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E-4
TROUBLESHOOTING
E-4
POWER FEED™ 25M
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.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
Wire feed speed consistently oper-
ates at the wrong value.
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. The wire feeder gear setting is not
properly set.
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 must be upgraded.
1. Verify the POWER FEED™-15
software setting matches the gear
mounted. See the Instruction
Manual for setting the gear speed.
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