Welding Problems - Lincoln Electric POWER WAVE S500 Service Manual

F-7
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
General degradation of the welding
performance
The wire burns back to the tip at the
end of the weld.
During a weld the machine shuts
down.
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)

WELDING PROBLEMS

1. Check for proper wire feeding.
Make certain that the actual
speed is the same as the preset.
2. Verify that the correct wire drive
and gear ratio have been select-
ed.
3. Check the welding cables for
loose or faulty connections.
4. Check for adequate gas shield-
ing.
5. Make sure the welding process is
correct for the wire feed and volt-
age settings.
1. Reduce the burnback time.
2. Reduce the workpoint.
1. The secondary current limit has
been exceeded and the machine
shuts down to protect itself.
Adjust the procedure to reduce
the load and lower the output cur-
rent draw.
CAUTION
POWER WAVE
RECOMMENDED
COURSE OF ACTION
1. Perform
Voltage Calibration Procedure.
N/A.
1. A non-recoverable internal fault
will interrupt the welding output.
This condition will also result in
a status light blinking. Check for
error codes. See Status LED
Troubleshooting in this sec-
tion.
® S500
F-7
the Current and