Lincoln Electric Ranger 305D Service Manual page 73

F-19
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine will not go to high idle
when using auxiliary
Auxiliary power is normal when the
idler switch is in the "HIGH" posi-
tion. And the automatic idle func-
tion works properly when welding.
The engine will not go to high idle
when striking an arc. The automat-
ic idle system functions normally
when using auxiliary
Welding and auxiliary outputs are
normal when the idle switch is in
the "HIGH IDLE" position.
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.
TROUBLESHOOTING & REPAIR
All manuals and user guides at all-guides.com
POSSIBLE AREAS OF
MISADJUSTMENT(S)
ENGINE AND IDLE PROBLEMS
1. The load on the auxiliary recep-
power. tacle may be too low. The auto-
matic idle system will not func-
tion reliably if the load is less
than 100 watts.
2. The device connected to the
auxiliary power may be defec-
tive; 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 insuf-
ficient to activate the automatic
idle system.
type may require that the idler
switch be in the "HIGH IDLE"
position.
1. Check that the welding cables
are in good condition and the
connections are tight.
power. sure that
attached to clean, bare metal.
CAUTION
RANGER 305D
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check that leads #3 and #6 are
properly routed through the
torodal current sensor.
lead must have two turns and
must pass through the sensor in
opposite directions.
wiring diagram.
should be wrapped tightly and
tie-wrapped in place.
2. Check the toriodal current sen-
sor for an 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 P3 connector on
the control Pc board.
Devices of this
4. Unplug plug P3 from the control
PC board and check for dam-
aged, dirty, or corroded pins.
5. Measure the resistance of the
toridal current sensor. Measure
between P3-3 and P3-4; the
meter should read about 10 to
14 ohms
6. If the current sensor is shorted
or open, replace it.
7. The control PC board may be
defective.
1. The weld control PC board may
be defective.
Make
work clamp is
F-19
Each
See the
The leads