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

OUTPUT PROBLEMS

The engine starts and runs at cor-
rect speed, but there is no, or very
low, welder output voltage. There
is no AC auxiliary output voltage.

1. Check the 15 amp fuse located

on the inside of the front control
panel.

2. If the welder output is zero volts,

the fields may need to be
flashed. See

Flashing the

Fields in this section.

3. Check for loose or missing

brushes in the exciter alternator
and welding generator.

1. Check the “flashing” diode and

associated leads connected
between the generator brushes
and the exciter alternator brush-
es.

2. Check the field diode bridge and

associated leads and connec-
tions. See the Wiring Diagram.

3. Perform the

Alternator Rotor

Test.

4. Check for “opens” or shorted

turns in the alternator stator
windings. The coils must NOT
be grounded to the stator lami-
nation.