Lincoln Electric IM716 POWER WAVE 455STT - Manual (Page 38)

E-7 TROUBLESHOOTING E-7
POWER WAVE 455/STT
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 per-
formance
Excessively long and erratic arc
In the STT mode, the arc is exces-
sively long and erratic.
In the STT mode, the spatter is high-
er than normal and the arc is incon-
sistent.
.
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
calibration.
4. Check the actual current dis-
played on the Power Feed 10 vs.
actual current measured via exter-
nal 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 "POWERWAVE" stud.
3. Check that the "POWERWAVE"
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.