IDEALARC DC-600
F-9
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
TROUBLESHOOTING GUIDE
PROBLEMS
(SYMPTOMS)
Machine shuts off (input contactor
drops out) when the welder output
terminals are made electrically
"hot".
(#2 to #4 closure at terminal strip.)
The DC600 will NOT shut off when
the Stop button is pushed.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
1.
Remove all welding cables and
control cables from the DC 600.
Jumper #2 to #4 at the terminal
strip. If the machine does NOT
shut off and normal open circuit
voltage is present at the welder
output terminals the problem is
external to the DC600. Either
the remote leads #75, #76 or
#77 are grounded to the nega-
tive output cable or there is a
short on the welding output ter-
minals.
2.
If the machine still shuts off
when all control and welding
cables are removed then the
problem is internal to the
DC600.
1. Contact your local Lincoln
Authorized Field Service
Facility.
RECOMMENDED
COURSE OF ACTION
1.
Check for grounds and or
shorts in the #75, #76, #77 cir-
cuit. See wiring diagram.
2.
Check for grounds and shorts
in the welder output terminals
and associated leads. See
wiring diagram.
3.
Check the output shunt and
associated leads. See wiring
diagram.
4.
Perform the Control Board
test.
1. The input contactor(CR1)
contacts may be stuck
closed. Check and replace
if necessary.
2. The Interlock contacts (Part
of CR1) may be faulty.
Replace if necessary.
3. The ON/OFF PUSHBUT-
TON may be faulty. Check
or 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.
OUTPUT PROBLEMS
CAUTION
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