Code H66 — Yaskawa Error

Separate communication cables from high-voltage motor or input power lines.

To reset an H66 fault:

The H66 error code is a specific fault code that appears on Yaskawa servo drives, particularly on the Σ (Sigma) series. This error code indicates a problem with the servo drive's internal memory or the encoder's communication. When the H66 error code is displayed, it means that the servo drive has detected an error in the data transmission or reception between the encoder and the control circuit. yaskawa error code h66

Install a noise filter on the drive's input power side if interference persists. yaskawa error code h66