LG Electronics 120S user manual Maintenance, Troubleshooting

Chapter 10. Maintenance

10.1Maintenance and Inspection ················ 10 - 1

10.2Daily Inspection ···················· 10 - 1

10.3Periodic Inspection ··················· 10 - 2

Chapter 11. Troubleshooting

11.1Basic Procedure of Troubleshooting ············· 11 - 1

11.2Troubleshooting ············································································ 11 - 1

11.2.1Troubleshooting flowchart used when the power LED turns off ·····························11 - 2

11.2.2Troubleshooting flowchart used when the error LED is flickering ····························11 - 3

11.2.3Troubleshooting flowchart used when the RUN LED turns off ································11 - 4

11.2.4Troubleshooting flowchart used when the I/O devices doesn’t operate normally ········11 - 5

11.2.5Troubleshooting flowchart used when a program can’t be written to the CPU ············11 - 7

11.3Troubleshooting Questionnaire ························································· 11 - 8

11.4Troubleshooting Examples······························································· 11 - 9

11.4.1Input circuit troubles and corrective actions ·······················································11 - 9

11.4.2Output circuit troubles and corrective actions··················································· 11 - 10

11.5Error code list ·············································································· 11 - 12

Appendix ··················································································································

Appendix 1 System Definitions·······························································App1-1

Appendix 2 Flag Lists···········································································App2-1

Appendix 3 Dimensions········································································App3-1