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TROUBLESHOOTING & REPAIR
F-16 F-16
RANGER 9 RANGER 9
TROUBLESHOOTING GUIDE Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
POSSIBLE AREAS OF
MISADJUSTMENT(S)
RECOMMENDED
COURSE OF ACTION
FUNCTION PROBLEMS
The contactor does not pull in
when scratch starting when the
engine goes to high idle.
1. Make sure the WELDING TER-
MINALS switch (S6) is in the
“ALWAYS ON” position.
1. Check the WELDING TERMI-
NAL switch (S6) and associated
wiring.
2. Check for the presence of
12VDC from lead #224 (+) to
lead #232 (-) at the output con-
tactor. If the correct voltage IS
present and the contactor does
not activate, then the contactor
may be defective. Replace.
3. If the correct voltage is NOT
present in step #2, check from
lead #224 to ground (lead #5)
for the presence of 12VDC. If
the 12VDC is present, then
check lead #232A to the Idler
printed circuit board.
4. The printed circuit board may
be faulty. Replace.
5. If 12VDC is NOT present from
lead #224 to ground (lead #5),
then check the #224 lead for an
open circuit. See Wiring
Diagram.
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.