Rarely, a corrupted parameter set (especially after a poor upload/download operation) can misconfigure the current offset auto-calibration routine. This is more common after battery-backed memory failures.
Official Definition: According to Yaskawa technical documentation, error code A910 signifies a "Current Offset Fault" or "Current Detection Circuit Problem" (sometimes listed as oPE related in older models, but specifically A910 as a fatal hardware error in newer firmware). yaskawa error code a910
In simple terms, the drive has detected an inconsistency or failure in its internal circuitry that measures electrical current flowing to the motor. The drive includes current sensors (usually Hall Effect sensors or shunt resistors) that monitor output to protect the motor and the drive itself. When the drive powers up (or during a self-check), it expects to see near-zero current with the motor stopped. If the measured offset is above a predefined threshold, the drive triggers an A910 alarm. Rarely, a corrupted parameter set (especially after a
Key distinction: This is generally considered a minor alarm (drive continues operation if parameter settings allow) or a major fault (drive shuts down immediately), depending on the series. In most modern Yaskawa drives, A910 prevents the drive from starting to avoid potential damage. the drive will trip.
The most frequent cause is instability in the facility’s AC grid. Events include:
Key diagnostic: Monitor your facility’s incoming voltage during operation. If the line voltage drops below -15% of nominal, the drive will trip.