Flashing Voltage Test Procedure (Engine Not Running) - Lincoln Electric Fleet 400 Service Manual

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LINCOLN ELECTRIC

FLASHING VOLTAGE TEST PROCEDURE (ENGINE NOT RUNNING)

Service and repair should be performed by only Lincoln Electric factory trained personnel. Unauthorized

repairs performed on this equipment may result in danger to the technician or machine operator and will

invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety

notes and precautions detailed throughout this manual. 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.

TEST DESCRIPTION

This test checks the flashing voltage with the engine stopped.

MATERIALS NEEDED

Volt/Ohmmeter

Wiring Diagram

TEST PROCEDURE

1. Turn off the engine on the Fleet 400 machine.

2. Perform the Case Cover Removal Procedure.

3. Perform the Chopper Module Capacitor Discharge Procedure.

4. Make sure that the battery is fully charged and in good condition and the battery connections are

clean and tight.

5. Connect the voltmeter probes to the terminals of the field capacitor.

6. Place the 'RUN/STOP' switch in the 'RUN' position (the engine protection light should remain on).

7. Measure the voltage; it should read about 7 to 8 VDC.

8. If the meter reading indicates battery voltage, about 12 to 14 VDC, the rotor may be open or the

brushes may be faulty or not making proper contact with the slip rings.

9. Set the 'RUN/STOP' switch to the 'STOP' position.

10. Perform the Rotor Resistance and Ground Test Procedures (Static) and (Dynamic). Perform the

Brush and Slip Ring Service Procedure.

11. If the voltage measures zero or very near zero; check the flashing diode (D1) and the flashing

resistor (R1 10 ohm) and associated wiring, this condition could be caused by a poor connection.

See Wiring Diagram.

12. Perform the Case Cover Replacement Procedure.

Fleet™ 400 Service Manual

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