Yaskawa Error Code A910 Exclusive 〈TRUSTED〉

In Yaskawa Sigma-series servo drives (including Sigma-3, 5, and 7), the A.910 error code indicates an Overload Warning.

Yaskawa Error Code A910: Understanding the “Exclusive” Alarm

In the world of industrial automation, Yaskawa drives (specifically the GA800, GA700, A1000, and U1000 series) are known for their reliability. However, when an error code appears, it demands immediate attention. Among the various alarms, Error Code A910 stands out as particularly “exclusive” due to its specific cause: it is a hardware-exclusive alarm related to the drive’s charging circuit.

Symptoms of Yaskawa Error Code A910 Exclusive yaskawa error code a910 exclusive

The Core Meaning: What is "Exclusive"?

In Yaskawa terminology, the A910 error does not usually indicate a broken component. Instead, it indicates a conflict of priorities.

This piece explores the mechanics of the A910 code, why the "Exclusive" label is applied, and the necessary steps to resolve it. In Yaskawa Sigma-series servo drives (including Sigma-3, 5,

1. Power cycle correctly – Remove main power, wait for the keypad display to go blank (usually 5+ minutes for DC bus discharge), then reapply power. If A910 returns immediately, hardware is likely faulty.
2. Measure DC bus voltage – With a meter, check between terminals B1 and (-). If voltage is near zero but AC input is good, the pre-charge circuit is not closing.
3. Check input power quality – Ensure voltage is within spec (±10% of rated) and all three phases (for three-phase drives) are present during startup.
4. Inspect for external DC loads – If you have a common DC bus setup or external braking resistor, disconnect them temporarily to isolate the drive.

If the conditions causing A.910 are ignored and operation continues, the drive will eventually shut down with one of the above errors to protect the motor and internal circuitry. Common Causes Excessive Load

The A910 exclusive error code is a specific fault code that appears on Yaskawa servo drives, particularly on the Σ (Sigma) series. This error code indicates a problem with the servo drive's internal memory or the encoder's communication. When the servo drive detects an error, it immediately stops the motor and displays the A910 error code on the drive's display panel. The "exclusive" term refers to the fact that this error code is specific to certain Yaskawa servo drive models. Power cycle correctly – Remove main power, wait

Cause: The motor is operating under a torque that significantly exceeds its ratings for several seconds to minutes. Common Factors: