We service and repair most AC and DC drives used in the elevator industry today.

In addition to the repair, we also replace parts that will extend the life of your drive, including: fans, pilot relays, contactor contacts, and the filter capacitors in all circuits.

The manufacturer specifications of Variable Voltage Variable Frequency (VVVF) drives reccomend bus capacitors should be changed in five to seven year intervals. When these capacitors reach the end of their life cycle they allow a higher AC component on the high voltage buss and cause damage to the IGBT's.

We also look for potentially compromised connections that may not fail now, but could fail in the future. We repair any we find.

Drive Discrepancy Sheet (.pdf 598.2 kB)