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F-63

TROUBLESHOOTING & REPAIR

F-63

 

CHOPPER MODULE FUNCTION TEST (CONTINUED)

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TEST PROCEDURE (CONTINUED)

13.If about 58 VDC is present at chopper module terminals B2+ to B3-, and B5+ to B6-, but not at the output terminals, there is a problem between the chopper module and one of the output terminals. Check for damaged conduc- tors or faulty connections, on leads W7, W8, W9, and W10. Also check the shunt, the choke, and the connections at the back of the output terminals. See the wiring diagram.

14.If the voltage at terminals B2+ to B3-, and B5+ to B6- of the Chopper module is significantly higher than 58 VDC, check for an open R4 load resistor. See the Control Inner- Connection diagram. Also check for damaged conductors or faulty connections at leads #302 and #302. See wiring diagram.

15.If the voltage at terminals B2+ to B3-, and B5+ to B6- of the chopper module is very low, or not present, use the frequency counter to check for the presents of a 20 kHZ PWM signal between leads #23 +and #25-, where they con- nect to the chopper module PC board.

16.If the 20 kHz signal is present, the chopper module is defective. Replace.

17.If the 20 kHz signal is not present, perform the Weld Control Board PWM Gate Signal Test.

18.If the weld control board is producing a PWM gate signal, check th e#23 and #25 leads for damaged conductors and faulty connections between the control PC board and the chopper module.

19.If testing is complete, Perform the Case Cover Replacement procedure.

VANTAGE® 400

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Lincoln Electric 400 service manual Toc

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.

One of the main features of the Lincoln Electric 400 is its multi-process capability. It seamlessly integrates MIG, TIG, and stick welding processes into a single unit, allowing users to switch between methods depending on the job at hand. This flexibility makes it incredibly suitable for a wide range of materials, including steel, stainless steel, and aluminum.

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.

In terms of durability, the Lincoln Electric 400 is designed for rugged environments. Its heavy-duty construction, including a robust metal casing and protective features, ensures it can withstand the rigors of daily use in harsh conditions. Furthermore, the welder is often praised for its efficient cooling system, which prolongs the machine's lifespan and maintains optimal performance even during extended usage.

Portability is another key aspect of this welding machine. Weighing under 200 pounds, it is designed with mobility in mind. The integrated wheels allow for easy transportation between job sites, making it a practical choice for mobile welders and contractors.

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.