Lincoln Electric 11694 Service Manual page 20

®
POWER WAVE S350
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.
The arc is excessively long and erratic.
The welding starting is poor.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
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 selected.
3. Check the welding cables for loose or
faulty connections.
4. Check for adequate gas shielding.
5. Make sure the welding process is
correct for the wire feed and voltage
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
current draw.
1. In the wire feeder, make certain the
correct wire drive and gear ratio have
been selected for the welding process
being used.
2. Make sure the shielding gas is correct
for the welding process being used.
Also make sure the flow rate is correct.
1. Make sure the driver roll tension on the
wire feeder is adjusted correctly. Also
the welding wire should travel freely
through wire feeding path. Check the
welding tip for blockage.
CAUTION
TROUBLESHOOTING AND REPAIR
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Perform the Power Wave Verification And
Calibration Procedures, see SVM251.
1. 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
section.
1. Perform the Power Wave Verification And
Calibration Procedures, see SVM251.
1. N/A.
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