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F-12 F-12
LINCOLN
®
ELECTRIC
IDEALARC DC-400
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE Observe Safety Guidelines
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, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
WELDING PROBLEMS
Poor arc striking when using semi-
automatic or automatic wire
feeders.
1. Make sure the correct weld pro-
cedures are being used.
(Electrode, Gas, Etc.)
2. Check the welding cables for
loose or faulty connections.
1. Check reed switch CR3 for
proper operation. Switch
should be normally open until
weld current is established.
2. The start board may be faulty.
Replace.
3. The control board may be
faulty. Replace.