A defective connection in the motor or encoder wiring can create resistance, signal distortion, or power irregularities. This forces the servo to overcompensate during operation, drawing excessive current to maintain performance and generating the A.910 overload warning. In some cases, as noted by industrypart.com, unstable control due to a faulty phase can cause the A.910 warning, indicating servo anomalies that require a thorough check of the current path.
The overload warning level parameter ( Pn52B ) is set too low for normal operation.
Improper inertia ratio or gain tuning parameters ( ) in the Sigma Series SERVOPACK.
Understanding and Troubleshooting Yaskawa Error Code A910 Exclusive
Use a multimeter to measure the phase resistance across the U, V, and W lines, checking for any severe imbalance. Step 3: Monitor Running Torque via Software
Use a high-quality Uninterruptible Power Supply (UPS) or regulated 24 Vdc supply for your drive control circuits to eliminate voltage sags that confuse the internal microprocessors.
Resolving this code promptly is essential to avoid forced machine downtime. This feature guide breaks down the causes, diagnostic steps, and remedies for the A.910 error. 🔍 Quick Reference: A.910 Overview Alarm Name Overload Warning Yaskawa Sigma-5 / Sigma-7 Series SERVOPACKs Primary Meaning
Verify that all phases (U, V, W) are firmly connected at both the motor and the servo pack. How to Clear the A.910 Warning
When the A910 warning appears on your Yaskawa V1000, A1000, or Sigma series drive, follow these troubleshooting steps to identify the root cause: 1. Monitor Load Data
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.
To resolve the issue quickly, it helps to know what typically causes the servomotor to work harder than it should. The root causes generally fall into four categories: 1. Mechanical Binding and Friction
Check for any obstructions, broken bearings, or lack of lubrication in the system that could be increasing mechanical resistance.
To fix this exclusively, you must understand the root physics behind the error. Here are the four definitive causes:
It signals an internal timing, communication, or sequence anomaly that requires attention before it escalates into a hard fault. Primary Causes of Error Code A910
Because A.910 is a warning, it can sometimes disappear on its own once the load is reduced. However, if it requires a manual reset, you can: on the motor. Turn the control power OFF and ON to reset the drive.
| Scenario | Repair Cost | Success Rate | Recommended Action | | :--- | :--- | :--- | :--- | | Ripple on +5V > 100mV | $200 (re-cap) | 90% | Send control board to electronics repair shop. | | Operator works on other drive | $75 (new JVOP) | 100% | Replace digital operator. | | Operator fails on multiple drives | $400+ | 10% | Inspect main power ground; replace bonding jumpers. | | FFC cable wiggling causes error | $15 (cable) | 99% | Replace FFC cable (part # EC0A234...). | | Drive is GA800 with old FW | $0 (update) | 95% | Update firmware to v7.11 or later. |
This article provides a comprehensive overview of what the A910 error means, why it occurs, and how to troubleshoot and fix it. What is Yaskawa Error Code A910 (Exclusive Error)?
