The contact tip seizes in the gas diffuser, Troubleshooting and repair, Caution – Lincoln Electric POWER MIG 11521 User Manual
Page 48
WELDING PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
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.
CAUTION
The weld bead is narrow or ropy.
May have porosity with the elec-
trode stubbing into the plate.
1. Make sure the welding proce-
dures and electrode polarity are
correct for the process being
used.
2. Make certain the shielding gas is
correct and the flow is proper.
3. Make sure the weld joint is not
“contaminated”.
1. Perform
the
2. The output capacitors may be faulty.
Check for loose connections at the
capacitors. Also check for leaky
capacitors. Replace if necessary.
WARNING: The liquid electrolyte in
these capacitors is toxic. Avoid
contact with any portion of your
body.
The contact tip seizes in the gas dif-
fuser.
1. The tip is being over heated due
to excessive current and/or high
duty cycle.
2. A light application of high temper-
ature anti-seize lubricant may be
applied to the contact tip threads.
TROUBLESHOOTING AND REPAIR
F-10
F-10
Power MIG® 215XT