Lincoln Electric LN-10 - Manual (Page 35)

TROUBLESHOOTING
LN-10
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
Speed does not change when weld
current flows.
Voltmeter does not function proper-
ly. Welding may or may not vary
from normal procedure. Wire feeds
properly.
Cold feed forward or cold feed
reverse buttons on keypad do not
work, but motor control otherwise
functions properly.
Gas purge key does not operate
the gas solenoid, but gas flow does
occur while welding.
1. Run-in and weld speeds are set
to the same value.
2. Current sensing reed switch is not
operating properly.
3. The wiring from the control p.c.
board to the weld current sensing
reed switch is damaged.
4. Damaged control p.c. board.
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. Control p.c. board failure.
1. The connector from the control
p.c. board to the display p.c.
board or the connector from the
display p.c. board to the keypad
are loose or improperly inserted.
2. Damaged keypad
3. Damaged display p.c. board.
4. Damaged control p.c. board.
1. The connector from the control
p.c. board to the display p.c.
board or the connector from the
display p.c. board to the keypad
are loose or improperly inserted.
2. Damaged keypad
3. Damaged display p.c. board.
3. Damaged control p.c. board.
E-4 E-4
If all recommended possible areas
of misadjustment have been
checked and the problem persists,
Contact your local Lincoln
Authorized Field Service Facility.