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.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 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.

2. 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.