Follow this systematic approach to resolve A910. Always follow Lockout/Tagout (LOTO) procedures before opening the drive enclosure.
Some parameters affect A910 sensitivity:
Many Yaskawa drives have a hidden or semi-hidden routine to auto-calibrate the current sensors. This is often the only fix without hardware repair.
For GA800 and GA700:
For A1000 and V1000:
When the drive is initially powered on, a "soft-charge" resistor limits inrush current to charge the DC bus capacitors. Once charged, a relay or thyristor bypasses this resistor. If the bypass fails:
Another possibility: One or more diodes in the three-phase rectifier bridge have failed, reducing the average DC output. yaskawa error code a910
A: This is a classic symptom of a failing current sensor. Cold temperatures cause semiconductor materials to contract slightly, altering the offset voltage. As the drive warms up, the sensor may drift back into acceptable range temporarily. The sensor still needs replacement.
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. Follow this systematic approach to resolve A910
If after performing Steps 1-5 you still see error code A910, you likely have a physical component failure. The repair requires:
In many cases, the cost of repair (especially for drives under 7.5kW) approaches the cost of a new drive. Yaskawa’s flat-rate repair service or an authorized repair center (e.g., Drives Warehouse, Radwell, or Yaskawa direct) is the recommended route for hardware failure.