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409
UNEXPECTED PCU RESET
Otis · DSD 412 Elevator System
¿Qué significa 409 ?
The PCU processor was unexpectedly reset.
Causas comunes
- Incorrect PCU software and revision level.
- Problem with main circuit card hardware.
- External noise interference.
- Improper equipment and signal grounding connections.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Verify that the correct PCU software and revision level are being used.
- 2
Inspect for external noise interference sources.
- 3
Ensure equipment and signal grounding connections are proper.
- 4
If the problem remains, replace the Drive Control PCB.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Otis DSD 412 Elevator System