Siemens SINAMICS G120 Error Code F0012

Siemens PLC & VFD Major Overtemperature

Model: SINAMICS G120 | Code: F0012

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

Symptoms

Converter thermal protection: internal thermal sensor tripped.

Possible Causes

  • Internal temperature too high
  • Thermal sensor fault
  • Cooling system failure

Troubleshooting Steps

  1. Step 1: Check internal temperature
    Temperature within rated range
  2. Step 2: Verify thermal sensor
    Sensor reading accurate
  3. Step 3: Verify cooling system operation
    Cooling system functional

How to Reset

Reset via operator panel after temperature normalizes.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD