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Observe Safety Guidelines TROUBLESHOOTING GUIDE
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely,
contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
The arc starting is not satisfactory. 1. The Hot Start Control may not
be set correctly for the process
being used.
2. Make sure the Output Control is
adjusted correctly for the
process being used.
1. Check the Hot Start Control
(R2) and associated leads and
connections. Note: The Arc
Force Control and Hot Start
Control are interchangeable and
may be switched to aid in trou-
bleshooting. See the Wiring
Diagram.
2. The Weld Control Board may be
faulty.
When stick welding the electrode
“stubs”.
1. The Arc Force Control may not
be set correctly for the process
being used. Increase the Arc
Force.
2. Make sure the Output Control is
adjusted correctly for the
process being used.
3. Check the welding cables for
loose or faulty connections.
1. Check the Arc Force Control
(R3) and associated leads and
connections. Note: The Arc
Force Control and Hot Start
Control are interchangeable and
may be switched to aid in trou-
bleshooting. See the Wiring
Diagram.
2. The Weld Control Board may be
faulty.
F-12 F-12
TROUBLESHOOTING & REPAIR
MULTI-WELD 350
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