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F-62

TROUBLESHOOTING & REPAIR

F-62

 

CHOPPER MODULE FUNCTION TEST (CONTINUED)

 

FIGURE F.16 - CHOPPER MODULE CONNECTIONS

 

 

 

23

 

 

 

 

LED1 (B1,B2,B3)

25

 

LED4

 

 

Chopper Working

 

 

PWM Signal

 

 

B1

L12683-1

B8

B4

HL W11

HL W6

 

 

 

LED4

 

 

 

LED1

 

 

 

 

 

 

 

 

B2

LED2

LED3

B5

HL W5

 

B3

 

 

B6

 

HL W4

 

 

 

 

 

 

LED2

 

HL W9

Voltage from

HL W8

Rectifier

 

 

LED3 (B4,B5,B6)

 

 

Chopper Working

SL302

 

 

 

SL301

SL13

 

SL14

 

 

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TEST PROCEDURE

1.Perform the Case Cover Removal Procedure.

2.Make sure that there is nothing plugged into either of the Amphenol receptacles.

3.Place idle switch in the “HIGH” position.

4.Place the mode switch in the “CC-STICK” posi- tion.

5.Place the Welding Terminal switch in the “REMOTELY CONTROLLED” position.

6.Start the engine and allow it to stabilize at high idle RPM.

7.Check for 80 to 100 VDC at terminals B1- to B2+ and B4- to B5+ of the chopper module. See wiring diagram and figure #1.

8.If the correct DC voltage is not present at ter- minals B1- to B2+ and B4- to B5+, check for damaged conductors or faulty connections between the chopper module, the output recti- fier, and the stator weld winding. See Figure F.17. See the wiring diagram. Perform the Stator Voltage Tests, and the Output Rectifier Test.

9.If the correct voltage is present at terminals B1- to B2+ and B4- to B5+ of the chopper mod- ule, check for DC voltage at the chopper mod- ule terminals B2+ to B3-, and B5+ to B6-, If sig- nificant voltage is present, disconnect leads #23 and #25 from the chopper module PC board. If voltage is still present, the copper module is shorted and should be replaced.

10.If the voltage drops to 0 VDC after the #23 and #25 leads have been disconnected, the control PC board is driving the chopper module when it should not be doing so. Reconnect the #23 and #25 leads and perform the Weld Control Board Gate Drive Test.

11.Reconnect leads #23 and #25, and place the Welding Terminal switch in the “WELD TERMI- NALS ON” position.

12.Check for about 58 VDC between Chopper Module Terminals B2+ to B3-, and B5+ to B6 and between the welder output terminals. See Figure F.16. See the wiring diagram.

VANTAGE® 400

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Image 110
Lincoln Electric 400 service manual Figure F.16 Chopper Module Connections

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.

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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.