E-4
TROUBLE SHOOTING
Observe all Safety Guidelines detailed throughout this manual
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
Local Lincoln Authorized Field Service Facility
for technical troubleshooting assistance before you proceed.
CAUTION
SQUARE WAVE
®
TIG 200
PROBLEM
POSSIBLE CAUSE
RECOMMENDED
COURSE OF ACTION
No high frequency.
1. Ensure gas flow is present and cables are connected.
Contact your Local
Lincoln
Authorized Field Service
Facility
for technical
troubleshooting assistance.
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.
1. Gas supply is empty or not turned on.
2. Flow regulator may be set too low.
3. Gas hose may be pinched.
4. Gas flow may be blocked with dirt.
5. 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.
1. Tungsten electrode may be too small for process. Use a larger
diameter tungsten or a pure tungsten.
2. If a helium blend is used as a shielding gas, then reduce the
percentage of helium.
The end of the tungsten
electrode melts away.
1. The welding current is too high for the electrode type and/or size.
2. Check Polarity
Stick electrode “Blasts Off”
when arc is struck.
1. 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.
1. The weld current may be set too low. Increase the current control
setting or use a smaller diameter electrode.
