failure.

Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.

Source:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Inverter voltage high.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Inverter voltage Low.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Inverter output short.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Battery voltage too high.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Battery voltage too low.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Over temperature.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Overload.

Fault

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:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

Charger failure.

Fault

Fault code 45 shown on the display; the UPS has detected a fault condition: Charger failure.

CauseCharger failure.

Recommended fixRestart the unit. If the fault happens again, contact your installer or the repair centre.

Source:winnerproplus-1-3k-tower-rack-manual.pdf· page 24

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Common questions about Winner Pro+ 1K-3K error codes

What is the difference between a fault and a warning on the Winner Pro+ 1K-3K?: A fault puts the unit into protection and stops normal operation — this page lists 13 of them for the Winner Pro+ 1K-3K. The Winner Pro+ 1K-3K 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.
Which model numbers does this page cover?: The Winner Pro+ 1K-3K shares its firmware and fault table with 2 other model numbers: Winner Pro+ 1K, Winner Pro+ 2K, Winner Pro+ 3K. If your unit is any of these, every code on this page applies to it.
Where do these codes come from?: Every entry was transcribed from winnerproplus-1-3k-tower-rack-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.