Siemens SINAMICS G120 Error Code F30037

Siemens PLC & VFD Critical Overvoltage

Model: SINAMICS G120 | Code: F30037

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

Symptoms

Power module DC link overvoltage.

Possible Causes

  • Deceleration too fast
  • No brake chopper
  • Mains voltage too high

Troubleshooting Steps

  1. Step 1: Increase deceleration time
    No overvoltage trip
  2. Step 2: Connect brake resistor
    DC link voltage controlled
  3. Step 3: Check mains voltage
    Voltage within rated range

How to Reset

Reset via operator panel after resolving overvoltage.

Related Siemens Fault Codes

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Source: Siemens SINAMICS G120 List Manual

Category: PLC & VFD