Lincoln Electric RANGER 305G EFI Service Manual page 24

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 output and
auxiliary power.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
ENGINE AND IDLE 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.
Ranger® 305G EFI Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Perform the Idle Solenoid
Test Procedure.
2. Check for damaged wiring or
faulty connections at idle
solenoid, the run/stop switch
and the start button.
3. Check for loose or damaged
wiring or faulty connections at
leads 210C and 215 (weld
control board J2-5 and J2-6).
See Wiring Diagram.
4. Set the idle switch in the
"AUTO" position. Set the mode
switch to the CC-STICK position.
Make sure that no load is
applied to either weld output
or the auxiliary output.
5. Start the machine and allow
it to run for about 30 seconds.
6. Manually move the idle
solenoid plunger to the idle
position.
7. If the solenoid does not hold
in the low idle position, remove
plug J6 from weld control board
and wait for about 30 seconds.
8. If the engine drops to low
idle, check for damage or a
buildup of conductive materials
on or around the bypass filter
assembly and the output
terminals. See Wiring Diagram.
NOTE: The bypass filter
assembly is connected between
the output terminals. See
Wiring Diagram.
9. If the engine still does not
drop to low idle, the weld
control board is probably
19