Lincoln Electric IDEALARC DC-1000 Service Manual page 45

F-11
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Poor arc starting when the DC-
1000 is in the CV Sub-Arc or CV
Innershield Modes.
Poor arc characteristics in all
processes.
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)
WELDING PROBLEMS
1. Make sure the proper welding
procedures are being used (wire
feed speed, arc voltage and wire
size).
2. Check weld cables for loose or
faulty connections.
1. Check for the correct input volt-
ages on the three phase input
lines at the DC-1000.
2. Make sure the proper welding
procedures are being used (wire
feed speed, arc voltage and wire
size).
3. Check the welding cables for
loose or faulty connections.
CAUTION
IDEALARC
COURSE OF ACTION
1. Check the 3CR reed switch.
The voltage from lead #215 to
lead #220 should be 8 VDC
when the DC-1000 is in an idle
condition (on but not welding).
When the machine is producing
welding current, the reed switch
(3CR) should close and the volt-
age from #215 to #220 should
drop to zero.
2. Perform the Firing Board Test.
3. Perform Static SCR Test.
4. Perform Active SCR Test.
5. The control board may be faulty
- Replace.
1. Check the Mode Switch (SW4)
and the associated wiring for
loose or faulty connections. See
Wiring Diagram.
2. Check the 3CR reed switch. The
voltage from lead #215 to lead
#220 should be 8 VDC when the
DC-1000 is in an idle condition.
When the machine is producing
welding current, the reed switch
(3CR) should close and the volt-
age from #215 to #220 should
drop to zero.
3. Perform the Firing Board Test.
4. Perform Static SCR Test.
5. Perform Active SCR Test.
6. The control board may be
faulty - Replace.
® DC-1000
F-11
RECOMMENDED