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F-48

TROUBLESHOOTING & REPAIR

F-48

 

FLASHING VOLTAGE TEST (CONTINUED)

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TEST PROCEDURE

1.Perform the Case Cover Removal Procedure.

2.Make sure that the battery is fully charged and in good condition, and the battery con- nections are clean and tight.

3.Remove leads 234 and 235 from the oil pres- sure switch. Insulate or position the lead so it cannot come in contact with chassis ground or any other wiring. See Wiring Diagram.

NOTE: Disconnecting leads 234 and 235 bypass the oil-pressure switch and simulates a running engine.

4.Place the RUN/STOP switch in the “RUN” position. (The engine protection light should remain off.)

5.Connect the voltmeter probes to brush ter- minals.

6.Measure the voltage; it should read about 3 to 5 VDC.

7.Set the RUN/STOP switch to the “STOP” position.

8.If the meter reads normal voltage of 3 to 5 VDC, this test is complete.

9.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.

10.Perform the Rotor Resistance Test.

Perform the Brush and Slip Ring Service Procedure.

11.If the voltage measures zero or very near zero; this condition could be caused by a poor connection or a defective component in the flashing circuit, or a shorted rotor winding.

11.Refer to the wiring diagram, pull plug P-23 from the control PC board and inspect each terminal. Make sure that all terminals both on the board and in the plug are clean and in good condition, and that the pins are securely crimped to the flex leads. Perform the follow- ing additional test.

13.Switch the RUN/STOP switch to the “RUN” position.

14.Use a voltmeter to check for the presents of about 12VDC, battery voltage, at the following locations on the engine protection/ idle control p.c.b.

(-) Lead #5S (B1) to (+) Lead #232 (J31-1)

(-) Lead #5S (B1) to (+) Lead #232F (J31-2)

(-) Lead #5S (B1) to (+) Lead #200 (J33-5)

NOTE: Lead #232 supplies 12VDC battery volt- age to the engine protection PC board whenever the run/stop switch is in the run position.

Lead #200 supplies DC flashing voltage from the control PC board to the positive slip ring through.

15.If battery voltage is present at all of the above points; check the top grounding stud on inside left case from and lead #5H, also check leads #200, #200B, R3. Make sure all terminals are crimped tightly to the flex leads and arc free of corrosion.

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12.Perform the Rotor Resistance Test.

VANTAGE® 400

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Lincoln Electric 400 service manual Test Procedure, Connect the voltmeter probes to brush ter- minals

400 specifications

The Lincoln Electric 400 is a state-of-the-art multi-process welding machine designed to meet the demands of today’s industrial welding applications. Renowned for its reliability and versatility, this welder is a preferred choice among professionals in fabrication, construction, and maintenance industries.

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The welding machine boasts a robust power output, with a maximum range of 400 amps. This impressive capacity enables it to handle thick materials effectively, making it ideal for heavy-duty tasks. The machine operates on both single-phase and three-phase power, giving users the advantage of versatility depending on the power source available at the job site.

Another significant characteristic of the Lincoln Electric 400 is its advanced digital display and control interface. This user-friendly panel allows for easy adjustments to voltage and wire feed speed, ensuring precision and high-quality welds. Additionally, the machine includes built-in features to improve the consistency of welding, such as the Smart MIG technology which optimizes the welding parameters automatically based on the wire diameter and material thickness.

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In conclusion, the Lincoln Electric 400 stands out in the welding equipment market due to its multi-process capabilities, impressive power output, user-friendly interface, durability, and portability. It is engineered to exceed the expectations of professional welders, providing them with the tools needed for high-quality results across a variety of applications.