... -by state, digital indicate dXX means spot welding mode, no status block between electrodes, press (START) button to carry on welding ... ) Stand-by state, digital show h_X means heat treatment, put status block between electrodes, press (START) button to carry on heat ... -by state, digital show q_X means braze welding mode, no status block between electrodes, press (START) button to carry on braze ...