Yaskawa Error Code A910 Link Repack 📢

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 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. yaskawa error code a910 link

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

The Yaskawa A.910 error code indicates an Overload Warning. This is a cautionary status that precedes more critical overload alarms like A.710 (Instantaneous Overload) or A.720 (Continuous Overload). If the underlying cause is not addressed, the drive will eventually trip a full alarm to prevent the servomotor from overheating. Common Causes

Mechanical Load Issues: The motor is encountering more physical resistance than it is designed to handle, often due to binding, friction, or an oversized load.

Incorrect Wiring: Faulty contacts or incorrect wiring between the SERVOPACK, servomotor, or encoder can trigger this warning.

Operating Conditions: The motor is operating for extended periods at torques that exceed its ratings, or the starting torque required is too high.

Parameter Settings: The overload warning level (parameter Pn52B) might be set too low or is unsuitable for the current application.

Environmental Factors: Excessive heat within the SERVOPACK panel (above ) can contribute to overload conditions. Troubleshooting and Remedies

Check Mechanical Systems: Inspect the machinery for any physical obstructions, mechanical wear, or binding that could be increasing the motor's workload.

Verify Wiring: Ensure all power and encoder cables are securely connected and free of damage. Use the Yaskawa troubleshooting guide to verify correct pinouts. While "A910" is commonly mistaken for a Yaskawa

Adjust Parameters: If the mechanical load is within spec, check parameter Pn52B to ensure the warning threshold is appropriate for your operation.

Review Motor Capacity: If the load is consistently high, you may need to reconsider the load requirements or upgrade to a motor with a higher capacity.

Cooling: Ensure the SERVOPACK has adequate ventilation and that the internal cabinet temperature is maintained at safe levels. Reference for Related Alarms A.910 Overload Warning Pre-alarm (Warning) A.710 Instantaneous Overload Critical Alarm A.720 Continuous Overload Critical Alarm

For more detailed technical specifications on detection timing, refer to the Yaskawa Sigma-7 Manual. A.910 fault in Yaskawa Sigma 7 servo drive - Click2Electro

6. Summary of Key Parameters

| Parameter | Description | Role in A910 | | :--- | :--- | :--- | | L3-01 | Electronic Thermal Selection | Enables/Disables the protection feature that generates A910. | | L3-02 | Motor Rated Current | Critical. Sets the baseline for the overload calculation. Must match the motor nameplate. | | L3-03 | Electronic Thermal Time | Sets how long the motor can sustain an overload before the alarm/trip occurs. | | L3-04 | Overload Warning Level | Sets the percentage of current that specifically triggers the A910 warning (default is usually very close to the trip point). | | U1-03 | Monitor: Output Current | Used for real-time diagnostics to verify if the motor is actually drawing too many amps. |

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Step 5: Swap Test (Best for Diagnostics)

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

1. Move the suspected card to a known-good drive. If the problem follows the card → Replace the option card.
2. Move a known-good card to the problematic drive. If A910 persists → Replace the drive’s control board (or the entire drive).

Common causes

1. Physical layer issues

   • Faulty, loose, or damaged cables/connectors.
   • Incorrect cable type (e.g., using a straight cable where a crossover or shielded twisted pair is required).
   • Broken shielding or poor grounding causing EMI.

2. Power/boot sequencing

   • Devices powered in wrong order causing master/slave initialization failures.
   • Intermittent power to network interface modules.

3. Configuration mismatches

   • Incorrect communication parameters (baud rate, parity, stop bits).
   • Node/address conflicts or duplicate IDs on the bus.
   • Wrong protocol selection or incompatible firmware versions.

4. Network device failures

   • Failed network interface module (comms card) or I/O module.
   • Faulty master device, PLC, or switch/hub.

5. Topology & timing

   • Excessive network length, improper termination, or missing terminators.
   • Too many nodes or bus loading exceeding spec.
   • Network latency or timing violations (cycle time too short).

6. Software/firmware issues

   • Firmware bugs or mismatched firmware between devices.
   • Corrupted configuration or parameter set.

Scenario A: Conveyor System in a Food Plant

Symptom: A910 appears every Monday morning after a weekend washdown. Root Cause: Humidity condensation on the option card pins. Fix: Installed dielectric grease on the card edge and changed the drive location from below the wash zone to a NEMA 4X enclosure.

Feature Report: Yaskawa Error Code A910 (Overload Warning)

Common Causes & Troubleshooting Steps

If you are facing this code, follow this diagnostic workflow:

Step 3: Reseat the Option Card

1. Remove the retaining screws.
2. Gently wiggle the card upwards out of the slot using a card extractor tool (or carefully by hand).
3. Inspect the card edge connector. Look for black streaks (oxidation) or bent pins.
4. Clean the contacts: Use a soft eraser (like a classic pink pencil eraser) to gently rub the gold fingers, followed by isopropyl alcohol and a lint-free cloth.
5. Re-insert the card firmly until you feel a positive click or bottom-out. Tighten retaining screws evenly.

1. Executive Summary

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."

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