Table of Contents1. About safety ......................................11.1 Safety precautions ....................................11.2 Safety instructions that must be observe 12. Rated Specifications ........................ 42.1 Rated specifications for 350GL4 ............42.1.1 Duty cycle ...................................................52.1.2 Dimensions...................................................52.2 Rated specifications for 500GL4... ............62.2.1 Duty cycle ...................................................62.2.2 Dimensions...................................................63. Installation .........................................73.1 Transportation ..........................................73.2 Installation site ..........................................73.3 Power supply equipment .........................74. Configuration ....................................84.1 what’s needed ..........................................84.2 Connecting cable ....................................94.2.1 About connecting cable ............................94.2.2 Cautions about using connecting cable.....95. Names and functions .....................105.1 Switches and rear side ...........................105.2 Front panel .............................................126. Connection ......................................166.1 Output side connection .........................166.1.1 Connecting cable from base metal ...........166.1.2 Connecting torch cable ............................176.1.3 Connecting feeder cable ..........................176.1.4 Connecting grounding wire .......................186.1.5 Connecting input powe r cable ..................186.2 Connecting jig(s) ....................................196.2.1 Layout of jig terminals ..............................196.2.2 Functions of jig terminals ..........................197. Preparation and terminationprocessings........................................207.1 Preparation ..............................................207.1.1 Use of protective equipment .....................207.1.2 Pre-operation check .................................207.1.3 Turning on power .....................................207.2 Termination processing (steps afterwelding operation) ...................................207.2.1 Shutting off gas ........................................207.2.2 Shutting off power ....................................208. Settings ...........................................218.1 FUNCTION settings ..............................218.1.1 “F. ADJ” .................................................218.1.2 “CALL” and “RECORD” .........................258.2 CHANGE settings ...............................268.4 Welding wire inching .............................278.5 Checking shield gas ..............................279. Operation ........................................289.1 Welding current calibration .................289.2 “NO CRATER”.........................................289.3 “CRATER” .............................................299.4 “INI. &CRATER”......................................309.5 “Crater repeat” operation ....................319.6 “ARC SPOT” ..........................................3210. Maintenance and inspection..........3310.1 Daily check ..........................................3310.1.1 Welding machine (This product) ..........3310.1.2 Cables .................................................3310.1.3 Other devices ......................................3410.2 Periodic check ....................................3510.2.1 Check guideline ................................... 3510.3 Precautions for withstand voltage test andinsulation resistance measurement ......3610.3.1 Test preparation .................................. 3610.3.2 After completion of the test ....................3611. Troubleshooting ............................3711.1 Error indication ...................................3711.2 Troubleshooting table ..........................3912. Parts list .........................................3912.1 Parts list for 350GL4.............................4012.2 Parts list for 500GL4.............................4013. Circuit diagram ..............................4813.1 Circuit diagram for 350GL4 ................4813.2 Circuit diagram for 500GL4.................4914. Appendix ........................................5014.1 CO2 welding conditions table: Solid wire(Reference) .............................................5014.2 MAG welding conditions table: Solid wire(Reference) .............................................5214.3 Arc spot welding conditions table(Reference) .............................................5214.4 Welding conditions memorandum.....5414.4 Welding conditions memorandum.....53reset .............................................26