Lincoln Electric IM359-G Operating Manual page 32

E-4
PROBLEMS
(SYMPTOMS)
Solenoid does not close when
trigger is pulled or purge button
is pressed. Wire feeds properly.
Variable or "hunting" arc.
Weld porosity, narrow and ropey
bead, or electrode stubbing into
plate when welding.
Motor feeds but there is no wire
feed speed control.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely,
contact your local authorized field service facility for technical troubleshooting assistance before you proceed.
LN-25
TROUBLESHOOTING
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Make certain that plugs J2
and J3 are connected to the
control board securely.
WELD PROBLEMS
1. Worn and/or melted contact
tip -Replace.
2. Worn work cable or poor
work connection.
3. Loose electrode connect-
ions. -Check for loose or
faulty connections.
4. Wrong electrode polarity for
process being used.
1. Contaminated weld joint or
improper procedures. -
Clean joint and check
procedure (wire speed and
all voltage).
1. Make sure all molex plugs
and leads are securely
connected to the control
board.
2. Check speed sensor - see
maintenance section.
CAUTION
RECOMMENDED
COURSE OF ACTION
Contact your local
Lincoln Authorized
Field Service Facility