Siemens Error Code Reference — All 28 Codes
Complete Siemens error code cheat sheet. All 28 fault codes with plain-English explanations and direct links to fix guides.
Use this page when your Siemens drive, CNC, servo, or controls hardware posts an alarm during production. Start with the exact code, then open the fix guide for overloads, encoder faults, communication alarms, power quality issues, and drive or board failures.
Tip: search the exact brand, model, and alarm together, for example "Siemens F0001" or "Siemens overcurrent fault".
| Error Code | What It Means | Often a cheap fix? | Guide |
|---|---|---|---|
| Siemens Cerberus/MXL Fire Alarm Fault Codes | Troubleshooting Guide | — | Fix → |
| Siemens Circuit Breaker Fault Codes | Complete Guide | — | Fix → |
| Siemens Desigo BMS Fault Codes | Complete Guide | — | Fix → |
| Siemens G120 A01028 | Causes & Fix | — | Fix → |
| Siemens G120 A05006 | IGBT Overtemperature Warning & Fix | — | Fix → |
| Siemens G120 F01250 Fault | Causes & Fix | — | Fix → |
| Siemens G120 F01625 | Causes & Fix | — | Fix → |
| Siemens G120C VFD Fault Code Guide | Complete Diagnostic Reference | — | Fix → |
| Siemens Micromaster F0022 | Causes & Fix | — | Fix → |
| Siemens S7-300/400 CPU Fault Code Guide | Siemens S7-300 and S7-400 PLC fault codes explained. Learn how to diagnose STOP mode, hardware errors, and diagnostic buffer entries using STEP 7 and TIA Portal. | — | Fix → |
| Siemens SENTRON 3WL/3VA Fault Codes | Troubleshooting Guide | — | Fix → |
| Siemens SINAMICS G120 F00001 Fault | Causes & Fix | — | Fix → |
| Siemens SINAMICS G120 F30001 Fault | Power Module Overcurrent Fix | — | Fix → |
| Siemens SINAMICS G120 F30002 Fault | DC Link Overvoltage Fix | — | Fix → |
| Siemens SINAMICS G120 F30003 Fault | DC Link Undervoltage Fix | — | Fix → |
| Siemens SINAMICS G120 F30011 Fault | Phase Loss Fix | — | Fix → |
| Siemens SINAMICS G120 F30021 Fault | Ground Fault Fix | — | Fix → |
| Siemens SINAMICS G120X Fault Codes: Complete Guide | Siemens SINAMICS G120X VFD fault codes and diagnostics. F-series and A-series codes, causes, and technician-level troubleshooting. | — | Fix → |
| Siemens SINAMICS S120 Fault F07900 | Motor Overtemperature Fix | — | Fix → |
| Siemens SINAMICS V20 F4 Fault | Causes & Fix | — | Fix → |
| Siemens SINAMICS V20 F4 Fault | Inverter Overtemperature Fix | — | Fix → |
| Siemens Sinumerik 828D Alarm Codes Guide | Complete Diagnostic Reference | — | Fix → |
| Siemens SINUMERIK Alarm 25000 | Drive Fault Fix | — | Fix → |
| Siemens Sinumerik Alarm 380500 | Causes & Fix | — | Fix → |
| Siemens SIPROTEC Protective Relay Faults: Complete Guide | Siemens SIPROTEC relay faults and diagnostic messages. Hardware, communication, and protection faults with technician-level troubleshooting steps. | — | Fix → |
| Siemens VFD F0002 Fault | Overvoltage: What It Means and How to Fix It | — | Fix → |
| Siemens VFD F1 Fault (SINAMICS V20 Overcurrent): Causes, Codes, Fix | F1 fault on a Siemens SINAMICS V20 VFD means overcurrent. Step-by-step diagnosis of motor winding faults, short circuits, and ramp settings that trip F1 — with parameter numbers and OEM part references. | — | Fix → |
| Siemens VFD Fault Codes | SINAMICS G120, V20, S120 Guide | — | Fix → |