Lincoln Electric VANTAGE 400 Service Manual page 67

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Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine will not idle down to
low RPM. The machine has nor-
mal weld and auxiliary output.
(continued)
The engine will not go to high idle
when using auxiliary power.
Auxiliary power is normal when the
idler switch is in the "HIGH" idle
position, the automatic idle func-
tion works properly when welding.
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
The load on the auxiliary recepta-
cle may be too low.
The automatic idle system will not
function reliably if the low is less
than 100 Watts.
The device connected to the auxil-
iary power may be defective try
another device.
Make sure the connections to the
auxiliary device are tight.
Some device are designed to
sense for adequate input power.
Product of this type may not turn
on due to low voltage and frequen-
cy of the idling machine. If this
happens the current draw will like-
ly be insufficient to activate the
automatic idle system. Device of
this type may require that the Idler
switch be in the "HIGH IDLE" posi-
tion.
CAUTION
VANTAGE® 400
RECOMMENDED
COURSE OF ACTION
Measure the resistance of toroidal
current sensor. Measure between
#P-3 and #P-4, the resistance
should be 4.1 Ohms.
If the sensor is shorted or open
replace it.
The control board may be bad.
Check that leads #3 and #6 are
properly routed through the
toroidal current sensor.
Each lead must have two turns
and must pass through the sensor
in the opposite directions. See
wiring diagram. The leads should
be wrapped tightly and tie
wrapped in place.
Check the toroidal current sensor
for any signs of damage.
Check leads #260 and #261 for
poor connections and damage to
the conductors and insulation
between the toroid current sensor
and the P3 connector in the con-
trol PC board.
Unplug plug P3 from the control
PC board and check for damaged,
dirty, or corroded pins.
Measure the resistance of the
toroidal current sensor. Measure
between #P-3 and P-4, the resis-
tance should be 10-14 Ohms.
If the sensor is shorted or open
replace it.
The control P.C. Board may be
defective.
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