How do I enable the 14-pin remote control receptacle for stick (SMAW) welding?
By default, the 14-pin remote control receptacle is factory-set to be active in TIG mode only. To enable it for stick welding, remove the power source cover and move DIP switch #2 to the up position (stick remote enabled). Turn off the power source and verify capacitor voltage per Section 7-6 before opening the unit. (Page 16)
From the official Miller PipeWorx 400 Welding Machine manual, page 16
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