Lincoln Electric IM794 SP-170T - Manual (Page 31)

E-4
SP-170T
E-4 TROUBLESHOOTING
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your
LOCAL AUTHORIZED LINCOLN ELECTRIC FIELD SERVICE FACILITY for assistance before you proceed.
CAUTION
PROBLEMS
(SYMPTOMS)
Arc is unstable – Poor starting
POSSIBLE
CAUSE
1. Check for correct input voltage
to machine. See Installation sec-
tion,
“ Electrical Input
Connections ” .
2. Check for proper electrode
polarity for process.
3. Check gun tip for wear or dam-
age and proper size – Replace.
4. Check for proper gas and flow
rate for process. (For MIG only.)
5. Check work cable for loose or
faulty connections.
6. Check gun for damage or
breaks.
7. Check for proper drive roll orien-
tation and alignment.
8. Check liner for proper size.
RECOMMENDED
COURSE OF ACTION
Contact your local Lincoln
Authorized Field Service Facility.
WELDING PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.