Motor Overheat Alarm (Level 3)

What does OH3 mean?

This alarm signals that the motor's temperature has reached an elevated state, specifically when the motor temperature analog input (H3-09=E) exceeds the 1.17V threshold (OH3 level). It serves as an early warning for potential overheating, but does not stop the drive unless configured to do so. Ignoring this alarm could lead to a more severe OH4 fault or motor damage if temperatures continue to rise.