Yaskawa AC Drive Z1000 Bypass Technical Manual - Manual (Page 225)

The drive tried to adjust the current offset value
beyond the allowable range. This is due to residual
induction current in the motor (e.g., during sudden
deceleration or when coasting) when the drive
attempted to start the motor.
• Create a motor restart sequence that allows enough time for residual induction voltage to dissipate.
• Enable Speed Search at start (b3-01 = 1).
The current sensor in the drive is damaged
If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a Yaskawa
representative for instructions on replacing the control board.
HOA Keypad Display Fault Name
CPF00 or CPF01 Control Circuit Error
Cause Possible Solution
There is a self-diagnostic error in the control
circuit
• Cycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
Connector on the operator is damaged Replace the operator.
HOA Keypad Display Fault Name
CPF02
A/D Conversion Error
An A/D conversion error or control circuit error occurred.
Cause Possible Solution
Control circuit is damaged
• Cycle power to the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
HOA Keypad 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 off the power and check the connection between the control board and the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
Drive fails to operate properly due to noise
interference
• Check the various options available to minimize the effects of noise.
• 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
the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors
if required.
• Separate all communication wiring from drive power lines.
HOA Keypad Display Fault Name
CPF06
EEPROM Memory Data Error
Error in the data saved to EEPROM
Cause Possible Solution
There is an error in EEPROM control circuit
• Turn off the power and check the connection between the control board and the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
The power supply was switched off while
parameters were being saved to the drive
Reinitialize the drive using parameter A1-03.
HOA Keypad Display Fault Name
CPF07
Terminal Board Connection Error
CPF08
Cause Possible Solution
There is a faulty connection between the terminal
board and the control board
• Turn off the power and check the connection between the control board and the drive.
• If the problem continues, replace the control board or the entire drive. Contact Yaskawa or a
Yaskawa representative for instructions on replacing the control board.
HOA Keypad Display Fault Name
CPF20 or CPF21 Control Circuit Error
6.4 Fault Detection
YASKAWA ELECTRIC SIEP YAIZ1B 01D YASKAWA AC Drive – Z1000 Bypass Technical Manual 225
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Diagnostics & Troubleshooting