Sigma-II Series SGM*H/SGDH USER'S MANUAL - Esco Drives ...

10 Inspection, Maintenance, and Troubleshooting10.1.6 Troubleshooting of Alarm and WarningTable 10.6 Alarm Display and Troubleshooting (Cont’d)AlarmDisplayAlarm NameSituation at AlarmOccurrenceCauseCorrective ActionsA.41 Undervoltage ∗1(Detected whentheSERVOPACK’smain circuit DCvoltage is 170 Vor less.)(Detected whenthe power to themain circuit isturned ON.)Occurred when thecontrol power supplywas turned ON.Occurred when themain circuit powersupply was turnedON.Occurred duringnormal operation.A SERVOPACK board fault occurred.The AC power supply voltage is low.The fuse of the SERVOPACK is blown out.The surge current limit resistor is disconnected,resulting in an abnormal power supply voltage or inan overload of the surge current limit resistor.A SERVOPACK fault occurred.The AC power supply voltage was lowered, andlarge voltage drop occurred.Replace the SERVOPACK.The AC power supply voltage must be within thespecified range.Replace the SERVOPACK.Replace the SERVOPACK. Check the power supplyvoltage, and reduce the number of times thatthe main circuit is turned ON or OFF.)Replace the SERVOPACK.The AC power supply voltage must be within thespecified range.A temporary power failure occurred.Clear and reset the alarm, and restart the operation.The servomotor main circuit cable is short-circuited.Repair or replace the servomotor main circuitcable.The servomotor is short-circuited.Replace the servomotor.A SERVOPACK fault occurred.Replace the SERVOPACK.A.51 Overspeed(Detected whenthe feedbackspeed is the maximummotorspeed × 1.2 ormore for theSGMGH servomotor,and × 1.1or more for theother servomotors.)Occurred when thecontrol power supplywas turned ON.Occurred whenservo was ON.Occurred when theservomotor startedrunning or in ahigh-speed rotation.A SERVOPACK board fault occurred.The order of phases U, V, and W in the servomotorwiring is incorrect.The encoder wiring is incorrect.Malfunction occurred due to noise interference inthe encoder wiring.A SERVOPACK fault occurred.The order of phases U, V, and W in the servomotorwiring is incorrect.The encoder wiring is incorrect.Malfunction occurred due to noise interference inthe encoder wiring.Replace the SERVOPACK.Correct the servomotor wiring.Correct the encoder wiring.Take measures against noise for the encoder wiring.Replace the SERVOPACK.Correct the servomotor wiring.Correct the encoder wiring.Take measures against noise for the encoder wiring.The position or speed reference input is too large.Reduce the reference value.The setting of the reference input gain is incorrect.Correct the reference input gain setting.A SERVOPACK board fault occurred.Replace the SERVOPACK.A.71A.72A.71: High LoadA.72: Low LoadOccurred when thecontrol power supplywas turned ON.A SERVOPACK board fault occurred.Replace the SERVOPACK.Occurred when theservo was ON.The servomotor wiring is incorrect or the connectionis faulty.Correct the servomotor wiring.The encoder wiring is incorrect or the connection isfaulty.Correct the encoder wiring.A SERVOPACK fault occurred.Replace the SERVOPACK.Occurred when theservomotor did notrun by the referenceinput.The servomotor wiring is incorrect or the connectionis faulty.The encoder wiring is incorrect or the connection isfaulty.Correct the servomotor wiring.Correct the encoder wiring.The starting torque exceeds the maximum torque.Reconsider the load and operation conditions, orreconsider the servomotor capacity.A SERVOPACK fault occurred.Replace the SERVOPACK.Occurred duringnormal operation.The actual torque exceeds the rated torque or thestarting torque largely exceeds the rated torque.Reconsider the load and operation conditions, orreconsider the servomotor capacity.Temperature in the SERVOPACK panel is high.Reduce the in-panel temperature to 55° or less.A SERVOPACK fault occurred.Replace the SERVOPACK.10-10