Voltronic Winner Pro 6-10KVA Error Codes: Causes & Fixes (11 codes)

This is the complete fault table for the Voltronic Winner Pro 6-10KVA ups family — 11 codes shared by 2 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 6KVAWinner Pro 10KVA

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

Fault(11)— operation stops until cleared

Fault codes (11)operation stops until cleared

Bus start failure.

Fault

Fault code 01 shown on the display; the UPS has detected a fault condition: Bus start failure.

CauseBus start failure.

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

Source:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

High Inverter voltage.

Fault

Fault code 12 shown on the display; the UPS has detected a fault condition: High Inverter voltage.

CauseHigh Inverter voltage.

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

Source:WinnerPro-6-10KVA_manual.pdf· page 23

Low Inverter voltage.

Fault

Fault code 13 shown on the display; the UPS has detected a fault condition: Low Inverter voltage.

CauseLow Inverter voltage.

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

Source:WinnerPro-6-10KVA_manual.pdf· page 23

Inverter output short circuited.

Fault

Fault code 14 shown on the display; the UPS has detected a fault condition: Inverter output short circuited.

CauseInverter output short circuited.

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

Source:WinnerPro-6-10KVA_manual.pdf· page 23

Battery SCR short circuited.

Fault

Fault code 21 shown on the display; the UPS has detected a fault condition: Battery SCR short circuited.

CauseBattery SCR short circuited.

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

Source:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

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:WinnerPro-6-10KVA_manual.pdf· page 23

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Common questions about Winner Pro 6-10KVA error codes

What is the difference between a fault and a warning on the Winner Pro 6-10KVA?: A fault puts the unit into protection and stops normal operation — this page lists 11 of them for the Winner Pro 6-10KVA. The Winner Pro 6-10KVA 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 6-10KVA shares its firmware and fault table with 1 other model number: Winner Pro 6KVA, Winner Pro 10KVA. 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 WinnerPro-6-10KVA_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.