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F-11 F-11
RANGER 250
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
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
1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
The engine will not go to high idle
when attempting to weld or when
the auxiliary power is loaded.
Welding output and auxiliary power
outputs are normal when IDLER
switch is in the " HIGH" position.
1. Make sure the welding cables
and auxiliary power lead con-
nections are tight.
1. Check the Current Sensing
Toroid leads for loose or faulty
connections. See the Wiring
Diagram.
2. The Current Sensing Toroid
may be faulty.
3. The Control Board may be
faulty.
The machine goes to low idle but
does not stay at low idle.
1. Make sure there is NOT an
external load (auxiliary or weld)
connected to the Ranger 250.
1. The idler solenoid linkage may
be misadjusted or damaged.
2. The idler solenoid lead connec-
tions (#210C and #215) may be
loose or damaged.
3. Perform the Idler Solenoid
Test.
4. The Control Board may be
faulty.
CAUTION