Lincoln Electric Cross Country 300 Service Manual page 28

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine will not idle down
to low RPM. The machine has
normal weld and auxiliary
output.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
ENGINE PROBLEMS
1. Make sure the idle switch is
in the 'Auto Idle' position.
2. Make sure there is no
external load on the weld
terminals or the auxiliary power
receptacles.
3. Check for mechanical
restrictions in the idler solenoid
linkage.
Cross Country™ 300 Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Perform the Idler Solenoid
Test Procedure.
2. Check for damaged wiring or
faulty connections at the idle
solenoid, the engine protection
board, the run/stop switch and
the start button.
3. Check for loose or damaged
wiring or faulty connections at
leads 405, 226, 227 and
connections J/P-55-2 and J/P-
55-4, (control board J32-2, B3
and J31-8). See Wiring
Diagram.
4. Perform the Weld Control
Board Voltage Test.
5. Check that leads 3 and 6 are
properly routed thru the
toroidal current sensor. See
Wiring Diagram. The leads
should be wrapped tightly and
tie wrapped in place.
6. Check the toroidal current
sensor for any signs of damage.
7. Check leads 260 and 261 for
poor connections and damage
to the conductors and
insulation between the toroid
current sensor and the J3
connector in the control board.
Unplug plug J3 from the control
board and check for damaged,
dirty or corroded pins.
8. Measure the resistance of
toroidal current sensor.
Measure between J3-3 and J3-
4, the resistance should be 3-4
ohms. If the sensor is shorted
or open replace it.
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