00 Index and foreword SEN00056-01 4. Handling controller 1) The controller contains a microcomputer and electronic control circuits. These con- trol all of the electronic circuits on the machine, so be extremely careful when handling the controller. 2) Do not place objects on top of the control- ler. 3) Cover the control connectors with tape or a vinyl bag. Never touch the connector contacts with your hand. 4) During rainy weather, do not leave the controller in a place where it is exposed to rain. 5) Do not place the controller on oil, water, or soil, or in any hot place, even for a short time. (Place it on a suitable dry stand).
6) Precautions when carrying out arc welding When carrying out arc welding on the body, disconnect all wiring harness con- nectors connected to the controller. Fit an arc welding ground close to the welding point. 5. Points to remember when troubleshooting electric circuits 1) Always turn the power OFF before discon- necting or connecting connectors. 2) Before carrying out troubleshooting, check that all the related connectors are properly inserted. a Disconnect and connect the related connectors several times to check. 3) Always connect any disconnected con- nectors before going on to the next step.
a If the power is turned ON with the connectors still disconnected, unnec- essary abnormality displays will be generated. 4) When carrying out troubleshooting of cir- cuits (measuring the voltage, resistance, continuity, or current), move the related wiring and connectors several times and check that there is no change in the read- ing of the tester. a If there is any change, there is proba- bly defective contact in that circuit. D65EX, PX, WX-15E0 15