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Lincoln Electric DC-400 manual TROUbLESHOOTING

Models: DC-400

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E-5

TROUbLESHOOTING

E-5

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

PRObLEMS

(SYMPTOMS)

POSSIbLE

CAUSE

RECOMMENDED

COURSE OF ACTION

Poor arc striking with semiautomatic

1.

Defective start circuit.

1.

Check Start PC Board and reed

or automatic wire feeders.

 

 

 

switch CR3.

 

2.

Poor work connection.

2.

Work connection must be ade-

 

 

 

 

quate for application.

 

3.

Improper procedures.

3.

Adjust procedures for improved

 

 

 

 

starting.

 

4.

Defective Control PC Board.

4.

Replace. See Procedure for

 

 

 

 

Replacing PC Boards.

 

 

 

 

 

Poor arc characteristics.

1.

Start circuit energized at all times

1.

Short reed switch CR3 leads

 

 

(read switch CR3 not closing).

 

together. If welding improves,

 

 

 

 

replace reed switch.

 

2.

Defective Start PC Board.

 

 

 

 

 

2.

If problem is still present with

 

 

 

 

reed switch shorted, unplug Start

 

 

 

 

PC Board. If problem disap-

 

 

 

 

pears, replace Start PC Board.

 

3.

Defective Control PC Board.

3.

Replace. See Procedure for

 

 

 

 

Replacing PC Boards.

 

4.

Capacitor(s) in output circuit

4.

Replace entire bank of capaci-

 

 

failed. A failure is indicated if the

 

tors. Do not replace individual

 

 

small vent plug on top of a capac-

 

capacitors.

 

 

itor is raised or blown out.

 

 

WARNING:

The liquid electrolyte in these capacitors is toxic. Avoid contact with any portion of your body. Clean up vented electrolyte using rubber gloves and a water damped cloth. Any electrolyte which gets on skin, clean with soap and water.

ARC CONTROL has no effect in CV

1.

Defective R1, L1, S4C, S4D actu- 1.

Check and replace if found defec-

(FCAW/GMAW) mode with short cir-

 

ator or S5.

 

tive. (If S4C or S4D actuator is

cuit transfer processes.

 

 

 

found defective, replace mode

 

 

 

 

switch cam also.)

 

 

 

 

 

115VAC Receptacle not working.

1.

Circuit Breaker Tripped.

1.

Reset circuit breaker. Make sure

 

2.

Defective Circuit Breaker.

 

load on does not exceed 15A rat-

 

3.

Broken connection in wiring.

 

ing of circuit breaker.

 

 

 

2.

Replace

 

 

 

3.

Check all wiring going to recepta-

 

 

 

 

cle and circuit breaker for possible

 

 

 

 

broken connection.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

IDEALARC® DC-400

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Lincoln Electric DC-400 manual TROUbLESHOOTING
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DC-400 specifications

The Lincoln Electric DC-400 is a versatile and robust DC arc welding power source designed to meet the demands of various industrial applications. Known for its reliability and performance, the DC-400 is ideal for both professional welders and fabrication shops requiring robust equipment that can handle challenging welding tasks.

One of the main features of the DC-400 is its ability to provide a smooth, stable arc, which is essential for achieving high-quality welds. This welding machine is capable of delivering a wide amperage range, typically from 20 to 400 amperes, making it suitable for various welding processes, including MIG, TIG, and Stick welding. The unit's high output capabilities allow it to effectively weld a variety of materials, such as steel, stainless steel, and various alloys.

In terms of technology, the DC-400 integrates advanced power conversion technology that enhances energy efficiency while minimizing heat loss during operation. This not only contributes to lower operating costs but also ensures a longer service life for the machine. The DC-400 features a durable, rugged design, with a robust steel frame that can withstand the rigors of heavy industrial use while providing an IP23 rating for protection against moisture and dust.

Another notable characteristic of the DC-400 is its ease of use. The intuitive controls allow for quick adjustments to settings, enabling welders to easily adapt to different job requirements. The arc characteristics of the DC-400 can be fine-tuned to optimize performance for different welding applications, ensuring consistent results every time.

Moreover, the DC-400 is equipped with built-in safety features such as thermal overload protection, which prevents damage to the machine in case of prolonged operation under heavy loads. This feature enhances the safety of the operator and extends the life of the welding machine.

Overall, the Lincoln Electric DC-400 stands out as a reliable and efficient welding power source. Its combination of high-performance capabilities, advanced technology, and next-level usability makes it a popular choice in the industry. Whether for heavy fabrication, maintenance, or repair work, the DC-400 continues to prove itself as an indispensable tool for professional welders seeking quality and durability in their equipment.