Output Problems
Machine is Dead - No Output - No Fan	Make certain that the input power switch is in the “ON” position and machine is plugged in. Check the input voltage at the machine. Input voltage must match the rating plate and voltage connection. Refer to Reconnect Procedure in the Installation section of this manual. Blown or missing fuses in input line.
Fan runs - No output from machine in either Stick or TIG modes.	Check for proper input voltages per nameplate and voltage reconnection. Check to make sure polarity switch is not in between two positions.
Fan runs - No output from machine in either Stick or TIG modes and the yellow light on the control panel is on.	Welding application may have exceed the recommended duty cycle. Allow the unit to run until the fan cools the unit and the yellow light goes out.
Machine does not respond (no gas flow, no high frequency and no open circuit voltage) when arc start switch or Amptrol is activated - fan is working.	Machine MUST be in the TIG Mode. The Amptrol may be defective. Check for continuity between pins “D” and “E” on cable connector when Amptrol is depressed.
Machine regularly over heats - thermostat opens, Yellow light on front panel glows. The fan runs but machine has no output.	Welding application may exceed recommended duty cycle. Reduce the duty cycle.  Dirt and dust may have clogged the cooling channels inside the machine. Blow out unit with clean, dry low pressure air. Air intake and exhaust louvers may be blocked due to inadequate clearance around machine.
TIG Mode Problems
Machine output is intermittently lost. Gas flow and high frequency are also interrupted.	Problem may be caused by high frequency interference. Make sure that the machine is grounded properly according to the installation instructions. If there are other high frequency sources in the area, make certain that they are grounded properly. 2. Check Amptrol for proper operation and loose connections. 3. Check for proper input voltage and proper voltage reconnection.
Arc “Flutters” when TIG welding.	Tungsten electrode may be too large in diameter for the current setting.  Tungsten not “sharp” when welding in DC - mode. Gas shielding may be insufficient. Increase gas flow; reduce tungsten stickout beyond gas cup. Check for contaminated gas or leaks in the gas line, torch, or connections  If a helium blend is used as a shielding gas, then reduce the percentage of helium.
Arc “Pulsates” when AC TIG welding.	Micro Switch mounted on Polarity Switch is not opening in “AC” mode.
Black areas along weld bead.	Clean any oily or organic contamination from the work piece. Tungsten electrode may be contaminated. Replace or sharpen. Check for contaminated gas or leaks in the gas line, torch, or connections Gas shielding may be insufficient. Increase gas flow; reduce tungsten stickout beyond gas cup.
Weak high frequency - machine has normal welding output.	Check for poor connections in the welding circuit. Gas shielding may be insufficient. Increase gas flow; reduce tungsten stickout beyond gas cup. Check for work and electrode cables in poor condition allowing high frequency to “Leak Off”. Keep cables as short as possible. Check Spark Gap operation and setting (0.020”)
High frequency “spark” is present at tungsten electrode, but operator is unable to establish a welding arc. Machine has normal open circuit voltage (refer to Technical Specifications in the Installation Chapter).	The tungsten electrode may be contaminated. Replace or sharpen.  The current control may be set too low.  The tungsten electrode may be too large for the process. If a helium blend is used as a shielding gas, then reduce the percentage of helium.
TIG Welding Problems
No high frequency. Machine is in the TIG Mode and has normal output.	If the machine location is in a highly dirty environment with conductive contaminants, check and clean the spark gap with a low pressure air stream per the maintenance instructions.
No gas flow when Amptrol is activated in the TIG Mode. Machine has output - fan runs. A “Click” can be heard indicating that the gas solenoid valve is operating.	Gas supply is empty or not turned on. Flow regulator may be set too low. Gas hose may be pinched. Gas flow may be blocked with dirt. Check filter screen inside gas inlet fitting to solenoid valve. Use filters to prevent reoccurrence.  Consult your local welder/gas distributor.
When AC TIG welding, the arc is erratic and there is a loss of “cleaning” of the work piece.	Tungsten electrode may be too small for process. Use a larger diameter tungsten or a pure tungsten. If a helium blend is used as a shielding gas, then reduce the percentage of helium.
The end of the tungsten electrode melts away.	The welding current is too high for the electrode type and/or size. See Electrode Amperage Ranges in the Operation Section of this manual.
Stick Welding Problems
Stick electrode “Blasts Off” when arc is struck.	Weld current may be set too high for electrode size. Reduce current control setting, or use a larger diameter electrode.
Stick electrode “sticks” in the weld puddle.	The weld current may be set too low. Increase the current control setting or use a smaller diameter electrode.