What is a VFD and how does it work?

A VFD (Variable Frequency Drive) controls AC motor speed and torque by adjusting frequency and voltage supplied to the motor. It enables smoother starts, controlled acceleration, and energy-efficient operation.

What types of motors can run on VFDs?

Most VFDs are designed for 3-phase induction motors. Some models can also run synchronous and permanent magnet motors with the correct tuning and firmware.

What are signs that a VFD is failing?

Frequent tripping, error codes (OV, UV, GF, OC), inconsistent motor behavior, humming, or excessive heat buildup are signs of impending failure. Visual inspection may also show burnt components or dust blockages.

What brands of VFDs do you service?

We support ABB, Allen-Bradley, Siemens, Yaskawa, Schneider, Delta, WEG, Eaton, Hitachi, Danfoss, and many more — including legacy and discontinued models.

How often should VFDs be maintained?

We recommend full inspection annually for most environments. Dusty or high-heat settings may require semi-annual maintenance with fan and capacitor testing.

Do you offer emergency VFD repair?

Yes. We offer 24/7 emergency dispatch with loaner VFDs, bypass setups, and rapid fault diagnostics to minimize downtime.

Do you program VFDs for HVAC or pump systems?

Yes. We program ramp profiles, PID loops, pressure curves, and fault handling logic for VFDs used in HVAC, pump stations, conveyors, and more.

Can you upgrade or replace outdated VFDs?

Absolutely. We handle legacy VFD decommissioning, panel retrofits, and new VFD installations — including parameter transfers and startup testing.