Yaskawa Error Code A910 Today

Always start with the simple things—measure your incoming voltage, tighten all connections, and disable momentary power loss ride-thru as a diagnostic step. Do not repeatedly reset the alarm without investigating; each undervoltage event stresses the drive’s front-end components.

is officially defined by Yaskawa as Main Circuit Undervoltage . This alarm triggers when the DC bus voltage inside the drive drops below the specified threshold. For a 200V class drive, this typically occurs below approximately 190 VDC (or around 150 VDC for single-phase models). For a 400V class drive, the undervoltage threshold is roughly 380 VDC to 400 VDC, depending on the model and load conditions. yaskawa error code a910

The drive constantly monitors the DC bus voltage. If that voltage dips below the drive’s minimum operating threshold, it cannot guarantee proper output to the motor. This triggers . Always start with the simple things—measure your incoming