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OPEN SCR FAULT

Otis · DSD 412 Elevator System

Was bedeutet 912 ?

One of the SCRs does not conduct current as expected. This condition is checked only upon request through the PCU #998 Diagnostics CDU function. The optional handheld PCDU can identify which specific SCR pair is faulty. This fault requires a DSD Power Down.

Häufige Ursachen

  • Non-conducting SCR.
  • Faulty SCR gating leads.

Reparaturschritte & Checkliste

Klicken Sie auf Schritte, um Ihren Fortschritt zu verfolgen.

  1. 1

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

  2. 2

    Check for faulty SCR gating leads.

  3. 3

    Replace the faulty SCR.

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Verifizierte technische Daten. Zuletzt aktualisiert: March 2026

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