Cause : Current Offset Fault comes when drive starts operation while the current-detection circuit failure, or the induced voltage remains in the motor (coasting and after rapid deceleration).

1. The drive performed a current offset adjustment while the motor was rotating.

• The set value exceeds the allowable setting range while the drive automatically adjusts the current offset. This happens when attempting to restart a PM motor that is coasting to stop.
• Set b3-01 to 1 to enable Speed Search at Start.
• Perform Speed Search 1 or 2 (H1-XX = 61 or 62) via one of the external terminals.

Note: Speed Searches 1 and 2 are the same when using OLV/PM.

2. Hardware problem : If the problem continues, replace the control board or the entire drive.