INVERTEC V300-I
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F-5
TROUBLESHOOTING & REPAIR
Observe Safety Guidelines
detailed in the beginning of this manual.
Troubleshooting Guide
— See Wiring Diagrams for location of specified
components. See Schematic Diagram for troubleshooting of specific circuits.
PROBLEMS
(SYMPTOMS)
No ouput. Main fuses open, indicat-
ing excessive current draw.
Machine does not produce more
than 250 amps on meter (while
welding) when connected to
3-phase supply.
Machine does not produce more
than 250 amps on meter (while
welding) while connected to single-
phase supply.
Machine operates okay at 230 VAC
or lower. No output at 380 VAC or
higher.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
Inspect input leads for possible
shorts or grounds or misconnec-
tions.
Install new fuses and reapply
power. If fuses open again, go to
next column of this Guide.
Check input voltages, fuses, and
input voltage reconnect proce-
dures. See Installation section of
this manual..
Normal operation.
Nothing is wrong.
Check input voltage and input volt-
age reconnect procedures. See
Installation section of this manual.
POSSIBLE AREAS OF
MALFUNCTION(S)
Inspect interior of machine for
physical signs of electrical and heat
damage. Replace any damaged
components after conducting the
tests below:
1.
Input Rectifier (component
D13). Perform Input Rectifier
test.
2.
See Switch Board test.
3.
See Static Capacitor
Balance/Dynamic Capacitor
Balance tests.
4.
See Snubber Resistor test.
1.
See Protection Board Output.
Voltage test.
2.
See Control Board test.
3.
See Input Rectifier test (com-
ponent D13).
No test necessary. This single-
phase operation is determined by
the Protection Board.
1.
See Protection Board Output
test.
2.
See Static Capacitor
Balance/Dynamic Capacitor
Balance tests.
3.
See Snubber Resistor test.
4.
See Switch PC Board test.
OUTPUT PROBLEMS (continued)
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
