YASKAWA UAK series User Manual

Contents

YASKAWA UAK series User Manual Manual pdf 296 page image

11 Inspection, Maintenance, and Troubleshooting11-4211.5 Troubleshooting Malfunction Based on Operation andConditions of the MotorTroubleshooting for the malfunctions based on the operation and conditions of the motor is provided in thissection.Be sure to turn OFF the servo system before troubleshooting items shown in bold lines in the table.Problem Probable Cause Investigative Actions Corrective ActionsMotor Does NotStartThe control power supply is notON.Check voltage between controlpower terminals. Correct the wiring.The main circuit power supply isnot ON.Check the voltage between maincircuit power terminals. Correct the wiring.Wiring of I/O signal connector CN1faulty or disconnected.Check if the connector CN1 is prop-erly inserted and connected.Correct the connector CN1 connec-tion.Motor or encoder wiring discon-nected. Check the wiring. Correct the wiring.Overloaded Run under no load and check theload status.Reduce load or replace with largercapacity motor.Settings for the input signal selec-tions (Pn50A and Pn50B) is incor-rect.Check the settings for parametersPn50A and Pn50B.Correct the settings for parameterPn50A and Pn50B.Motor type differs from parametersetting (Pn01E.0).Check the settings for parameterPn01E.0.Set parameter Pn01E.0 to the motortype being used.Encoder type differs from parame-ter setting (Pn01F.0).Check the settings for parameterPn01F.0.Set parameter Pn01F.0 to theencoder type being used.SV_ON command (Enable opera-tion) is not sent.Check the command sent from thehost controller.Send the SV_ON command (Enableoperation).The forward run prohibited (P-OT)and reverse run prohibited (N-OT)input signals are turned OFF.Check P-OT or N-OT input signal. Turn P-OT or N-OT input signalON.The safety input signal (/HWBB1 or/HWBB2) remains OFF.Check the /HWBB1 and /HWBB2input signal.Set the /HWBB1 and /HWBB2input signal to ON.SERVOPACK failure − Replace the SERVOPACK.Motor MovesInstantaneously,and then StopsServomotor wiring is incorrect. Check the motor wiring. Correct the wiring.Encoder wiring is incorrect. Check the encoder wiring. Correct the wiring.Motor SpeedUnstableWiring connection to motor isdefective.Check connections of power line(phases U, V, and W) and encoderconnectors.Tighten any loose terminals or con-nectors and correct the wiring.Motor RotatesWithoutReference InputSERVOPACK failure − Replace the SERVOPACK.Dynamic BrakeDoes Not OperateImproper Pn001.0 setting Check the setting for parameterPn001.0.Correct the setting for parameterPn001.0.Improper Pn01E.1 setting Check the setting for parameterPn01E.1.Correct the setting for parameterPn01E.1.Improper Pn601 setting Check the setting for parameterPn601.Correct the setting for parameterPn601.External DB circuit fault Check the wiring and componentsfor external DB circuit.Correct the wiring for external DBcircuit, or replace the components.DB resistor disconnectedCheck if excessive moment of iner-tia, motor overspeed, or DB fre-quently activated occurred.Replace the SERVOPACK, andreduce the load.DB drive circuit fault −There is a defective component inthe DB circuit. Replace the SER-VOPACK.