Lincoln Electric IDEALARC DC-1000 Service Manual page 43

F-9
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Machine shuts off (input contactor
drops out) when the welder output
terminals are electrically energized.
(#2 to #4 closure at terminal strip.)
The DC-1000 will NOT shut off
when the Stop button is pushed.
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 1-888-935-3877.
TROUBLESHOOTING AND REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
FUNCTION PROBLEMS
1. Remove all welding cables and
control cables from the DC-1000.
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 DC-1000. Either
the remote leads #73, #74, #75,
#76 or #77 are grounded to the
negative 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 DC-1000.
1. Contact your
Authorized Field Service Facility.
CAUTION
IDEALARC
COURSE OF ACTION
1. Check for grounds and or shorts
in the #73, #74, #75, #76, #77
circuit. 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.
local Lincoln 1. The input contactor (1CR) con-
tacts may be stuck closed.
Check and replace if necessary.
2. The Interlock contacts (part of
1CR) may be faulty. Replace if
necessary.
3. The Start/Stop button may be
faulty. Check or replace.
® DC-1000
F-9
RECOMMENDED