Ozora Soluções Laboratory — Free diagnostics and a 180-day warranty on repairs.

ABB ACS IGBT Bridge Fault: Rupture in the IGBT Bridge

The IGBT (Insulated Gate Bipolar Transistor) is the electronic heart of any solar inverter or industrial drive. When it fails, the equipment stops or behaves erratically.

Why the IGBT fails

• Overvoltage — spike above the component's rating (lightning and surges)

• Overcurrent — short circuit at the output or excessive load

• Overheating — dried-out thermal paste, defective fan

• Gate driver failure — defective control circuit causes irregular triggering

• Aging — thermal cycles degrade solder joints and packaging

Defective IGBT Symptoms

• Inverter does not turn on (shorted IGBT locks the protection)

• Immediate overcurrent trip when trying to turn on

• Abnormal noise (hum or snap) during startup

• Overcurrent or short circuit code

• Burning smell or visible burn mark

How to test IGBT with a multimeter

With the equipment de-energized and capacitors discharged (wait 5 minutes after turning off):

1. Set the multimeter to diode mode

2. Test between Collector and Emitter — should indicate open circuit in both polarities

3. Continuity in either polarity = shorted IGBT = defective

4. Test between Gate and Emitter — should indicate open circuit

⚠️ Only qualified technicians. Capacitors store dangerous voltage.

IGBT Repair at Ozora

Ozora replaces IGBTs in inverters and drives of all brands: removal of damaged modules, cleaning of the base, high-conductivity thermal paste, replacement with original or certified equivalent components, and bench testing under actual load.

Free diagnostics: We identify if it is the IGBT, gate driver, or another component. Report within 24 hours. Request

Frequently Asked Questions

How much does it cost to repair abb acs igbt bridge fault?

At Ozora, most repairs range between 10% and 25% of the cost of new equipment. Free diagnostics before any decision.

How long does the repair take?

Diagnosis within 24 hours after arrival. Repair takes 3 to 7 business days in most cases.

Does Ozora serve all of Brazil?

Yes. Collection and delivery throughout Brazil. WhatsApp (11) 5043-2147.

Does the repair have a warranty?

Yes. Every Ozora repair comes with a 180-day warranty — the longest on the market.

Request a free diagnostic now

Ozora Soluções has specialized in abb acs igbt bridge fault repairs since 2010. Free diagnosis with a technical report in up to 24 hours, 180-day warranty, and pickup throughout Brazil.

• ✅ Free diagnosis with technical report in up to 24h

• ✅ 180-day warranty on repairs

• ✅ Collection and delivery throughout Brazil

• ✅ 30% Rule: repair costs less than 30% of new equipment

👉 Request a quote with no obligation | 📞 (11) 5043-2147