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912
OPEN SCR FAULT
Otis · DSD 412 DC Elevator Drive
¿Qué significa 912 ?
One of the SCRs in the system is not conducting current as expected. This condition is checked only upon request through the PCU #998 Diagnostics CDU function. The optional handheld PCDU will also identify which specific SCR pair is faulty. A DSD Power Down is required.
Causas comunes
- One or more SCRs are failing to conduct current.
- Faulty or disconnected SCR gating leads.
Pasos de reparación & Lista de verificación
Haga clic en los pasos para seguir su progreso.
- 1
Initiate a DSD Power Down for the drive.
- 2
Run the PCU #998 Diagnostics CDU function to identify the non-conducting SCR.
- 3
If available, use the optional handheld PCDU to identify the exact open SCR pair.
- 4
Check the SCR gating leads for proper connection and integrity.
- 5
Replace the identified open SCR.
Datos técnicos verificados. Última actualización: March 2026
Fallas relacionadas
Fuente: Otis DSD 412 DC Elevator Drive