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F912

OPEN SCR

Otis · DSD 412 Elevator System

Hva betyr F912 ?

This fault is detected by the PCU Diagnostics function (Function #998) and indicates that one or more SCRs (Silicon Controlled Rectifiers) or doubler packs within the DSD 412 drive are open, meaning they are not conducting current as expected.

Vanlige årsaker

  • Failure of an SCR or doubler pack, resulting in an open circuit.

Reparasjonssteg & Sjekkliste

Klikk på steg for å spore fremgangen.

  1. 1

    Remove power from the drive.

  2. 2

    Consult Section 5, MAINTENANCE, to identify and replace the open SCR(s).

  3. 3

    Repeat the PCU Diagnostics function to confirm the issue is resolved.

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Verifisert teknisk data. Sist oppdatert: March 2026

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