Lincoln Electric POWER MIG 255XT Operator's Manual page 49

TROUBLESHOOTING
Machine output is low. Welds are "cold", weld
bead is rounded or bumped up demonstrating
poor wetting into plate.
1. Check input voltage. Make sure input voltage
matches name-plate rating and reconnect panel
configuration.
2. Make sure settings for wire feed speed and volt-
age are correct for process being used.
3. Make sure output polarity is correct for process
being used.
4. Check welding cables and gun assembly for
loose or faulty connections.
Poor arc striking with electrode sticking or blast-
ing off.
1. Make sure settings for wire feed speed and
voltage are correct for process being used.
2. The Run-In (Fast or Slow) speed may be
wrong for process and technique being
used. See Operation Section.
3. The gas shielding may be improper for
process being used
CAUTION
If for any reason you do not understand the test pro-
cedures or are unable to perform the tests/repairs
safely, contact your LOCAL AUTHORIZED LIN-
COLN ELECTRIC FIELD SERVICE FACILITY for
assistance before you proceed.