If the fault stays with the original drive even after replacing the option card, the drive's main control board may have sustained a failure in its expansion slot circuitry. Prevention Strategies
: Test the communication cable for continuity or replace it with a known working cable to rule out physical damage. Address Noise :
The H66 error code can have significant consequences on the operation of the machine or process: yaskawa error code h66
If you're still experiencing issues or need further assistance, consult the Yaskawa user manual or contact a qualified Yaskawa support specialist for guidance.
Step-by-step diagnostic procedure
Observed symptoms
If you have exhausted all the steps above and H66 persists, professional intervention is needed. Contact Yaskawa support with the following ready: If the fault stays with the original drive
: Once the parameters are corrected, the error must be cleared. This is usually done by pressing the RESET key on the digital operator or cycling the drive's power.
Perform a using the drive’s software tool (DriveWizard or similar) to visualize overshoot. Perform a using the drive’s software tool (DriveWizard
: The digital operator itself or the drive's communication port is faulty. 2. Troubleshooting Steps