SCF4

IGBT Short-Circuit (Hard Detection)

Schneider Electric · Altivar Machine ATV320 Variable Speed Drive

What does SCF4 mean?

A hard detection of an IGBT short-circuit. This indicates a severe internal failure of the Insulated Gate Bipolar Transistor (IGBT) within the drive's power stage. This is a critical hardware fault that can cause catastrophic damage to the drive and is usually not field-repairable.

Additional Steps

Steps 1–2 are listed in Priority Fix.

  1. 3

    Consult the drive manufacturer or authorized service personnel for diagnosis.

  2. 4

    The drive unit likely requires replacement or extensive repair by a specialist.

Source: Schneider Electric Altivar Machine ATV320 Variable Speed Drive
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