While a "surge" is more common for overvoltage faults (A900), can occur immediately following a heavy regenerative event. When a motor decelerates too quickly, energy is pushed back into the drive. If the drive’s regenerative circuit or braking resistor isn't adequate, the DC bus voltage spikes, then crashes as the drive attempts to protect itself, sometimes leading to an undervoltage condition.
Gently spin the fan blades with a non-conductive tool. The blade should rotate freely without resistance or grinding noises. If it feels stiff or gritty, the bearings are shot. Step 2: Clean the Cooling Assembly
Have you already and just need help clearing the code? Share public link
When "A910" appears on the screen, it is technically classified as an alarm . The drive is telling you: "The cooling fan is operating below its designated speed, or it has stopped completely, but the internal temperatures are still within a safe operational limit." During an A910 alarm, the drive will typically continue running your motor, but the digital operator will flash the code as a warning. yaskawa error code a910
If you ignore the A910 warning and keep running the drive, the heat inside the chassis will rapidly build up. Once the heatsink reaches its maximum thermal threshold, the drive will trip on an oH1 (Overheat 1) fault. When a fault occurs, the drive immediately cuts power to the motor to prevent the Insulated Gate Bipolar Transistors (IGBTs) from melting.
There is friction or a jam in the mechanical system the motor is driving. Wiring/Encoder Issues:
If the error persists after testing cables and connections, the encoder within the motor may be faulty, requiring motor replacement or repair. Alternatively, the SERVOPACK itself may have a damaged internal circuit for CN2 . Summary of Actions for A910 Potential Issue Fixed Cycle Power Transient Error 2 Check CN2 Connectors Loose Connection 3 Replace Encoder Cable Worn Cable / Broken Wires 4 Check Grounding Electrical Noise (EMI) 5 Inspect Motor Encoder Failed Encoder While a "surge" is more common for overvoltage
The most common cause is damaged, worn, or incorrectly shielded encoder cables, often caused by repeated bending, abrasion, or excessive tension.
: High ambient temperature inside the SERVOPACK panel (exceeding 55∘C55 raised to the composed with power C
Error A910 is a crucial early warning signal. By methodically following these troubleshooting steps—checking your wiring, load, and parameters—you can address the root cause and often prevent a complete system shutdown. For complex issues or persistent warnings, always consult your official Yaskawa documentation or contact a qualified Yaskawa representative. Gently spin the fan blades with a non-conductive tool
Replacement kits usually feature a click-in design requiring minimal tools.
The most frequent cause is an unexpected physical resistance in the automated machinery.
Need immediate help? Contact Yaskawa America Technical Support at 1-800-927-5292 or your local authorized drive repair center.
The clock on the wall of the automotive plant read 2:14 AM when the line stuttered.
: The fault reset command will be ignored if a Run command is still active. Always make sure the Run command is OFF before attempting to reset.