Lincoln Electric RANGER 305G EFI Service Manual page 26

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine will not go to high
idle when using auxiliary
power. Auxiliary power is
normal when the idler switch is
in the "HIGH" position and the
automatic idle function works
properly when welding.
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the
Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-888-935-3877.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
ENGINE AND IDLE PROBLEMS
1. The load on the auxiliary
receptacle may be too low. The
automatic idle system will not
function reliably if the load is
less than 100 watts.
2. The device connected to the
auxiliary power may be
defective; try using another
device.
3. Make sure that the
connections to the auxiliary
devices are tight.
4. Some devices are designed
to sense for adequate input
power. Products of this type
may not turn on due to the low
voltage and frequency of the
idling machine. If this happens,
the current draw will likely be
insufficient to activate the
automatic idle system. Devices
of this type may require that
the idler switch be in the "HIGH
IDLE" position.
Ranger® 305G EFI Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. 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 opposite directions. See
Wiring Diagram. The leads
should be wrapped tightly and
tie-wrapped in place.
2. Check the toroidal current
sensor for any signs of damage.
3. Check leads 260 and 261 for
poor connections and damage
to the conductors and
insulation between the toroidal
current sensor and the J3
connector on the weld control
board.
4. Unplug plug J3 from the
weld control board and check
for damaged, dirty or corroded
pins.
5. Measure the resistance of
the toroidal current sensor.
Measure between J3-3 and J3-
4; the meter should read about
10 to 14 ohms.
6. If the current sensor is
shorted or open, replace it.
7. The weld control board may
be defective.
21