Applicable Systems
S7-1200
S7-1500
S7-300
S7-400
LOGO!
SINAMICS
Symptoms
DC link undervoltage: supply voltage too low.
Possible Causes
- Input voltage too low
- Input phase loss
- Transient power interruption
Troubleshooting Steps
- Step 1: Measure input voltage
Voltage within rated range - Step 2: Check input fuses and connections
All fuses intact, connections tight - Step 3: Verify DC link voltage
Voltage above threshold
How to Reset
Auto-reset when voltage returns or reset via panel.
Comments (0)
Share your experience to help others facing the same problem.
Leave a Comment
Source: Siemens SINAMICS G120 List Manual
Category: PLC & VFD
No comments yet. Be the first to share your experience!