Our repair technician performed a complete inspection and test of all the parts and components. The variable frequency drive (VFD) was found to have defective components that needed to be replaced. New parts were installed, and the drive was tested under load.
Load testing is an important part of the process and typically takes between one and two hours. We have the capability to fully load test VFD units at the nominal amperage, and run the units for an extensive period of time to monitor current inputs for balance across each phase and verify that motor output signals match the self-monitoring that a VFD is equipped with. We also visually inspect each component individually to determine whether they are within tolerance and check date codes to adhere to the PM recommendations through OEM.
Once all the tests wre passed, the VFD drive was sent to Shipping & Receiving where it was crated, secured, and shipped with overnight delivery. Upon receipt of the request, we guaranteed that the repair would be completed within three days, and the customer received the repaired VFD drive back to their facility on the third day. Once installed, the VFD worked flawlessly and without further disruption for the customer.