Yaskawa Error Code H66

Temporarily switch from Closed Loop Vector (A1-02 = 2) to V/f Control (A1-02 = 0 or 1). If H66 stops, your encoder or vector tuning is the culprit. You can then re-tune vector control from scratch.

Ensure the cable connecting the digital operator to the drive is secure and shielded. In industrial environments, improper grounding of these cables often causes communication-related "H" faults.

A simple : Command a small position move forward, then backward. If you hear a “clunk” before motion, backlash is excessive. yaskawa error code h66

Sometimes a "software" mismatch causes the hardware to report a fault.

For detailed wiring diagrams or specific parameter adjustments, consult the official Yaskawa Technical Manuals or contact a certified Yaskawa Representative Yaskawa America for your specific motor and load? Temporarily switch from Closed Loop Vector (A1-02 =

H66 disappeared. Production resumed at 120 cuts/minute.

Frequent H66 errors are often a precursor to complete control board failure. For critical operations, it is advisable to keep a backup control board or a spare programmed drive on hand. Utilizing tools like the Yaskawa V1000 Fault History Ensure the cable connecting the digital operator to

Yaskawa drives rely on precise motor parameters. If you performed (T1-01 = 2 or 3) without the load properly decoupled, the drive’s inertia ratio (n8-55) or motor line-to-line resistance will be wrong. This causes overshoot.