Auto-tuning Fault

What does tnF mean?

An auto-tuning detected fault. This means the drive's automatic motor parameter identification process failed to complete successfully. This can be due to incorrect motor wiring, mechanical issues preventing free rotation, or incompatible motor characteristics. Without successful tuning, optimal motor control is not achieved.

Additional Steps

Steps 1–2 are listed in Priority Fix.

1. 3

   Check the motor's nameplate data and ensure matching parameters are entered into the drive.

2. 4

   If the motor has an internal brake, ensure it is released during the tuning process.