OSF

Mains Overvoltage

Schneider Electric · Altivar 312 Variable Frequency Drive

What does OSF mean?

This fault indicates that the incoming line voltage supply to the drive has exceeded the drive's maximum permissible limits. This can be due to an inherently high supply voltage or transient disturbances on the line. Sustained overvoltage can lead to damage to the drive's input rectifier and DC bus components.

Complete Troubleshooting Guide

  1. 1

    Measure the incoming line voltage to the drive and confirm it is within the drive's specified operating range.

  2. 2

    Investigate for external line disturbances or voltage spikes that could be causing transient overvoltage conditions.

Source: Schneider Electric Manual