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4

Over-current of Discharge Current (ECM)

Fanuc · Alpha i Series AC Servo Motor and Spindle

¿Qué significa 4 ?

An over-current condition has occurred in the discharge current path from the Capacitor Modules of the ECM. This indicates a problem with the discharge circuit, potentially during emergency stop or an internal fault.

Causas comunes

  • Excessive discharge current from the motor exceeds ECM's rated limit.
  • Short circuit within the motor windings or drive components.
  • Sudden heavy load applied to the motor during operation.
  • Incorrect motor model or parameters configured in the drive (e.g., P1-01 to P1-09).
  • Motor encoder signal failure causing incorrect speed feedback.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Inspect the wiring and connections from the Capacitor Modules to the discharge circuit.

  2. 2

    Verify the operation of the Resistor Module, which is used for discharging.

  3. 3

    Check the Capacitor Modules for any signs of damage or internal shorts.

Ver todos los códigos en este manual (29)
Datos técnicos verificados. Última actualización: March 2026

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Fuente: Fanuc Alpha i Series AC Servo Motor and Spindle