In Yaskawa terminology, the "A" prefix designates an or Warning rather than a fatal trip. The A.910 code specifically points to Motor Overload . The drive calculates a thermal load based on the motor's current and operating time. When this value reaches the warning level (usually 80% to 100% of the maximum allowable overload), the A.910 warning triggers.

: Increased friction or a physical jam in the machinery is forcing the motor to work harder than usual.

: Increased friction in the mechanical system—such as worn bearings, jammed gears, or lack of lubrication—forces the motor to work harder than normal. Incorrect Gain Settings

Resolving the A910 exclusive error code requires a systematic approach. Here are some steps to help you troubleshoot and fix the issue:

Use Yaskawa’s SigmaWin+ software to monitor real-time torque and current usage to pinpoint exactly when the overload occurs.

: Verify all motor and encoder connections are secure and correct.

Several factors can cause the A910 exclusive error code to appear. Some of the most common causes include:

Ensure the drive chassis is connected to a low-impedance system ground.

For detailed technical specs, you can refer to the official Yaskawa Sigma-7 Troubleshooting Guide or explore the Sigma-5 Alarm Table for related codes. Yaskawa Servo Drive Alarm Codes Guide | PDF - Scribd

The simplest initial step is to power down the drive completely. Wait until the internal DC bus capacitors fully discharge (the charge LED turns off completely), then restore power. This resets the internal microprocessors and clears any transient buffer overflows. Step 2: Check and Isolate Option Cards

Remember that A.910 is a —an early opportunity to intervene before a minor issue becomes a major failure. Treat it as such, and your production uptime will reflect the diligence of your response.

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[A910 Warning Triggered] ──> [Address Root Cause / Let Drive Cool] ──> [Execute Clear Command] ──> [Normal Operation] A.910 fault in Yaskawa Sigma 7 servo drive - Click2Electro

For Sigma-7 series drives, A.910 corresponds to hex warning code .

Triggers a hard or A.720 overload alarm if unaddressed System Impact