
IDEALARC DC-600
F-12
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Poor arc characteristics in all
processes.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1.
Check for the correct input volt-
ages on the three- phase input
lines at the DC600.
2.
Make sure the proper welding
procedures are being
used.(wire feed speed, arc volt-
age and wire size).
3.
Check the welding cables for
loose or faulty connections.
RECOMMENDED
COURSE OF ACTION
1.
Check the WELDING MODE
SWITCH (SW4) and the asso-
ciated wiring for loose or faulty
connections. See wiring dia-
gram.
2.
Check the CR3 reed switch.
The voltage from lead #215 to
lead #220 should be 8VDC
when the DC600 is in an idle
condition. When the machine
is producing welding current
the reed switch (CR3) should
close and the voltage from
#215 to #220 should drop to
zero.
3.
Perform the Firing Board test.
4.
Perform the SCR Output
Bridge test.
5.
The control board may be
faulty - Replace.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln
Electric Service Department for technical troubleshooting assistance before you proceed call 216-383-2531 or 1-800-833-9353.
WELDING PROBLEMS
CAUTION