Motor overload temperature

What does ALARM 10 mean?

The motor's electronic thermal protection (ETR) indicates it is too hot. This fault occurs when the motor runs with more than 100% overload for an extended period, risking damage to motor windings and insulation. The frequency converter issues a warning at >90% and trips at 100% (depending on parameter 1-90 Motor Thermal Protection settings).

• Motor operating under sustained mechanical overload, drawing current above its rated value.
• Insufficient motor cooling due to blocked motor fan, dirty cooling fins, or high ambient temperature.
• Incorrect motor data parameters (P1-03 to P1-07) entered into the frequency converter, leading to an inaccurate thermal model.
• Motor operating at very low speeds for extended periods without independent cooling, reducing its self-cooling effectiveness.
• Voltage imbalance or harmonic distortion from the frequency converter output to the motor.

Click steps to track your progress.

1. 1

   Monitor the motor current (parameter 16-10 Output Current) and motor thermal load (parameter 16-30 Motor Thermal) on the frequency converter display.

2. 2

   Verify motor nameplate data (kW, V, A, Hz, RPM) against the frequency converter's motor setup parameters (P1-03 to P1-07).

3. 3

   Inspect the motor's cooling fan and cooling fins for obstructions or excessive dirt accumulation.

4. 4

   Reduce the mechanical load on the motor or consider increasing the motor's power rating for the application.

5. 5

   Check for correct wiring between the frequency converter and the motor (U, V, W) to ensure no phase loss or imbalance.