Yaskawa Error Code A910 File

Yaskawa technical manuals list "incorrect wiring or faulty contact of servomotor and encoder" as a primary cause of the A.910 warning.

Note: Back up your parameter sheet before performing an initialization. Prevention Best Practices

Do not confuse A910 with these similar codes: yaskawa error code a910

If your VFDs operate in highly dusty, humid, or oily environments, house them inside an appropriately NEMA-rated or IP-rated industrial enclosure equipped with its own filtered ventilation or air conditioning unit.

Unlike a fault code (such as "oF" or "oL"), which trips the drive and stops the motor instantly, an "A" prefix designates an . Key Characteristics of Alarm A910: Yaskawa technical manuals list "incorrect wiring or faulty

Replacement kits usually feature a click-in design requiring minimal tools.

This problem can occur spontaneously or after machine maintenance. Re-seating the connectors and checking for damaged pins should be the first step. Unlike a fault code (such as "oF" or

Before diving into fixes, it’s crucial to understand the "why." A Yaskawa AC drive operates by converting incoming AC power to DC via a rectifier (converter), storing that power in a large capacitor bank (DC bus), and then inverting it back to variable frequency AC.

In simple terms, the drive has detected an inconsistency or failure in its internal circuitry that measures electrical current flowing to the motor. The drive includes current sensors (usually Hall Effect sensors or shunt resistors) that monitor output to protect the motor and the drive itself. When the drive powers up (or during a self-check), it expects to see near-zero current with the motor stopped. If the measured offset is above a predefined threshold, the drive triggers an A910 alarm.