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TROUBLESHOOTING & REPAIR
F-11 F-11
RANGER 10-LX
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
CAUTION
If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con-
tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call
216-383-2531 or 1-800-833-9353.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
ENGINE PROBLEMS
Engine will not go to high idle when
attempting to weld. Welding out-
put is normal when Idler switch is
in “HIGH” position. Automatic idle
function works properly when the
auxiliary power is loaded.
1. Make sure the welding cables
and connections are tight.
1. Check for broken or faulty con-
nections in the sensing leads
(#254 and #254A, #241 for CV
mode). Make sure their con-
nections are tight at the work
output terminal, Polarity mode
switch, and CV output contac-
tor. See Wiring Diagram.
2. Make sure leads #254 and
#254A are looped three times
through the current sensor on
the control board. For CV oper-
ation, make sure leads #240,
#241, and #242 have continuity
(zero ohms) from their connec-
tion points to the control board
plug J2. See Wiring Diagram.
3. If the automatic idle function
works correctly in the constant
current (CC) mode but NOT in
the constant voltage (CV)
mode, the control board may
be faulty. Replace.