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F-35
TROUBLESHOOTING & REPAIR
F-35
NA-5
Observe all Safety Guidelines detailed throughout this manual
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 216-383-2531 or 1-800-833-9353.
CAUTION
WELDING PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
Poor arc striking with sticking or
“blast offs”. The weld bead is ropey
and has porosity.
1. Make sure the welding parame-
ters (voltages and wire feed
speed) and techniques are cor-
rect for the welding procedure
being used.
2. Check the welding cables for
loose or faulty connections.
3. The contact tip may be worn.
Check or replace.
4. The welding power source may
be faulty. Check or replace.
1. Put the Lincoln power source in
the machine control mode.
Jumper the “BYPASS” pins on the
NA-5 voltage board. Adjust the
weld voltage at the power source
for the process being used. If the
problem is resolved check or
replace the control cable or the
NA-5 voltage board may be faulty.
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