Motor Overtemperature Warning

What does E251 mean?

As soon as the motor temperature warning threshold (145°C) is exceeded, warning E251 is generated. The ECODRIVE DKC01.1/DKC11.1 drive continues to comply with the command value. A shutdown (F219) occurs only if the temperature error threshold (155°C) is exceeded.

• The motor became overloaded; the effective torque required of the motor was above the allowable standstill continuous torque for too long.
• Poor ventilation around the motor, leading to insufficient cooling.
• Increased friction or mechanical binding in the driven load.
• Incorrect motor thermal model parameters in the ECODRIVE DKC01.1/DKC11.1 drive.

Click steps to track your progress.

1. 1

   Check the installation and loading of the motor. Verify if operating conditions have changed (e.g., increased friction, mechanical binding, poor ventilation).

2. 2

   Reduce the load on the motor or adjust the operating cycle to allow sufficient cooling time.

3. 3

   Verify the motor current against the motor nameplate FLA and the application requirements.

4. 4

   Inspect the motor temperature sensor wiring for continuity and correct connection to the ECODRIVE DKC01.1/DKC11.1 drive.