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3

No motor connected

Danfoss · VLT HVAC Drive FC 102

¿Qué significa 3 ?

No motor is detected connected to the output of the frequency converter. This prevents the drive from starting or operating correctly, as it expects a motor load. Attempting to run without a motor can cause issues with the drive's output stage.

Causas comunes

  • Motor output terminals (U, V, W) disconnected or incorrectly wired to the drive.
  • High resistance or open circuit in one or more motor phases (U, V, W) preventing detection.
  • Motor's internal windings (e.g., phase A-B, B-C, C-A) have an open circuit.
  • Drive's output stage (IGBTs or current sensors) internal fault preventing motor detection.
  • Incorrect motor parameter settings (e.g., P1-03 Motor Rated Current, P1-04 Motor Rated Speed) that do not match the physical motor.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Verify the motor wiring physically connected to the drive output terminals (U, V, W) for proper connection and tightness.

  2. 2

    Measure the resistance between each pair of motor output terminals (U-V, V-W, W-U) with the motor disconnected from the drive. Readings should be balanced and within manufacturer specifications.

  3. 3

    Measure the insulation resistance of each motor phase to ground using a megohmmeter. Readings should be in the MΩ range.

  4. 4

    Ensure drive parameters P1-03 (Motor Rated Current) and P1-04 (Motor Rated Speed) are correctly configured for the connected motor.

  5. 5

    Attempt to perform an Automatic Motor Adaptation (AMA) or motor identification routine, if available in the drive's menu.

Ver todos los códigos en este manual (75)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Danfoss VLT HVAC Drive FC 102