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E-4
TROUBLESHOOTING
E-4
POWER FEED 10 / R
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
Tip seizes in diffuser.
Motor does not turn when trigger is
pulled.
The drive motor does not turn
although arc voltage is present and
the gas solenoid is on.
No control of wire feed speed
motor. Gas solenoid operates
properly and arc voltage is present.
Wire feed speed can be set through
ArcLink but WFS is erratic.
Wire feed motor turns and gas sole-
noid operates, but no arc voltage is
present.
Speed does not change when weld
current flows.
Erratic arc length, especially with a
pulse or STT program. Welding
may or may not vary from normal
procedure. Wire feeds properly.
Wire feed speed is consistent and
adjustable, but operates at the
wrong speed.
1. Tip overheating due to pro-
longed or excessive high current
and/or duty cycle welding.
Note: A light application of high
temperature antiseize lubri-
cant (such as Lincoln E2067
Graphite Grease) may be
applied to tip of threads.
1. The wire drive motor may be
overloaded.
2. Fault occurred
1. Fault occurred
1. Damaged leads to the motor
tachometer.
2. Damaged tachometer.
1. Power source is unable to pro-
vide arc voltage because of ther-
mal shutdown or other failure.
1. Run-in and weld speeds are set
to the same value.
2. Fault occurred
1. The work sense lead (#21) or the
electrode sense lead (#67) may
have intermittent or poor connec-
tions.
2. Improper power source selection
on the control P.C. board.
3. Welding Program Error.
1. DIP switch is incorrectly set for
the wrong wire drive or gear
ratio.
2. Fault occurred
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.