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TROUBLESHOOTING & REPAIR
F-17 F-17
RANGER 300 D AND 300 DLX
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 wire feeder does not work
when connected to the welder 14-
pin amphenol (DLX machines
only).
1. Check circuit breaker CB1.
Reset if tripped.
2. The wire feeder control cable
may be faulty. Check or
replace.
3. The wire feeder may be faulty.
Check or replace.
1. Check for the presence of
115VAC at leads #31A and 32.
See the Wiring Diagram.
2. Check for the presence of
42VAC at leads #31B to #42.
See the Wiring Diagram.
3. If any of the above voltages are
missing or low, check the circuit
breaker CB1 for proper opera-
tion.
4. The RF bypass board may be
faulty. Check or replace.
5. Perform the Auxiliary and
Field Winding Voltage Test.
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
1-800-833-9353.