Repair UPS
industrialgo
APC Smart-UPS · Eaton 5PX/9SX · Emerson Liebert · Legrand · Riello · FSP
Comprehensive repair of UPS power supplies — VRLA/Li-Ion battery replacement, IGBT inverter service, rectifier, electrolytic capacitors, DSP controllers. Quote 24h, 12-month warranty.
Diagnostics included in repair
No-obligation quote
12-month warranty
Courier pickup from all of Europe
Online test after repair
UPS — what and how do we repair?
VRLA battery replacement
Replacement of VRLA (SLA) gel batteries from brands B.B. Battery, CSB, FIAMM, Enersys or equivalents. Calibration of battery management circuit (BMS) after replacement.
IGBT/MOSFET inverter service
Repair of inverter section (DC/AC): replacement of IGBT or MOSFET transistors, gate driver controllers, filter capacitors, inverter soft-start circuits.
Rectifier and charger service
Repair of input rectifier (AC/DC): replacement of diodes, power transistors, Bulk capacitors, PFC controllers, battery charger and battery voltage measurement circuits.
DSP / MCU controllers
Diagnostics and repair of UPS DSP/microcontroller boards: replacement of faulty ICs, restoration of RS-232/USB/SNMP communication, LCD display service.
Protection and bypass
Repair of static bypass switch (SCR/TRIAC), automatic transfer circuits (STS), surge protection elements.
Online test after repair
Every repaired UPS is tested in online mode: mains failure simulation, switchover to battery, hold time at 100% load, return to AC.
Why EFIXLAB?
UPS service from all brands
- All brands and classes — APC Smart-UPS (SMT/SRT/SURT), Eaton (5P/5PX/9SX/93PM), Emerson Liebert (GXT4/PSI5/EXM/NX), Legrand, Riello, FSP Fortron, CyberPower and others.
- Three-phase UPS — service of large 3-phase UPS systems (10–200 kVA): Emerson NX, Eaton 93PM/93E, APC Symmetra PX, Legrand UPS 3ph.
- Li-Ion and VRLA — replacement of VRLA gel batteries and new lithium-ion (Li-Ion) batteries used in newer APC and Eaton models.
- BMS diagnostics — service of battery management circuits after battery replacement, capacity calibration, cycle counter reset.
- 12-month warranty — on all service work.
How does repair work for UPS?
Request
online or by phone
Shipping
by courier
UPS
diagnostics
Quote
no obligation
Repair
& online test
Return
with warranty
Report fault UPS — no-obligation quote
Provide the brand, UPS model, power (VA/W), battery type and fault description (alarm, error code, no switchover). Our technician will contact you shortly.
Dziękujemy! Your request has been received — our UPS specialist will contact you shortly.Frequently asked questions — UPS
Battery replacement is always a cost-effective repair (cost of batteries + labour vs. price of a new UPS). Electronics repair (inverter, rectifier) is cost-effective for UPS above 2–3 kVA. Cheap UPS 650–1000VA below 300 PLN net are usually not cost-effective for electronics repair.
The alarm indicates the UPS has measured battery capacity and found it falling below the threshold (typically 80% of rated capacity). Replacing VRLA batteries every 3–5 years is the correct maintenance cycle. After replacement, calibrate capacity in the UPS software.
Yes, we repair large 3-phase UPS systems: Emerson Liebert NX/XD, Eaton 93PM/93E, APC Symmetra PX. Shipping required or by arrangement — on-site service in Poland.
UPS Repair — All Manufacturers and Power Ratings
Uninterruptible Power Supply (UPS) systems from APC, Eaton, Emerson (Vertiv), Socomec, Riello, and others protect critical infrastructure — data centers, telecommunications, industrial control systems, and medical equipment — from power disturbances. UPS systems range from small desktop units to multi-megawatt installations, employing online double-conversion, line-interactive, or offline topologies. When a UPS fails, the equipment it protects becomes vulnerable to power outages, surges, and quality issues that can cause data loss, equipment damage, or production shutdown.
Common UPS failures include battery charger circuit degradation, inverter IGBT/MOSFET power stage failures, DC bus capacitor aging, bypass transfer switch malfunctions, fan cooling system failures, control board processor faults, and communication module problems (SNMP, Modbus, relay contacts). Online double-conversion UPS systems operate their power electronics continuously, causing more component wear than line-interactive or offline designs. Capacitor aging is the most common UPS failure mode, as electrolytic capacitors have finite service lives that depend heavily on temperature.
At EFIXLAB, we repair UPS electronics from all major manufacturers. Our service covers charger circuit repair, inverter power stage rebuild, DC bus capacitor bank replacement, static bypass switch repair, control board diagnostics, and communication module restoration. We test all repaired UPS systems under battery and mains operation, verify transfer switching, and confirm output quality meets specifications.
UPS repair typically saves 40–65% versus new UPS purchase, with the additional benefit of avoiding the installation and commissioning work associated with UPS replacement. For legacy UPS systems with remaining battery life, electronics repair extends system service life. All UPS electronics repairs include comprehensive testing and our 12-month warranty.