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F-7
TROUBLESHOOTING & REPAIR
F-7
INVERTEC V250-S
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.
CAUTION
OUTPUT PROBLEMS
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
No output - Main input fuses open,
indicating excessive current draw.
The machine operates normally
when connected for 200 - 230VAC
input. There is no output when the
machine is connected to 380VAC or
higher.
1. Inspect input leads for possible
shorts or grounds or mis-connec-
tions.
2. Install new fuses and reapply
power. If fuses open again, con-
sult a Lincoln Authorized Field
Service Facility.
1. Check the input voltage and input
voltage reconnect procedures.
See
Installation Section
of this
manual.
1. Inspect interior of machine for
physical signs of electrical and
heat damage. Replace any dam-
aged components after conduct-
ing the following tests.
2. Perform the
Input Rectifier Test
.
3. Perform
Power Board
Resistance Test
.
4. Check the reconnect switch and
associated leads for “shorts” or
faulty wiring.
1. Perform the
Capacitor Balance
Test
.
2. Perform the
Protection Circuit
Test
.
3. Perform the
Auxiliary
Transformer Test
.
4. Perform the
Power Board
Resistance Test
.
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