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51

External fault

Vacon · 20 Compact

¿Qué significa 51 ?

A digital input that has been configured as an external fault input has become active. This means an external device connected to this input has signaled a fault condition to the frequency converter.

Causas comunes

  • DC bus voltage exceeds the drive's maximum safe limit (e.g., P0205).
  • Regenerative braking energy too high for the DC bus to dissipate.
  • Line voltage surge during power-up.
  • Faulty braking resistor or chopper circuit.
  • Capacitor bank failure in the DC link.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Identify the external device connected to the programmed digital input (e.g., DI6) and resolve the fault condition originating from that device.

Ver todos los códigos en este manual (26)
Datos técnicos verificados. Última actualización: March 2026

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