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OUTPUT PROBLEMS
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
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.
CAUTION
TROUBLESHOOTING AND REPAIR
F-4 F-4
INVERTEC® V450-PRO
Major physical or electrical
damage is evident when the
sheet metal covers are removed.
Contact the Lincoln Electric
Service Department at 1-888-
935-3877.
The input fuses repeatedly fail or
the input circuit breakers keep
tripping.
The input fuses fail or input
breakers trip after the CR-1
contactor closes
1. Input fuses or breakers may be
improperly sized.
2. The reconnect panel may not
be configured properly for the
applied voltage.
1. Input fuses or breakers may be
improperly sized.
2. The reconnect panel may not
be configured properly for the
applied voltage.
3. A component in the input
circuitry has failed.
1. Check the reconnect panel
connections and associated
wiring. See the Wiring
Diagram and Input
Information in Section A for
the proper input voltage.
Check the input voltage and
make sure it is correct.
1. Check the re-connect panel
connections and associated
wiring. See the Wiring
Diagram and Input
Information in Section A.
2. Perform the Input Rectifier
Test. If the Input Rectifier is
defective, perform tests 3 and
4.
3. Perform the IGBT Switch
Board Test.
4. Perform the Input Board Test
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