Thermal Arc Fabricator fault

  1. triple New Member

    cumbria GB
    HI went to use my faithfull old Thermal Arc Fabricator 200 welder today and she turned on ok and sat there on strike after that not good , with plenty of work to do.
    Removed the covers to see whats up and had a look around with my meter and found the following;

    No voltage at contactor relay coil 24 volt side , when the switch is pushed by hand it trips the house rcd. The power selector switch is a bit stiff could be wrong but disconnected the live feed from it and it stopped in the main tripping rcd. Any advice on its antics would be warmly welcomed