Lincoln Electric VANTAGE SVM178-B Service Manual page 192

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Major physical or electrical damage
is evident.
No welding output in neither Stick or
CV modes. The engine operates
normally. The auxiliary output is
normal
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)
OUTPUT PROBLEMS
1. Contact
Authorized
Facility.
1. Place the Welding Terminals
Switch in the "ALWAYS ON"
position.
solved, the fault may be in the
external control cable (if used),
leads #2 and #4.
Wiring Diagram.
2. With the engine at high idle
(1900RPM), the machine in the
Stick mode and the OUTPUT
CONTROL at maximum, check
for the presence of approxi-
mately 87VDC (open circuit volt-
age) at the output terminals.
3. If the correct OCV is present at
the welding output terminals
check the
clamps and electrode holder for
loose or faulty connections.
CAUTION
VANTAGE® 500
1. Contact the Lincoln Electric
your local Lincoln
Field Service
1. Check for loose or faulty con-
If the problem is
See the
2. Check the Welding Terminals
3. Check gate leads #23, #23A,
4. Perform the Stator Voltage
welding cables, 5. Perform the Output Rectifier
6. Perform the Chopper Module
7. The Weld Control PC Board
RECOMMENDED
COURSE OF ACTION
Service Department at 1-888-
935-3877.
nections on the heavy current
carrying leads between the out-
put bridge, the power modules,
the choke and the output termi-
nals.
Switch and associated leads.
See the Wiring Diagram.
#25 and #25A for loose or faulty
connections. See the Wiring
Diagram.
Test.
Bridge Test.
Test.
may be faulty.
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