5.2 Fault Detectionu Fault Displays, Causes, and Possible SolutionsFaults 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.Table 5.2 Detailed Fault Displays, Causes, and Possible SolutionsDigital Operator Display Fault NameboL Braking Transistor Overload FaultThe braking transistor reached its overload level.bUSOption Communication Error• The connection was lost after establishing initial communication.• Only detected when the run command frequency reference is assigned to an option card.Cause Possible SolutionNo signal was received from the PLC • Check for faulty wiring.• Correct the wiring.• Check for disconnected cables and short circuits and repair as needed.Faulty communications wiring or an existingshort circuitCommunication data error occurred due tonoise• Check the various options available to minimize the effects of noise.• Counteract noise in the control circuit, main circuit, and ground wiring.• Ensure that other equipment such as switches or relays do not cause noise. Use surge absorbers ifnecessary.• Use only recommended cables or other shielded line. Ground the shield on the controller side or thedrive input power side.• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drivepower supply input.The option card is damaged Replace the option card if there are no problems with the wiring and the error continues to occur.The option card is not properly connected tothe drive• The connector pins on the option card do not line up properly with the connector pins on the drive.• Reinstall the option card.Digital Operator Display Fault NameCE MEMOBUS/Modbus Communication ErrorControl data was not received for the CE detection time set to H5-09.Cause Possible SolutionFaulty communications wiring or an existingshort circuit• Check for faulty wiring.• Correct the wiring.• Check for disconnected cables and short circuits and repair as needed.Communication data error occurred due tonoise• 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 thedrive input power side.• Ensure that other equipment such as switches or relays do not cause noise. Use surge suppressors ifrequired.• Separate all communication wiring from drive power lines. Install an EMC noise filter to the drivepower supply input.Digital Operator Display Fault NameCFControl FaultThe torque limit was reached continuously for three seconds or longer while ramping to stop in OLVControl.or CPF11 to CPF14CPF16 to CPF19 Control Circuit ErrorCPF02 A/D Conversion ErrorAn A/D conversion error or control circuit error occurred.CPF03 Control Board Connection ErrorConnection error between the control board and the driveCPF06 EEPROM Memory Data ErrorAn error in the data saved to EEPROM5.2 Fault DetectionYASKAWA ELECTRIC TOEP C710616 41B YASKAWA AC Drive - A1000 Quick Start Guide 1295 Troubleshooting
