Troubleshooting steps
Check input power verify input voltage check power supply connections inspect fuses
Yaskawa VFD
UV1 – Under voltage
Main circuit under voltage
Details
Main circuit DC voltage dropped below minimum operating threshold.
Error typealarm
MeaningUnder voltage
Typical causesInput power loss low input voltage power supply fault
SolutionsCheck input power verify input voltage check power supply connections inspect fuses
Severityhigh
Catalog references
Vendor Information
YaskawaUV1
Utilities
Troubleshooting Steps
Related
Related Yaskawa VFD Codes
FAQ
Common questions
Will the drive restart automatically?
Depends on parameter settings. Usually requires manual reset after power restoration.
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