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F-11
TROUBLESHOOTING & REPAIR
F-11
IDEALARC DC-1000
Observe all Safety Guidelines detailed throughout this manual
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
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
Poor arc starting when the DC-
1000 is in the CV Sub-Arc or CV
Innershield Modes.
Poor arc characteristics in all
processes.
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
voltages 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.
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 voltage from
#215 to #220 should drop to
zero.
2. Perform the
Firing Board
Test
.
3 Perform the
SCR Output
Bridge Test
.
4. The control board may be
faulty - Replace.
1. Check the Mode Switch
(SW4) and the associated
wiring for loose or faulty con-
nections. 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 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.
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CAUTION