Lincoln Electric VANTAGE SVM178-B Service Manual page 200

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The machine goes to low idle but
does not stay at low idle.
The welding arc is "cold." The
engine runs normally. The auxiliary
power 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)
ENGINE PROBLEMS
1. Make sure there is NOT an
external load (auxiliary or weld)
connected to the Vantage 500.
WELDING PROBLEMS
1. Check for loose or faulty con-
nections at the weld output ter-
minals and welding cable con-
nections.
2. The welding cables may be too
long or coiled, causing an
excessive voltage drop.
3. Make sure the electrode (wire,
gas, voltage, current etc.) is cor-
rect for the process being used.
CAUTION
VANTAGE® 500
RECOMMENDED
COURSE OF ACTION
1. The idler solenoid linkage may
be misadjusted or damaged.
2. The idler solenoid lead connec-
tions may be loose or dam-
aged. See the Wiring Diagram.
3. Perform the Idler Solenoid
Test.
4. Pull coil board may be faulty
except tier II Cummins code
11181.
5. The Weld Control PC board
may be faulty.
6. Tier II Cummins governor con-
trol board may be faulty see
EGC test & adjustment.
1. Check for the correct OCV at
the welding output terminals. If
the correct voltage is present
at the output terminals, check
for loose connection on the
heavy current carrying leads
inside the Vantage 500. See
the Wiring Diagram.
2. If the OCV is low at the welder
output terminals, perform the
Engine Throttle Adjustment
Test.
3. Perform the Output Rectifier
Bridge Test.
4. Perform the Stator Voltage
Test.
5. Perform the Chopper Module
Test.
6. The Weld Control PC board
may be faulty.
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