Overtorque Fault

What does Ot mean?

This fault occurs when the estimated motor torque has continuously exceeded the configured [Overtorque level] (F616) for a duration longer than the set [Ovtorque det time] (F618). This indicates a significant mechanical overload on the motor or the connected machinery. Ignoring this fault can lead to severe damage to the motor windings, mechanical components, or drive internal circuitry due to sustained excessive current draw and heat generation. The drive stops operation upon detection to prevent further damage.

Complete Troubleshooting Guide

1. 1

   Inspect the driven equipment and mechanical load for any obstructions, binding, or excessive resistance that could be causing the motor to draw high torque.

2. 2

   Verify the motor's mechanical connection and alignment to the load. Ensure proper lubrication and check for bearing issues.

3. 3

   Review parameters F616 (Overtorque level) and F618 (OvTorque det time). Adjust these settings if the application legitimately experiences brief torque spikes within safe operating limits, but do not bypass protection entirely.

4. 4

   Measure the actual motor current and compare it against the motor's rated current and the drive's output to confirm the overtorque condition and ensure the motor is appropriately sized for the application's demands.