YASKAWA SI-EP3 Technical Manual

Also see for SI-EP3: Technical manual Installation manual Technical manual Installation manual

Contents

10 TroubleshootingYASKAWA ELECTRIC SIEP C730600 89C YASKAWA AC Drive Option SI-EP3 Technical Manual 5110 Troubleshooting Drive-Side Error CodesDrive-side error codes appear on the drive keypad. Table 30 lists causes of the errors and possible corrective actions.Refer to the drive Technical Manual for additional error codes that may appear on the drive keypad. FaultsBoth bUS (Option Communication Error) and EF0 (Option Card External Fault) can appear as either an alarm or as afault. When a fault occurs, the keypad ALM LED remains lit. When an alarm occurs, the keypad ALM LED flashes.Check the following items first when an error code occurs on the drive:• Communication cable connections• Make sure the option is properly installed to the drive• Operation status of the controller program and controller CPU• Did a momentary power loss interrupt communications?Table 30 Fault Displays, Causes, and Possible SolutionsKeypad Display Fault NamebUSOption Communication Error• After establishing initial communication, the connection was lost.• Only detected when the run command frequency reference is assigned to the option(bl-01 = 3 or bl-02 = 3).Cause Possible SolutionNo signal was received from the PLC. • Check for faulty wiring.• Correct any wiring problems.Faulty communications wiring.An existing short circuit orcommunications disconnection. Check disconnected cables and short circuits and repair as needed.A data error occurred due to electricinterference.• Counteract noise in the control circuit, main circuit, and ground wiring.• If a magnetic contactor is identified as a source of noise, install a surge absorber to the contactor coil.• 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.• Counteract noise in the master controller (PLC).The option is not properly connected tothe drive. Reinstall the option.Option is damaged. If there are no problems with the wiring and the error continues to occur, replace the option.Keypad Display Fault NameEF0 Option Card External FaultThe alarm function for an external device has been triggered.Cause Possible SolutionAn external fault was received from thePLC.1. Remove the cause of the external fault.2. Reset the external fault input from the PLC.Problem with the PLC program. Check the PLC program.Keypad Display Fault NameoFA00 Option Card Connection Error (CN5-A)Option is not properly connected.Cause Possible SolutionThe option card installed into portCN5-A is incompatible with the drive.Connect the option to the correct option port.Note: PG option cards are supported by option ports CN5-B and CN5-C only.Keypad Display Fault NameoFA01 Option Card Fault (CN5-A)Option is not properly connected.Cause Possible SolutionThe option connected to option portCN5-A was changed during run. De-energize the drive and plug the option into the drive according to Installation Procedure on page 12.