Uv4
Gate Drive Board Undervoltage
Yaskawa · J1000 AC Drive
What does Uv4 mean?
A voltage drop has occurred in the gate drive board circuit, indicating insufficient power supply to the board. This prevents the IGBTs from switching correctly, leading to immediate drive stoppage and potential damage if the underlying power issue is not resolved.
Complete Troubleshooting Guide
- 1
Cycle power to the drive. If the fault reoccurs after power cycling, replace either the gate drive board or the entire drive.
- 2
Contact Yaskawa or a Yaskawa representative for instructions on replacing the gate drive board.