Cause: Control Circuit Error comes when there is a communication issue between the drive and the keypad (digital operator).

cpf00 yaskawa indicates a Control Circuit Error. This means a communication issue between the drive and the keypad (digital operator). The drive's CPU and the keypad are not communicating properly.

Troubleshooting Steps:

Follow these steps to correct the cpf00 yaskawa:

• Power Cycle: Remove power from the drive completely and wait for the keypad to go blank.
• Check Keypad Connection: Ensure the keypad is firmly plugged into the drive. If an extension cable is used, try removing it or swapping it with a known working one.
• Inspect Connectors: Disconnect the keypad and check both the keypad and drive connectors for any dust, debris, or bent pins. Clean them carefully if necessary.
• Reconnect and Power On: Reconnect the keypad directly to the drive (without any extension cable if possible) and reapply power.
• Swap Keypad (if possible): If you have a spare keypad from a known working drive of the same model, try swapping it.