Product pictures Product Overview: Emerson UNI2403 Parameter Specification Brand Emerson / Control Techniques Part No. SKD3400750 Series Unidrive SK Type AC Variable Frequency Drive (VFD) Application & Fault Scenarios System: Emerson SKD3400750 Unidrive SK AC drive used in conveyors, pumps, fans, compressors, extruders, packaging machines, and general manufacturing automation for motor speed control. Typical Faults: IGBT module failure → OC/OH trip, drive won't restart DC bus