Variable Speed Drive (VSD) Breakdown Repairs & Electrical Fault Finding

DC bus overvoltage, ground fault trips, and burnt input rectifiers bring motor speed control to an immediate halt. Lectro Power Systems delivers prompt on-site drive diagnostics, parameter cloning, and inverter replacement services across Perth and regional Western Australia.
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0428 228 552
Symptoms We Resolve

Common VSD Faults We Diagnose & Fix

  • Overcurrent & Ground Fault Trips

    Testing motor winding insulation, checking shielded output cabling, and diagnosing internal drive IGBT power modules.

  • DC Bus Overvoltage During Deceleration

    Sizing and installing dynamic braking resistors, checking chopper modules, and adjusting deceleration ramps.

  • Cooling Fan & Thermal Overheat Alarms

    Replacing seized internal heatsink fans, clearing blocked air ducts, and cleaning heatsinks.

  • Analogue Speed Reference Signal Drops

    Isolating electrical noise on 0–10V/4–20mA speed potentiometer lines and fitting signal isolators.

  • Fieldbus Communication Timeouts

    Resolving dropped Ethernet/IP, Modbus TCP, and Profinet communication links between drive and PLC.

  • Input Rectifier & Pre-Charge Failures

    Testing internal diode bridges and DC bus capacitors damaged by power surges and brownouts.
Emergency Breakdown? Call 0428 228 552
The Lectro Advantage

Why Choose Lectro for VSD Repairs

  • Drive parameter backup & cloning

    Rapid commissioning of replacement VSD units using backed-up parameter files for minimal downtime.

  • IGBT & capacitor bank testing

    Advanced testing of internal semiconductor power modules to verify if a drive can be saved or replaced.

  • Harmonic & line reactor installations

    Installing line reactors and dV/dt filters to protect drives from power spikes and eliminate nuisance trips.
Capability Statement
FAQs

Frequently Asked Questions

Why does our VSD trip on "Overvoltage" whenever the motor tries to slow down?
How do line reactors protect Variable Speed Drives from utility power surges?
Can you clone the parameters from our damaged drive into a brand-new replacement?
Which VSD brands do you service and replace on-site?