Digital Operator Display Fault Name
CF
Control Fault
The torque limit was reached continuously for three seconds after the Stop command was input and
deceleration was not possible in OLV Control.
Cause Possible Solution
Motor parameters are set improperly Check the motor parameter settings and repeat Auto-Tuning.
Torque limit is too low Set the torque limit to the most appropriate setting (L7-01 through L7-04).
Load inertia is too big
• Adjust the deceleration time (C1-02, C1-04, C1-06, C1-08).
• Set the frequency to the minimum value and interrupt the Run command when the drive finishes
decelerating.
Digital Operator Display Fault Name
or
CPF11 to CPF14
CPF16 to CPF19
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.
Digital Operator 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.
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 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 electrical
signal 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. Install an EMC noise filter to the drive
power supply input.
Digital Operator 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 (A1-03 = 2220, 3330).
Digital Operator Display Fault Name
CPF07
Terminal Board Connection Error
CPF08
Cause Possible Solution
2.4 Fault Detection
YASKAWA ELECTRIC SIEP YEAHHP 01B YASKAWA AC Drive – A1000 HHP Programming Manual
185
2
Troubleshooting
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