Weldlogic G3900-2C4 Welder

Weldlogic G3900‑2C4 is an industrial plasma welding controller that integrates a PLC, power supply, and I/O modules for automated weld sequencing. Common failure points on this class of units include overheating or failure of the main transformer/rectifier, damaged MOSFET driver boards, and degraded input/output contacts due to repeated welding cycles. Start diagnostics by verifying the 48 V DC bus voltage and inspecting the power supply for ripple or over‑temperature signs; check all I/O terminals for continuity and proper signal levels; then review any stored fault codes on the PLC display for indications of motor driver or weld current regulator faults.[oss-gpt-20b]

Need your Weldlogic repaired or tested?

We specialize in the repair and refurbishment of high-end industrial control electronics and power systems like this unit.

⚙️ Fast Diagnostics – Same-day evaluation available
🔁 Reliable Turnaround – Most jobs ship within 5–10 business days
🧰 Expert Technicians – Decades of board-level experience
✅ 1-Year Warranty – Every repair fully guaranteed

📞 Call Now: 1 (336) 969-0110

Free Estimates • Industrial-grade testing • Nationwide Service

⚡ Call to Purchase AI Services — help us build the next Grace Blackwell GX10 node.

Industrial AI Hardware Recovery — Free Diagnostic • Pay Return Shipping Only

[oss-gpt-20b]

We reclaim and repair GPUs and industrial AI hardware (cards, PSUs, fan modules, VRM boards). Free estimate — you only pay return shipping if you decline.