He knew was the "Overload Warning". It meant the motor was drawing more torque than it was rated for, but hadn't yet reached the breaking point where it would trigger a hard fault (A.710 or A.720) and crash the line. The drive was giving him a chance to fix it before the thermal protection kicked in. The Investigation
Always keep your Yaskawa drive manual handy. The exact parameter numbers and reset procedures vary slightly between drive series, so cross-reference this guide with your specific model’s technical documentation.
The clock on the wall of the automotive plant read 2:14 AM when the line stuttered.
After checking the likely cause, reset the alarm. Acknowledge the warning via the control system or by cycling power to the drive. Then run the machine at a low speed, monitoring the drive's output torque monitor. If the torque is near 100% during normal operation, your system is undersized.
Unlike a fault code, an alarm or warning like A910 does not always stop the motor immediately. However, it prevents the system from executing specific functions, such as auto-tuning or advanced positioning. Understanding the root causes of this error allows you to resolve it quickly and minimize system downtime. Primary Causes of Error Code A910 yaskawa error code a910
servo drive is the heart of the operation. One afternoon, the display suddenly flickers with the code
If safe, mechanically decouple the motor from the load. Run the motor alone. If the A910 disappears, the problem is with the load/mechanics. If the warning persists with no load, the problem is electrical: either the motor, the wiring, or the drive parameters.
If you encounter A.910, it’s also worth checking if A.911 appears alongside it, as a mechanical issue might be causing both warnings.
When she opened the MCC door, she saw the problem instantly. The main disconnect for the drive was on . The fuses looked fine. But the pilot light on the small control transformer was dark. He knew was the "Overload Warning"
: In rare cases, a failing SERVOPACK or motor internal encoder can trigger false or premature overload warnings. Troubleshooting and Remedies
He connected his laptop to the drive’s USB port, firing up the SigmaWin+ software. He needed to see the trace data. The code A910 meant the motor was drawing excessive current for a prolonged period, or the drive estimated that the thermal capacity of the motor was exceeded.
By responding to an A910 error code quickly and executing proper thermal care, you preserve the life of your Yaskawa VFD components and ensure your automated systems remain operational for years to come.
This article provides a comprehensive guide to understanding, troubleshooting, and resolving the . What is Yaskawa Alarm A.910? The Investigation Always keep your Yaskawa drive manual
Do not confuse A910 with these similar codes:
Which are you using (Sigma-5, Sigma-7, etc.)?
Disconnect the motor from the load and check if the machine moves freely.