YASKAWA SERVOPACK Sigma 7W Series Product Manual

Contents

6.1 Alarm Displays6.1.2 Troubleshooting Alarms Related to the HWBB Function6-36 Maintenance6.1.2 Troubleshooting Alarms Related to the HWBB FunctionThe following table describes troubleshooting alarms that are related to the HWBB function.Contact your Yaskawa representative if you cannot solve a problem with the corrections givenin the table.Alarm Number:Alarm Name Possible Cause Confirmation Correction ReferenceA.Eb1:Safety FunctionSignal Input Tim-ing ErrorThe delay betweenactivation of the/HWBB1 and/HWBB2 input sig-nals for the HWBBfunction was ten sec-ond or longer.Measure the time delaybetween the /HWBB1and /HWBB2 signals.The output signal circuitsor devices for /HWBB1and /HWBB2 or the SER-VOPACK input signal cir-cuits may be faulty.Alternatively, the input sig-nal cables may be discon-nected. Check to see ifany of these items arefaulty or have been dis-connected.page 5-1A failure occurred inthe SERVOPACK. – Replace the SERVO-PACK. –A.EC8:Gate Drive Error 1(An erroroccurred in thegate drive circuit.) A failure occurred inthe SERVOPACK. –Turn the power supply tothe SERVOPACK OFF andON again. If an alarm stilloccurs, the SERVOPACKmay be faulty. Replace theSERVOPACK.–A.EC9:Gate Drive Error 2(An erroroccurred in thegate drive circuit.)