Yaskawa Error Code A910 Link -

Error Code: A910
Designation: Overload Warning (Electronic Thermal Alarm)
Severity: Warning (The drive remains operational but is at risk of a future trip).
System Family: Yaskawa AC Drives (Varispeed G7, A1000, V1000, GA700, etc.)

Error code A910 is a predictive maintenance alert. It signals that the motor current has exceeded the safe threshold defined by the motor protection parameters, but it has not yet reached the critical level required to trip the drive (which would trigger error A920 or A950).

This feature effectively tells the operator: "The motor is running hot; reduce the load or check the system before the drive shuts you down."

The A910 alarm has a sub-code that tells you why the link failed. To access it:

Common sub-codes:

If you have a second identical drive or known-working option card:

| Parameter | Setting | Effect | |-----------|---------|--------| | L8-07 | 0 | Disables output phase loss detection (not recommended) | | L8-07 | 1 | Enables detection (default) | | L8-07 | 2 | Enables detection with faster response |

Check parameter U1-03 (Output Current) or U1-04 (Output Voltage).

✅ Clarity: The error is clearly communication-related.
⚠️ Difficulty: Requires basic parameter checking and cabling inspection – moderate for inexperienced users.
🔧 Fixability: Often solved by reseating cables or adjusting parameters; hardware failure less common.
📘 Documentation: Yaskawa manuals provide good diagnostic steps.

Final rating: ⭐⭐⭐⭐ (4/5) – predictable error with a logical troubleshooting path, though noise issues can be tricky.

Yaskawa error code 0910 indicates a critical CPU error in Motoman controllers, specifically targeting the YCP01 board on DX100 systems or the CPU-201R board on FS100 systems. Troubleshooting involves cycling power, checking board seating, and assessing the power supply, as this major fault prevents normal robot operation. Read the full technical breakdown at Yaskawa Motoman Knowledge Center. DX100 ALARM CODE 0910 CPU ERROR (YCP01)

The Yaskawa error code A.910 is an Overload Warning (pre-alarm) primarily found in Sigma-series servo drives (Sigma-3, Sigma-5, and Sigma-7). It serves as a precursor to more severe faults like A.710 (instantaneous overload) or A.720 (continuous overload).  Error Summary 

Definition: The drive has detected that the motor is approaching its overload protection limit. yaskawa error code a910 link

Behavior: In many configurations, the drive will continue to run while the alarm flashes, but it will trip (stop) if the load is not reduced.  Common Causes & Troubleshooting  Potential Cause  Recommended Action Excessive Mechanical Load

Check for mechanical jams, binding, or friction in the system. Incorrect Wiring

Inspect the servomotor and encoder wiring for loose contacts or incorrect phases. Tight Duty Cycle

The operation pattern (acceleration/deceleration) may exceed the motor’s rated capacity. Parameter Settings

Check Pn52B (Overload Warning Level). If set too low, it triggers the warning prematurely. Environmental Heat

High temperatures inside the SERVOPACK panel (above 55°C) can trigger thermal-related warnings. Hardware Failure

If the load is normal and wiring is secure, the internal current detection circuit in the SERVOPACK may be faulty. Recommended Tools 

SigmaWin+: Use this software to monitor the accumulated load ratio (Un009) and view the alarm trace to see exactly when the overload occurs.

Yaskawa Manuals: Refer to the specific troubleshooting manual for your drive series (e.g., Sigma-7 Troubleshooting Manual) for detailed parameter lists.  To help you further, could you let me know:  Which drive series are you using (e.g., Sigma-7, Sigma-5)?

Is this happening during startup or while the machine is running?

Have there been any recent mechanical changes to the machine?  Σ-7C SERVOPACK - Troubleshooting Manual

While "A910" is commonly mistaken for a Yaskawa code, it is actually a frequent alarm on Siemens SINAMICS and Micromaster drives. On these systems, indicates that the Vdc-max controller has been deactivated because the DC-link voltage has exceeded its limits. Troubleshooting the A910 Alarm The A910 alarm has a sub-code that tells

The drive issues this warning when it can no longer keep the DC-link voltage within a safe range, often causing the motor to go into regenerative mode. Check Input Voltage

: Ensure the main supply voltage (parameter P0210) is within the drive's rated range and not permanently too high. Active Loads

: Verify if the motor is being driven by an active load, which pushes the system into regenerative mode. High Inertia

: Check for high load inertias during deceleration. If the ramp-down time is too short, the DC-link voltage will spike. Parameter Settings : Ensure parameter

(Vdc controller configuration) is set correctly for your application. Related Yaskawa Fault Codes

If you are certain you are working with a Yaskawa drive, you may be looking for one of these similar-sounding codes: Ad0 (Position Error Pulse Overflow)

: Often misread as A910, this occurs when the position error exceeds the allowable limit. A.81 (Encoder Disconnected) : A common alarm on Yaskawa SGDH ServoPacks. OL1 / OL2 (Overload)

: Indicates the motor or drive has exceeded its rated current capacity for too long. oH1 (Heatsink Overheat)

: The drive's internal temperature has exceeded safe levels.

For official Yaskawa documentation, you can search for your specific model's manual on the Yaskawa Technical Document Library so I can find the exact manual for you? 6.3 Drive Alarms, Faults, and Errors

In the Yaskawa ecosystem—specifically for Sigma series servo drives—the error code A.910 is an Overload Warning.

It serves as a preemptive alert that the motor is approaching a critical overload state (Alarms A.710 or A.720). If you ignore it and keep running, the drive will eventually trip a full fault to protect the hardware. Common Causes Common sub-codes: If you have a second identical

Mechanical Overload: The physical load on the motor is too heavy or has become stuck due to mechanical issues.

Wiring Faults: Incorrect or loose wiring at the motor or encoder can trigger this warning.

Capacity Mismatch: The motor may be undersized for the required torque/operating conditions.

High Ambient Temperature: If the temperature inside the control panel exceeds 55°C, it can lead to heat-induced overload warnings.

Incorrect Parameter Settings: The "Overload Warning Level" (Pn52B) might be set too low for your specific application. How to Fix It

Check Mechanics: Ensure there are no jams, binding, or excessive friction in your machine.

Verify Wiring: Inspect the motor and encoder cables for any damage or poor connections.

Adjust Parameters: If the load is naturally high but within safety limits, you can adjust the warning threshold using parameter Pn52B.

Cooling: Ensure the control panel has proper ventilation and that the drive's heat sink is clean.

Isolate the Issue: Disconnect the motor from the load and run it alone. If the warning persists, the issue is likely within the drive (SERVOPACK) or the motor itself.

For detailed wiring diagrams or specific parameter lists, you can refer to the Yaskawa Sigma-7 Troubleshooting Manual.

Are you seeing this warning constantly or only during specific parts of your machine's cycle? Σ-7C SERVOPACK - Troubleshooting Manual