Lincoln Electric IM812-A - Manual (Page 23)

E-3 TROUBLESHOOTING E-3
LN-35
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 AREAS OF
MISADJUSTMENTS(S)
RECOMMENDED
COURSE OF ACTION
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.
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.
If all recommended possible areas of
misadjustment have been checked
and the problem persists,
Contact
your local Lincoln Authorized
Field Service Facility.