If you have replaced the 24V supply, disconnected all loads, reseated all connections, and still get A910 on a drive less than 3 years old, you likely have a manufacturing defect. Contact Yaskawa technical support with the following data:

Yaskawa’s support team may ask you to perform a – removing the control board and powering it separately on a bench supply. If the undervoltage persists, they will authorize a warranty replacement.

The Yaskawa error code is an Overload Warning (not a hard fault) primarily associated with the Sigma-series servo drives (such as Sigma-5 and Sigma-7). It serves as a preventative alert that the motor is approaching its thermal limit. What Does A.910 Mean?

: Unlike hard faults, alarms/warnings often clear automatically once the cause is removed. You can also try pressing the RESET key on the digital operator or cycling the drive's power. 6.3 Drive Alarms, Faults, and Errors

Many Yaskawa drives (especially the GA800 and A1000 series) have a control power input terminal (often labeled +24V and AC ). If you are powering the drive’s control board from an external 24V DC power supply—commonly done to keep the control logic alive while the main power is off—a failing supply can cause A910. The voltage must be between 21.6V and 26.4V DC. Anything below 21V will trigger the alarm.

Ensure the SERVOPACK cooling fans are functioning and the cabinet ventilation is clear.