Lincoln Electric Invertec STT II Operator's Manual page 27

E-5
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Excessive weld spatter. Arc sounds
and looks like a standard MIG
process.
The wire burns back to the tip.
Poor welding, weld settings drift or
output power is low.
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.
TROUBLESHOOTING
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Check the Arc Sense leads for
loose or faulty connections.
2. Make sure the Arc Sense
"WORK" lead is as close as pos-
sible to the welding arc.
3. Make sure the machine and wire
feed settings are correct for the
process and wire being used.
1.Remove P1 from the control
board if the machine noodle
welds, the current sense board is
bad.
1. Make sure machine settings are
correct for welding process being
used.
2. Check welding cables for loose
or faulty connections.
CAUTION
INVERTEC STT II
RECOMMENDED
COURSE OF ACTION
If all recommended possible areas
of misadjustment have
checked and the problem persists,
Contact your local Lincoln
Authorized Field
Facility.
E-5
been
Service