Fault Detection; Fault Detection; Fault Displays, Causes, And Possible Solutions - YASKAWA L1000V Technical Manual

6.3 Fault Detection

6.3

Fault Detection

u Fault Displays, Causes, and Possible Solutions
Faults are detected for drive protection, and cause the drive to stop while triggering the fault output terminal MA-MB-
MC. Remove the cause of the fault and manually clear the fault before attempting to run the drive again.
Digital Operator Display
Cause
Motor parameters are improperly set.
Torque limit is too low.
Load inertia is too big.
Digital Operator Display
Cause
While the drive automatically adjusted the current
offset, the calculated value exceeded the allowable
setting range.
Digital Operator Display
CPF00 or CPF01
or
Cause
There is a self diagnostic error in control circuit.
Connector on the operator is damaged.
Digital Operator Display
Cause
Control circuit is damaged.
Digital Operator Display
Cause
There is a connection error.
Drive fails to operate properly due to noise interference.
Digital Operator Display
Cause
There is an error in EEPROM control circuit.
The power supply was switched off while parameters
were being saved to the drive.
Power to the control board was lost while writing
parameter settings during Rescue Operation.
Digital Operator Display
Cause
There is a faulty connection between the terminal board
and control board.
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Table 6.7 Detailed Fault Displays, Causes, and Possible Solutions
CF Control Fault
The torque limit was reached continuously for three seconds or longer while ramping to stop in OLV Control.
Check the motor parameter settings and repeat Auto-Tuning.
Set the torque limit to the most appropriate setting (L7-01 through L7-04).
• Adjust the deceleration ramp (C1-02, -04, -06, -08).
• Set the speed reference to the minimum value and interrupt the Up/Down command when the drive finishes decelerating.
CoF Current Offset Fault
The current detection circuit is damaged, or there was residual induction voltage in the motor (such as 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
• Lengthen the active deceleration ramp (C1-02, -04, -06, -08)
Control Circuit Error
• Cycle power to the drive.
• Set the frequency to the minimum value and interrupt the Run command when the drive finishes decelerating.
• Replace the operator.
A/D Conversion Error
CPF02
An A/D conversion error or control circuit error occurred.
• 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.
Control Board Connection Error
CPF03
Connection error between the control board and the drive
• 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.
• 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 on the drive input power side.
• Ensure that other equipment such as switches or relays do not cause noise and use surge absorbers if required.
• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drive power supply input.
EEPROM Memory Data Error
CPF06
An error in the data saved to EEPROM
• 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.
Reinitialize the drive (A1-03).
Reinitialize the drive (A1-03).
CPF07
Terminal Board Connection Error
CPF08
• 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.
YASKAWA EUROPE SIEP
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Possible Solution
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YASKAWA AC Drive L1000V Technical Manual