Lincoln Electric IM924 POWER WAVE 455M_STT - Manual (Page 38)

E-7 TROUBLESHOOTING E-7
POWER WAVE 455M/STT (CE)
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
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
General degradation of the weld
performance
Excessively long and erratic arc.
In the STT mode, the arc is exces-
sively long and erratic.
In the STT mode, the spatter is
higher than normal and the arc is
inconsistent.
1.Check for feeding problems, bad
connections, excessive loops in
cabling, etc.
2. Verify weld mode is correct for
processes.
3. The power source may require cal-
ibration.
4. Check the actual current displayed
on the Power Feed 10 vs. actual
current measured via external
meter.
5. Check the actual voltage dis-
played on the Power Feed 10 vs.
actual voltage measured via exter-
nal meter.
6. Check the actual WFS displayed
on the Power Feed 10 vs. actual
WFS measured via external
meter.
1. Check for proper configuration and
implementation of voltage sensing
circuits.
1. Check that the (21) work sense
lead is connected, and configured
properly.
1. Check that the (21) work sense
lead is connected, and configured
properly. (Dip Switch Set)
2. Verify that the electrode lead is
connected to the STT stud and
not the
“ POWER WAVE ” stud.
3 Check that the “ POWER WAVE ”
stud is not electrically connected
to the STT stud.
If all recommended possible areas
of misadjustments have been
checked and the problem persists,
contact your local Lincoln
Authorized Field Service Facility.