Owner manual

E-7
TROUBLESHOOTING
E-7
POWER WAVE
®
455M/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
CAUSE
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
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
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 “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.