Lincoln Electric SQUARE WAVE TIG 355 Service Manual page 71

F-19
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Stick electrode "blasts off" when
touched to workpiece.
machine operates properly in the
TIG mode.
The arc seems too hot, and reduc-
ing the Peak Current control does
not help. The machine operates
properly in the TIG mode.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed.
Call 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
STICK WELDING PROBLEMS
1. The weld current is set too high
The for electrode size.
2. If the Start switch is ON, the start
current may be set too high for
electrode size.
3. The Arc Force control may be set
too high.
1. The Arc Force control may be set
too high.
2. If the Start switch is ON, the start
current may be set too high or the
start time may be set too long.
CAUTION
SQUARE WAVE TIG 355
RECOMMENDED
COURSE OF ACTION
1. The control board may be faulty.
Replace.
1. The control board may be faulty.
Replace.
F-19