OSF
Overvoltage (Steady State/Acceleration)
Schneider Electric · ALTIVAR 28 Variable Speed Drive
What does OSF mean?
This fault occurs when the DC bus voltage within the drive controller is too high, either during steady-state operation or acceleration, usually caused by an excessively high incoming line voltage. High DC bus voltage can stress and damage the drive's internal capacitors and power semiconductors.
Complete Troubleshooting Guide
- 1
Measure the incoming line voltage at the drive's input terminals to confirm it is within the specified operating range.
- 2
Identify and rectify any issues with the upstream power supply or grid that are causing the overvoltage condition.