Lincoln Electric IM10180 POWER FEED 25M NNS - Manual (Page 54)

E-4
TROUBLE SHOOTING
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 your
Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.
PROBLEMS
(SYMPTOMS)
POWER FEED™ 25M NNS
CAUTION
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Variable or "hunting" arc.
Poor arc starts with sticking or
"blast-offs", weld porosity, narrow
and ropy looking bead.
The wire feed speed/amperage and
voltage/trim display work during pre-
set but show nothing during welding.
1. Wrong size, worn and/or melted
contact tip.
2. Worn work cable or poor work
connection.
3. Wrong polarity.
4. The gas nozzle is extended
beyond the contact tip or the wire
stickout is too long.
5. Poor gas shielding on processes
requiring gas.
1. Improper procedures or tech-
niques.
1. The software in the POWER
FEED™ 25M NNS must be
upgraded.
1. Replace the contact tip.
2. Verify all work and electrode con-
nections are tight and that the
cables are in good condition.
Clean/replace as necessary.
3. Adjust polarity to the recommend-
ed procedure.
4. Adjust the gas nozzle and shorten
the stickout to 3/8 to 1/2 inches.
5. Check gas flow and mixture.
Remove or block sources of
drafts.
1. See "Gas Metal Arc Welding
Guide". (GS-100).
1. Contact the local authorized
Lincoln Field Service Shop.
Output Problems