Siemens SINAMICS G120 Error Code F30027

Siemens PLC & VFD Critical Short Circuit

Model: SINAMICS G120 | Code: F30027

Applicable Systems
S7-1200 S7-1500 S7-300 S7-400 LOGO! SINAMICS

Symptoms

Power module IGBT short circuit detected.

Possible Causes

  • IGBT module shorted
  • Gate driver failure
  • Output cable short

Troubleshooting Steps

  1. Step 1: Disconnect motor and power on
    Fault clears without load
  2. Step 2: Inspect IGBT module
    No physical damage
  3. Step 3: Replace power module
    New module operates correctly

How to Reset

Reset via operator panel after power module replacement.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD

Published: 2026-09-29