Motor Stall

What does 15 mean?

This fault occurs when the motor's rotor has stopped rotating despite receiving power, typically due to excessive load, mechanical binding, or an issue within the motor itself. A stalled motor can draw dangerously high currents, leading to winding overheating and potential motor or drive damage if not addressed quickly.

• Excessive mechanical load applied to the motor shaft, exceeding its rated torque capacity (e.g., conveyor jammed, pump seizing).
• Mechanical binding or seizing of driven equipment components (e.g., bearings, gears, coupling) causing rotor immobility.
• Incorrect drive parameters for motor control, such as inadequate torque boost (P2-01) or too aggressive acceleration ramps (P2-02, P2-03).
• Severe reduction in motor supply voltage or current from the AC drive, leading to insufficient torque generation.
• Internal mechanical fault within the motor itself, such as seized bearings or rotor-stator rub.

Click steps to track your progress.

1. 1

   1. Disconnect the motor from its mechanical load and attempt to rotate the motor shaft by hand to check for free movement.

2. 2

   2. With the motor mechanically disconnected, attempt to start the motor at low speed (e.g., 5Hz) from the drive to verify motor rotation.

3. 3

   3. Measure the output current (e.g., P1-05) and output voltage (e.g., P1-06) from the drive during the stall event to identify electrical issues.

4. 4

   4. Review motor control parameters such as P2-01 (Motor Torque Boost) and P2-02 (Acceleration Time) to ensure they are correctly set for the application.

5. 5

   5. Physically inspect the driven equipment for any jams, seized bearings, or foreign objects causing mechanical resistance.