AMA calibration failed

What does 50 mean?

The Automatic Motor Adaptation (AMA) routine failed to complete successfully. AMA is crucial for optimizing drive performance by precisely identifying motor parameters. A failed calibration means the drive is not operating with optimal motor data, potentially leading to inefficient operation, motor stress, or poor control.

• Motor is disconnected or has poor connection at drive output terminals (U, V, W).
• Incorrect motor data parameters (P1-20 to P1-25) entered, not matching motor nameplate.
• Mechanical binding or obstruction preventing free rotation of the motor shaft.
• Drive output phase loss due to internal fault or damaged motor cable.
• Excessive motor cable length or incorrect cable type causing high impedance or capacitance.

Click steps to track your progress.

1. 1

   1. Verify motor connection integrity at terminals U, V, W using an ohmmeter for phase-to-phase continuity and resistance.

2. 2

   2. Confirm all motor data parameters (P1-20 to P1-25) precisely match the motor nameplate specifications.

3. 3

   3. Disconnect the motor from its mechanical load and attempt AMA to rule out external mechanical binding.

4. 4

   4. Measure insulation resistance of motor cables and windings using a megohmmeter (e.g., 500VDC test voltage).

5. 5

   5. Check for voltage imbalance or phase loss at the drive output terminals (U, V, W) during an AMA attempt using a voltmeter.