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909

RIPPLE FAULT

Otis · DSD 412 DC Elevator Drive

¿Qué significa 909 ?

Repeated instances of high peak-to-average motor armature current are detected. This condition can be caused by defective hardware, inadequate regulator tuning, or other oscillatory operating conditions.

Causas comunes

  • Defective hardware components, which can be diagnosed using the PCU Diagnostics CDU function #998.
  • Poor tuning or configuration of the drive's current regulator.
  • Other conditions leading to oscillatory operation within the motor or drive system.

Pasos de reparación & Lista de verificación

Haga clic en los pasos para seguir su progreso.

  1. 1

    Execute the PCU Diagnostics CDU function #998 to identify any defective hardware.

  2. 2

    Review and adjust the drive's regulator tuning parameters to stabilize current ripple.

Ver todos los códigos en este manual (48)
Datos técnicos verificados. Última actualización: March 2026

Fallas relacionadas

Fuente: Otis DSD 412 DC Elevator Drive