IDEALARC DC-600
F-6
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Machine input contactor operates
but machine has no weld
output.Fan runs and pilot light
glows.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1.
Install a jumper from #2 to #4
on machine terminal strip. If
machine weld output is restored
the problem is in the wire feed-
er or control cable.
2.
If remote control is not being
used make certain the OUT-
PUT
CONTROL
SWITCH
(SW3) is in the "OUTPUT CON-
TROL AT DC 600" position.
3.
Check 8AMP fuse in the front
panel.Replace if blown.
4.
Check for loose or faulty weld
cable connections.
RECOMMENDED
COURSE OF ACTION
1.
Check operation of output pilot
relay(CR4). There should be
115VAC present at leads #31
and #4 at (CR4) when #2 and
#4 are jumpered together at
the terminal strip.
a.
If the correct voltage is
present and the relay
does not activate, the
relay may be faulty.-
Replace.
b.
If the 115VAC is missing,
check the associated
wiring for loose or faulty
connections. See wiring
diagram.
2.
Check the OUTPUT CON-
TROL
POTENTIOMETER
(R1) and associated circuitry
for loose or faulty connections.
See wiring diagram.
3.
4.
5.
6.
Perform SCR Output Bridge
test.
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.
OUTPUT PROBLEMS
CAUTION