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michelle26Aug 25, 2025
Why does my YASKAWA CIMR-V BA0001B Controller show a DC overvoltage error?
- TtsmithAug 25, 2025
A DC overvoltage error on your YASKAWA Controller indicates that the DC bus voltage has risen too high. This can occur due to several reasons: * The deceleration time is too short. * Stall prevention is disabled. * The braking chopper or resistor is broken. * Unstable motor control in Open Loop Vector mode. * Too high input voltage. To resolve this, try the following: * Increase the deceleration time. * Enable stall prevention by adjusting parameter L3-04. * Ensure the braking resistor and braking chopper are functioning correctly. * Check the motor parameter settings and adjust torque and slip compensation, AFR, and hunting prevention as needed. * Verify that the power supply voltage meets the drive's specifications.