The output terminals are always electrically “hot, Troubleshooting & repair, Caution – Lincoln Electric IDEALARC SVM136-A User Manual
Page 48
TROUBLESHOOTING & REPAIR
F-8
F-8
IDEALARC CV-400
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, 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
OUTPUT PROBLEMS
The output terminals are always
electrically “hot.”
1. Remove any external leads that
may be connected to the 14 pin
amphenol or the terminal strip.
If the problem disappears, the
fault is in the control cable or
wire feeder.
1. Check for an internal short
between leads #2 and #4. See
the Wiring Diagram.
2. Remove plug J3 (SCR gate
leads) from the control board. If
the problem disappears, the
control board may be faulty.
Replace. If the output terminals
are still electrically “hot,” perform
the
3. The snubber board may be
faulty. Check or replace.