Lincoln Electric RANGER 305G EFI Service Manual page 11

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
No auxiliary power at one or
more receptacles or at the 14
pin Amphenol receptacle.
Weld output is normal and the
engine operates normally.
The machine has low welding
output and low auxiliary
output.
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 1-888-935-3877.
POSSIBLE AREAS OF
MISADJUSTMENT(S)
OUTPUT PROBLEMS
1. Check for loose or faulty
connections at any leads
attached to the auxiliary output
receptacles or to the 14 pin
Amphenol receptacle.
1. The engine RPM may be too
low.
2. The brushes may be worn,
sticking or poorly seated.
Ranger® 305G EFI Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check for tripped circuit
breakers and/or tripped GFCI
receptacles.
2. Perform the Stator Voltage
Test Procedure.
1. The high idle speed may be
low.
NOTE: If the engine high idle
RPM is normal but the engine
slows down excessively when
the machine is placed under a
normal welding or auxiliary
load, the engine may have lost
horsepower and may be in
need of service.
NOTE: Normal full load engine
speed should be about 3500
RPM.
2. Inspect and, if necessary,
service the brushes and slip
rings per the Brush and Slip
Ring Service Procedure.
3. Perform the Rotor Voltage
Test Procedure.
4. Perform the Stator Voltage
Test Procedure.
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