Lincoln Electric VANTAGE 400 Service Manual page 68

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine will not go to high idle
when striking arc. The automatic
idle system functions normally
when using auxiliary power.
Welding and auxiliary outputs are
normal when the idle switch is in
the "HIGH IDLE" position.
The engine will not go to high idle
when attempting to strike and arc,
or when a load is applied to any of
the auxiliary power receptacles.
The engine goes to low idle, but
will not stay low idle.
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 & REPAIR
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
Check that the welding cables are
in good working condition and the
connections are tight. Make sure
the work clamp is attached to
clean, bare metal.
Check that the welding cables and
the auxiliary power lead connec-
tions are tight.
Make sure there are no auxiliary
loads on either the weld terminals
or the auxiliary receptacles.
Check that the welding cables and
the auxiliary cables and the auxil-
iary power lead connections are
tight and that the insulation is not
damaged.
CAUTION
VANTAGE® 400
RECOMMENDED
COURSE OF ACTION
Check the leads and connections
at the SHUNT at the Positive out-
put stud. Check lead 204S and
206S for continuity from the shunt
to J-6 on the Weld Control Board.
Check the pins and connections at
J-6 and J on the Weld Control
Board.
The weld control P.C. Board may
be defective.
The weld control P.C. Board may
be defective.
The Idler solenoid linkage may be
damaged or out of adjustment.
Make sure the solenoid plunger is
able to fully ease against the inter-
nal stop of the solenoid coil
assembly.
The low idle RPM may be too low.
Perform the ENGINE THROTTLE
ADJUSTMENT TEST.
The solenoid hold coil power cir-
cuit may be defective. Perform
the IDLER SOLENOID TEST.
The solenoid hold coil power cir-
cuit may be faulty. Check wiring
and connections on lead #210A
and lead #215.
The weld control PC Board may
be defective.
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