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E-7
PROBLEMS
(SYMPTOMS)
Wire burns back to tip at the end of
the weld.
Machine output shuts down during a
weld.
Machine wonʼt produce full output.
Excessively long and erratic arc.
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.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
Weld and Arc Quality Problems (Continued)
1. Burnback Time
1. Secondary current limit has been
exceeded, and the machine shuts
down to protect itself.
2. System Fault
1. Input voltage may be too low, lim-
iting output capability of the power
source.
2. Machine calibration.
1. Wire feed problem.
2. Loss of, or improper Shielding
Gas
3. Machine calibration.
POWER WAVE
CAUSE
1. Reduce burnback time and/or
1. Adjust procedure or reduce load
2. A non-recoverable fault will inter-
1. Make certain that the input voltage
2. Calibrate secondary current and
1. Check for feeding problems. Make
2. Verify gas flow and type are cor-
3. Calibrate secondary current and
CAUTION
C300
®
RECOMMENDED
COURSE OF ACTION
work point.
to lower current draw from the
machine.
rupt welding. This condition will
also result in a status light blink-
ing. See the Status Light section
for more information.
is proper, according to the Rating
Plate located on the rear of the
machine.
voltage.
sure proper gear ratio has been
selected.
rect
voltage.
E-7
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