Digital Operator Display Fault Name
CPF03
Control Board Connection Error
Connection error between the control board and the drive
Cause Possible Solution
There is a connection error.
• Turn the power off and check the connection between the control board and the drive.
• If the problem continues, replace either the control board or the entire drive.
Drive fails to operate properly due to noise interference.
• Check the various options available to minimize the effects of noise.
• Take steps to counteract noise in the control circuit, main circuit, and ground wiring.
• Use only recommended cables or other shielded line. Ground the shield on the controller side or on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise and use surge suppressors if required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
Digital Operator Display Fault Name
CPF06
EEPROM Memory Data Error
There is an error in the data saved to EEPROM.
Cause Possible Solution
There is an error in EEPROM control circuit.
• Turn the power off and check the connection between the control board and the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
The power supply was switched off when parameters
were being saved to the drive.
Reinitialize the drive (A1-03).
Digital Operator Display Fault Name
CPF07
Terminal Board Connection Error
CPF08
Cause Possible Solution
There is a fault connection between the terminal board
and control board.
• Turn the power off and reconnect the control circuit terminal board.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
or
<1>
CPF20 or CPF21 Control Circuit Error
Cause Possible Solution
Hardware is damaged.
• Cycle power to the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
CPF22
Hybrid IC Error
Cause Possible Solution
Hybrid IC on the main circuit is damaged.
• Cycle power to the drive. Refer to Diagnosing and Resetting Faults on page 334.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
CPF23
Control Board Connection Error
Connection error between the control board and the drive
Cause Possible Solution
Hardware is damaged.
• Turn the power off and check the connection between the control board and the drive.
• If the problem continues, replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
CPF24
Drive Unit Signal Fault
The drive capacity cannot be detected correctly (drive capacity is checked when the drive is powered up).
Cause Possible Solution
Hardware is damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or your
nearest sales representative.
Digital Operator Display Fault Name
to
CPF26 to CPF34
Control Circuit Error
CPU error
Cause Possible Solution
Hardware is damaged.
Replace either the control board or the entire drive. For instructions on replacing the control board, contact Yaskawa or your
nearest sales representative.
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