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E-3
TROUBLESHOOTING
E-3
MAGNUM® 450WC & 650WC
Observe all Safety Guidelines detailed througout 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
FUNCTION PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE CAUSE
RECOMMENDED
COURSE OF ACTION
3. Poor arc striking with sticking or
“blast-offs”, weld porosity, narrow
and ropy looking bead, or elec-
trode stubbing into plate while
welding.
4. Tip seizes in diffuser.
A. Improper procedures or tech-
niques.
B. Improper gas shielding.
A. Tip overheating due to prolonged
or excessive high current and/or
duty cycle welding.
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.