13Warning! Operating the equipment incorrectly can cause serious injury anddamage. Do not use the functions described here until you have read and com-pletely understood all of the following documents:-these Operating Instructions-all "Operating Instructions" for the system components, especia"Safety rules"CastoTIG 2201DC control panelFig.4 CastoTIG 2201 DC control panelOn the CastoTIG 2201 DC power source, the TIG-DC and rod electrode DC weldingprocesses are available. The following processes and functions are not available andcannot be retro-fitted:-TIG-AC welding-rod-electrode AC welding-switchover facility between the rod electrode DC- and rod electrode DC+processesImportant! To change over from the rod electrode DC- welding process to the rodelectrode DC+ welding process on the CastoTIG 2201 DC power source, reconnect theelectrode holder and the earthing (grounding) cable to the opposite welding sockets (i.e.swap them over - see the section headed “Rod electrode (MMA) welding”).(1) Mode button ... for selecting the operating mode:(15) (12)(10) (2) (3) (5)(4)(1)(9)(14)(13) (7) (8)(11)(2) 2-step mode(3) 4-step mode(4) Contact ignition (Lift-arc)(5) Rod electrode (MMA) weldingImportant! If you select the “Rod electrode (MMA) welding” mode (5), the weldingvoltage will only be available after a 3-second time-lag.