ENCOntents1. Introduction ......................................................................................................................... 31.1 General ....................................................................................................................................... 31.2 About HiArc M product series ........................................................................................... 32. Installation............................................................................................................................. 42.1 Before use .................................................................................................................................. 42.2 Machine introduction ........................................................................................................... 42.3 Positioning of the machine ................................................................................................ 52.4 Distribution network ............................................................................................................. 52.5 Connecting cables ................................................................................................................. 52.5.1 Mains connection ............................................................................................................ 62.5.2 Wire feeder connection ................................................................................................... 72.5.3 Earth return cable connection ........................................................................................ 82.5.4 Gas heater ........................................................................................................................ 82.6 Optional accessories ............................................................................................................. 83. Using the machine........................................................................................................... 93.1 Control panel functions ....................................................................................................... 93.2 Starting the machine .......................................................................................................... 103.3 LCD display ............................................................................................................................. 103.4 LED indicators ........................................................................................................................ 103.5 Selecting shielding gas ...................................................................................................... 113.6 Gas test ..................................................................................................................................... 113.7 Trigger logic and Crater Fill function ............................................................................ 113.8 Calibrating wire feed speed.............................................................................................. 134. Troubleshooting .............................................................................................................. 155. Maintenance ...................................................................................................................... 165.1 Regular maintenance .......................................................................................................... 165.2 Disposal of the machine .................................................................................................... 166. Technical data ................................................................................................................... 167. Ordering codes................................................................................................................. 17HiArc M 400R, M 500R2