Lincoln Electric Square Wave TIG200 Manual Del Operador página 22

SQUARE WAVE® TIG 200
PROBLEM
No high frequency.
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.
When AC TIG welding, the arc
is erratic and there is a loss
of "cleaning" of the work
piece.
The end of the tungsten
electrode melts away.
Stick electrode "Blasts Off"
when arc is struck.
Stick electrode "sticks" in the
weld puddle.
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.
All manuals and user guides at all-guides.com
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE CAUSE
1. Ensure gas flow is present and cables are connected.
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.
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.
1. The welding current is too high for the electrode type and/or size.
2. Check Polarity
1. Weld current may be set too high for electrode size. Reduce current
control setting, or use a larger diameter electrode.
1. The weld current may be set too low. Increase the current control
setting or use a smaller diameter electrode.
CAUTION
E-4
TROUBLE SHOOTING
RECOMMENDED
COURSE OF ACTION
Contact your Local Lincoln
Authorized Field Service
Facility for technical
troubleshooting assistance.