Motor Thermal Overload Fault

What does OL1 mean?

The OL1 fault is triggered when the motor connected to the drive experiences prolonged overcurrent, causing it to exceed its thermal capacity. This protection is configured by parameters like L1-01 (protection selection) and L1-02 (overload time constant). Continuing to operate a motor in an OL1 condition severely risks damage to motor windings and insulation, leading to premature motor failure and costly downtime.