The gate drive board (which controls the IGBTs) often contains the current feedback circuitry. Damage from moisture, dust, or vibration can cause short circuits or open traces that manifest as A910.
In the world of industrial automation, Yaskawa drives (including the popular V1000, J1000, GA700, GA800, and A1000 series) are renowned for their reliability and precision. However, like any sophisticated electronic device, they occasionally encounter issues that bring production lines to a halt. One of the most common yet frequently misunderstood alarms is Yaskawa error code A910.
If you are staring at a drive display flashing A910, you are likely experiencing frustration and urgency to get your machinery back online. This article provides a deep dive into everything you need to know about the A910 fault—what it means, why it happens, and, most importantly, how to fix it permanently.
While error codes vary, A910 appears prominently in the following series:
Note: In the older V7 or G5 series, similar functionality might be labeled as CF (Current Offset Fault). Always refer to your specific drive’s technical manual.
To effectively troubleshoot, you must identify the specific scenario under which the error appears. Below are the six most common root causes.
Yaskawa Error Code A910 is an undervoltage alarm of the main DC bus. While it can be a protective response to a brief power glitch, it often points to serious infrastructure issues: loose wires, undersized feeders, aging capacitors, or a failing soft-charge circuit.
Always start with the simple things—measure your incoming voltage, tighten all connections, and disable momentary power loss ride-thru as a diagnostic step. Do not repeatedly reset the alarm without investigating; each undervoltage event stresses the drive’s front-end components.
By understanding the root causes and following the structured troubleshooting guide above, you can minimize downtime, avoid unnecessary drive replacements, and ensure your Yaskawa automation system runs reliably for years to come.
Need more help? Yaskawa’s technical documentation for your specific drive series (Technical Manual TM.V1000.01, for example) contains detailed timing charts and waveform examples for A910 detection. Always keep the latest manual available for your exact drive revision.
Yaskawa error code A.910 is primarily a rather than a hard fault, indicating an Overload Warning in Yaskawa SERVOPACKs. LK Automation Limited yaskawa error code a910
It serves as a "pre-alarm" to notify you that the motor is approaching its limit and is about to trigger a critical overload alarm, such as (instantaneous maximum load) or (continuous maximum load). LK Automation Limited Key Details & Troubleshooting What it means
: The drive has detected that the motor is operating near its rated capacity for a sustained period. If the workload isn't reduced, the system will trip a full alarm and shut down. Common Causes Mechanical jams or increased friction in the machine.
Large load inertia combined with rapid acceleration or deceleration rates. Operating the motor beyond its rated output for too long. Recommended Actions Reduce the Load
: Lighten the mechanical workload or slow down the cycle time. Check Mechanics
: Inspect for binding, lubrication issues, or physical obstructions in the drivetrain. Adjust Parameters
: If the warning is triggering too early despite normal operation, review the overload warning level settings (e.g., Pn52b in some models) to ensure they match your application requirements. LK Automation Limited Other Variations If you are seeing
on a Yaskawa robot controller (like the FS100), it indicates a
related to the control board, which usually requires checking internal connections or replacing the CPU unit. Yaskawa Knowledge Center specific SERVOPACK model
you are using so I can provide the exact parameter list for that drive?
The Yaskawa A.910 error code is a common Overload Warning typically found on Sigma-series servo drives, such as the Sigma-7, Sigma-5, and Sigma-3. It serves as a pre-alarm notification that the motor or drive is operating near its thermal limit, allowing operators to intervene before a full shutdown (like an A.710 or A.720 fault) occurs. Understanding the A.910 Alarm The gate drive board (which controls the IGBTs)
Unlike a hard "Fault," the A.910 is classified as a Warning. This means the motor will generally continue to run, but the drive’s digital operator will flash the code to indicate that the operation has exceeded the overload protection characteristics. Primary Causes and Remedies Potential Cause Recommended Remedy Mechanical Obstruction
Check the machine for jams, excessive friction, or worn bearings that increase the physical load on the motor. Wiring Issues
Verify that the servomotor and encoder cables are correctly wired and that there are no faulty contacts or loose connections. Operational Overload
Reduce the operation speed, lower the cycle frequency, or decrease the overall load applied to the motor. High Ambient Temp
Ensure the SERVOPACK panel temperature is below 55°C. Check cooling fans and ventilation filters for clogs. Parameter Settings
Check parameter Pn52B (Overload Warning Level). If it is set too low for your application, it may trigger the warning prematurely. Troubleshooting Steps
Monitor Current Consumption: Use the drive's monitor mode (e.g., Un002 for torque reference) to see if the motor is consistently drawing current near its rated limit.
Clear the Warning: If the cause is temporary, you can often clear the warning by cycling the power or using a "Warning Reset" command via the digital operator or SigmaWin+ software.
Check Hardware Integrity: If the warning persists even with no load, the internal current detection circuit of the SERVOPACK may be faulty, requiring a replacement of the drive unit.
For robotic applications specifically using the FS100 controller, a similar code (0910) may indicate a CPU Error, typically requiring a controller restart or hardware inspection. Note: In the older V7 or G5 series,
A very specific question!
The Yaskawa error code A910 is a fault code that appears on Yaskawa servo drives, particularly on the Σ5 (Sigma 5) series. After conducting research, I found that:
Error Code A910: Servo Motor Overheating
The A910 error code indicates that the servo motor has overheated. This can occur due to various reasons such as:
Symptoms:
Troubleshooting steps:
Recommendations:
Rating:
Based on the information provided, I'd rate this error code review as follows: