Motor stalled

What does 15 mean?

The motor has stalled, meaning it is not rotating despite receiving a run command. This is typically due to an excessive mechanical load or an obstruction preventing rotation. A stalled motor will draw very high current, leading to rapid overheating of the motor windings and potentially the drive's output stage.

• Excessive mechanical load on the motor shaft, exceeding the motor's peak torque capability (e.g., jammed conveyor, seized pump).
• Physical obstruction preventing motor shaft rotation or rotation of the driven equipment.
• Mechanical brake failing to release, keeping the motor shaft locked.
• Drive's stall prevention parameters (e.g., P5-01, P5-02 for stall current/time) set too sensitively.
• Motor bearings seized or severe internal motor damage preventing free rotation.

Click steps to track your progress.

1. 1

   De-energize the drive and mechanically check the motor shaft and connected load for any obstructions, jamming, or seized components.

2. 2

   Check the motor's mechanical brake (if installed) for proper release when the drive receives a run command (e.g., listen for click, observe actuator).

3. 3

   Adjust the drive's stall prevention threshold (e.g., P5-01, "Stall Current Limit") to a higher percentage of rated current, ensuring it is below the motor's locked rotor current.

4. 4

   Increase the drive's stall time delay (e.g., P5-02, "Stall Time") to allow for transient high loads during start-up.

5. 5

   With power off and safely locked out, attempt to manually rotate the motor shaft (if accessible and safe) to confirm it can turn freely without the load.

6. 6

   Measure the current draw on each motor phase (U, V, W) using a clamp meter during the stall condition, if safe, to confirm excessive current.