Schneider VX5AAFEC34N4 VFD Power Board Unit

Module Feature

VX5AAFEC34N4 is Schneider ATV series variable frequency drive power board, size 13 frame, 400V voltage grade.

It integrates three-phase IGBT power module, current sampling circuit, gate drive and buffer circuit. It receives PWM pulse command from control board and outputs variable frequency three-phase power to motor. It has built-in overcurrent, over-temperature and short-circuit hardware protection. This power board is a direct replacement spare for repairing failed ATV drives, widely used in water treatment, HVAC, mining and general machinery control cabinet.

Working principle

DC bus voltage is supplied to the IGBT power stage on this board.

PWM drive signals sent by the control board trigger the IGBT group to turn on and off alternately. The power board converts fixed DC voltage into adjustable frequency and adjustable AC voltage for motor speed regulation. Real-time current and temperature signals are fed back to the control board for protection interlock.

Onboard components

Three-phase IGBT power module, gate drive optocoupler, current sampling CT, temperature thermistor, absorption protection capacitor, power thick copper PCB, surge suppression components, backplane connector and terminal copper bar interface.

LED indicators

Front LEDs indicate power ready, drive active, over-temperature fault and hardware protection trip.

Hardware self‑diagnosis

Built-in supervision detects overcurrent, short circuit, IGBT desaturation, over-temperature and DC bus abnormal. Fault codes can be checked via ATV SoMove software or HMI panel.

Programming software

SoMove, used for drive parameter setting, fault reading and drive commissioning.

Electrical & Process Parameters

Model:VX5AAFEC34N4 Brand:Schneider Electric Device type:ATV inverter power PCB assembly Function:DC to 3-phase AC power conversion for variable frequency motor drive

Mechanical & Structure

Mounting:Install inside ATV drive chassis, fixed by screws Protection class:IP20 (inside drive enclosure) Housing:Heavy copper industrial power PCB assembly

Environmental

Operating temperature:-10℃ ~ +70℃ Storage temperature:-40℃ ~ +85℃ Ambient humidity:5~95% non‑condensing

Certification:CE, UL

Status:Original Schneider VFD spare

Installation

Completely cut off DC bus power and wait for capacitor discharge before replacement.

Match pin definition and torque the power terminals, download drive parameters and perform no-load test after assembly.

Interface

DC bus copper bar terminal, three-phase motor output terminal, control board signal connector, temperature feedback terminal.

Diagnostic

Overcurrent fault: IGBT breakdown, motor short circuit or current sampling circuit damage. Over-temperature alarm: Cooling fan failure, heat sink blocked or thermistor open. No motor output: Gate drive circuit damage, control pulse missing or board power failure.

Product Brief

Schneider VX5AAFEC34N4 power board, ATV size13 400V inverter power spare card for pump, fan and conveyor variable frequency control cabinet replacement.