Lincoln Electric Classic 300 MP Service Manual page 23

LINCOLN ELECTRIC
Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
The engine starts and runs at
the correct speed, but there is
no AC auxiliary output voltage.
The DC welding generator is
functioning properly.
There is NO CV welding output.
The auxiliary output voltage
and constant current output is
ok.
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 the AC auxiliary
output circuit breakers. Reset
is necessary.
2. Check the 115 VAC and 230
VAC receptacles and plugs for
loose or faulty connections.
1. Make sure the mode switch
is in the CV wire position.
Classic® 300 MP Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Check for loose or faulty
connections between the
receptacles, the circuit
breakers, the current
transformer and the exciter
alternator stator. See Wiring
Diagram.
1. Check the mode switch and
associated wiring. See Wiring
Diagram.
2. Perform the CV Box Test
Procedure.
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