OC5

What does 015 mean?

The drive is experiencing an I x t overload, characterized by frequent and excessively long acceleration phases with overcurrent, or continuous overload where Imotor > 1.05 x Irx. This indicates that the drive is undersized for the application.

• Load inertia is too high for the motor/drive combination, causing extended acceleration times with excessive current.
• Mechanical binding, increased friction, or a seized component in the driven equipment, requiring higher starting torque.
• Drive acceleration time (e.g., Parameter C0026) is set too short, leading to rapid current increase and an Ixt trip.
• Motor rated current (e.g., Parameter C0020) is set incorrectly or lower than the actual motor nameplate current.
• Continuous operation where Imotor > 1.05 x Irx, indicating the drive is undersized for the application's continuous demand.

Click steps to track your progress.

1. 1

   1. Monitor the actual motor current (via drive display or clamp meter) during acceleration and steady-state operation, comparing it to the drive's rated output current (Irx).

2. 2

   2. Increase the drive's acceleration time (e.g., Parameter C0026) in small increments (e.g., 0.5-1.0 seconds) and observe the fault frequency.

3. 3

   3. Verify that the motor rated current (Parameter C0020) and motor nominal frequency (Parameter C0022) in the drive parameters match the motor nameplate data.

4. 4

   4. Mechanically disengage the motor from the load (if safe) and run the motor unloaded to check for drive current anomalies and reduce mechanical influence.

5. 5

   5. Inspect the mechanical system (bearings, gearboxes, belts) for signs of binding, wear, or excessive friction that would increase load.