Cause : Control Circuit Error (EEPROM memory Data Error) comes when the drive power supply was de-energized while a communication option entered a parameter Write command. An EEPROM peripheral circuit error occurred.

CPF06 is a fault code indicating an error with the EEPROM memory data in a Yaskawa drive. EEPROM stands for Electrically Erasable Programmable Read-Only Memory. It's a type of non-volatile memory that retains data even when the power is off. In Yaskawa drives, the EEPROM stores important configuration parameters for the drive's operation.

Here's what a CPF06 fault signifies:

• Data Error: The data saved in the EEPROM is corrupt or invalid. This can prevent the drive from functioning correctly.

Possible Causes of CPF06 Fault:

• Power Loss During Parameter Save: If the power supply to the drive was interrupted while it was saving new parameters, it could corrupt the data in the EEPROM.
• Control Board or Terminal Board Issue: A problem with the control board or terminal board, which might store some parameters, could lead to mismatched data and cause the CPF06 fault.
• Control Circuit Damage: Less commonly, damage to the control circuit itself could result in EEPROM data errors.

Troubleshooting Steps for CPF06 Fault:

Here are some recommended steps to troubleshoot a CPF06 fault in a Yaskawa drive :

1. Turn Off and On the Drive: Simply cycling the power by turning the drive off and then on again can sometimes resolve minor glitches that might have caused the fault.
2. Check Connections: Visually inspect the control board and terminal board for any burn marks or physical damage. Re-seat the boards if necessary.
3. Reset Parameters: Yaskawa drives have a parameter that allows initializing the control board (and potentially the terminal board). This can reset the EEPROM data to factory defaults. There might be dedicated parameters for 2-wire or 3-wire initialization .