Troubleshooting Guide - Lincoln Electric Fleet 650 Service Manual

LINCOLN ELECTRIC

Troubleshooting guide

Observe Safety Guidelines
detailed in the beginning of this manual.
PROBLEMS
(SYMPTOMS)
Major physical or electrical
damage is evident when the
sheet metal covers are
removed.
No welding output or auxiliary
power. The engine operates
normally.
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. Contact your local
authorized Lincoln Electric
Service Facility.
1. Check for loose or faulty
connections in the auxiliary
circuit to the output
receptacles and/or the weld
circuit to the output terminals.
See Wiring Diagram.
2. Check the brushes for wear
and proper contact to the rotor
slip rings.
Fleet™ 650 Service Manual
TROUBLESHOOTING GUIDE
RECOMMENDED
COURSE OF ACTION
1. Contact the Lincoln Electric
Service Department at 1-888-
935-3877.
1. Perform the Brush And Slip
Ring Service Procedure.
2. Check for flashing voltage at
the slip rings (3 – 5 VDC @ .5
amp until generator builds up,
then 160 volts). Perform the
Flashing Voltage Test
Procedure (Engine Not
Running).
3. Perform the Flashing Diode
(D1) & Field Diode (D2) Test
Procedure.
4. Perform the Rotor Voltage
Test Procedure.
5. Perform the Rotor
Resistance And Ground Test
Procedure (Static).
6. Perform the Rotor
Resistance And Ground Test
Procedure (Dynamic).
7. Perform the Stator Voltage
Test Procedure.
5