User ManualTable of ContentsMaster TOC6Safety2Section A Installation7Section B Operation13Section C Accessories27Section D Maintenance29Section E Theory of Operation33Section F Troubleshooting & Repair41Symptoms44Major Physical or Electrical Damage is Evident.44Machine is Dead - No Output - No Fan No Displays.44Fan runs - Display and control panel dark. No output from machine in either Stick or TIG modes.44The voltmeter reads “00” in Stick Mode, and there is no output from the machine when in the TIG 2-Step Mode.45Machine does not respond (no gas flow, no high frequency and no open circuit voltage) when arc switch or amptrol is activated...45115VAC Receptacle not working properly (voltage is below 108VAC). Machine has welding output - fan is running.46Machine regularly overheats - ther-mostat opens, PL1 (yellow light on front panel) glows. The fan runs but machine has no output46Machine makes a very loud buzzing noise in DC Stick Mode, or in DC TIG Mode when the arc start or amptrol is pressed.46There is no current draw from machine’s output studs. (The machine is not externally loaded).46The ammeter displays a very high value (greater than 316 amps) when the machine is not loaded. Machine may have low or no out47The yellow light (PL1) on the front panel is not lit.48One or more keypad lights (LEDS) are dark and cannot be lit when their respective keys are pressed -machine is operable.48The Beeper (Piezoelectric Buzzer) cannot be heard - machine operat-ing normally.48The control panel displays cannot be read. The characters run, display only half characters, or random dots may appear on display49The voltmeter always reads “00” . The machine output is normal.49The control panel display background is dark instead of red. The machine operates normally.49AC/DC Indicator on control panel display show AC when polarity switch is in the DC position, or vice versa - machine has output50All red keypad LEDS are dark but the control panel display is operable. The machine has output.50Machine output is intermittently lost. Gas flow and high frequency are also interrupted.51Arc “Flutters” when TIG welding.51Lack of penetration in AC TIG welding.52Black areas along weld bead.52Black areas along weld bead at or near end of weld.52Machine has low output when in TIG 4-Step Mode.53Weak high frequency - machine has normal welding output.53The display shows zero amps, but indicates open circuit voltage (approximately 53V). The arc start switch or amptrol is not...53High frequency “Spark” is present at tungsten electrode, but operator is unable to establish a welding arc. Machine has normal...54No high frequency. Machine is in the TIG Mode and has normal output.54No gas or water flow when arc start switch or amptrol is activated in the TIG Mode. Machine has output - fan runs. When toggl...55Arc rectification when AC TIG weld-ing.55There is no gas or water flow when the arc start switch or amptrol is activated in the TIG mode. The machine has output and the..55Stick electrode “Blasts Off” when arc is struck.56Cannot adjust AC Wave Balance when welding in the Stick Mode.56Machine welds at a very low output regardless of the preset current setting - arc is stable.56Variable or sluggish welding arc when welding in the Stick Mode.56Section G Electrical Diagrams87Size: 1.65 MBPages: 100Language: EnglishOpen manual