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OPEN SCR FAULT

Otis · DSD 412 DC Elevator Drive

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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.

Häufige Ursachen

  • One or more SCRs are failing to conduct current.
  • Faulty or disconnected SCR gating leads.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

    Initiate a DSD Power Down for the drive.

  2. 2

    Run the PCU #998 Diagnostics CDU function to identify the non-conducting SCR.

  3. 3

    If available, use the optional handheld PCDU to identify the exact open SCR pair.

  4. 4

    Check the SCR gating leads for proper connection and integrity.

  5. 5

    Replace the identified open SCR.

Alle Codes in diesem Handbuch durchsuchen (48)
Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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Quelle: Otis DSD 412 DC Elevator Drive