Lincoln Electric LN-10 HEADS & CONTROLS IM587-B Operator's Manual page 39

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PROBLEMS
(SYMPTOMS)
Poor arc striking with sticking or
"blast-offs", weld porosity, narrow
and ropy looking bead, or electrode
stubbing into the plate while weld-
ing.
Tip seizes in the 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 turns. Gas solenoid operates
properly and arc voltage is present.
Wire feed speed can be set on the
display, but has no control of the
wire feed speed.
Wire feed motor turns and gas sole-
noid operates, but no arc voltage is
present.
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.
TROUBLESHOOTING
Observe all Safety Guidelines detailed throughout this manual
POSSIBLE
1. Improper procedures or techniques.
2. Improper gas shielding.
1. Tip overheating because of prolonged
or excessive high current and/or duty
cycle welding.
1. The wire drive motor may be over-
loaded. "Hxx" will be displayed on the
WFS display, where "xx" is the num-
ber of seconds until the wire drive
attempts to run again.
2. A jumper plug or K1558-1 Remote
Switch Interface Module must be
properly installed into connector J5.
3. Damaged wiring in the trigger circuit.
4. Control p.c. board failure.
1. Damaged leads to the drive motor.
2. Damaged wire drive motor.
3. Damaged control p.c. board.
1. Damaged leads to the motor
tachometer.
2. Damaged tachometer.
3. Damaged control p.c. board
1. Power source is unable to provide arc
voltage because of thermal shutdown
or other failure.
CAUSE
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.
CAUTION
LN-10
RECOMMENDED
COURSE OF ACTION
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