Troubleshooting steps
Check input power verify input voltage check power supply connections verify fuses
Siemens VFD
F30003 – Undervoltage fault
DC bus voltage too low
Details
DC bus voltage drops below minimum operating level.
Error typefault
MeaningUndervoltage
Typical causesInput power loss input voltage too low power supply fault
SolutionsCheck input power verify input voltage check power supply connections verify fuses
Severityhigh
Catalog references
Vendor Information
SiemensF30003
Utilities
Troubleshooting Steps
Related
Related Siemens VFD Codes
FAQ
Common questions
Can I continue operation?
No. Undervoltage can damage the drive. Fix power supply before restarting.