Lincoln Electric NA-5SF, NA-5NF Possible Areas Recommended Symptoms, Course of Action, Test

Models: NA-5S NA-5N NA-5SF NA-5NF

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F-6

TROUBLESHOOTING & REPAIR

F-6

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

WIRE FEEDING PROBLEMS

 

 

 

 

 

 

 

 

The wire will not feed and the circuit

1.

Check for a mechanical restric-

1.

Perform the Wire Drive Motor

breaker (CB1) trips when the inch

 

tion in the wire feeding path.

 

Test.

 

down, inch up or the start buttons

 

 

 

 

 

are pressed. The wire drive motor

2.

Make sure the proper input volt-

2.

The power board may be faulty.

does not turn.

 

age (115VAC) is applied to the

 

See Table F.1.

 

 

 

 

NA-5 control unit.

 

 

 

 

 

 

 

3. Check the motor control cable for

 

 

3.

Check the F102 field fuse on the

 

“shorts’ or “grounds”.

 

 

 

 

power board. Replace if faulty.

 

 

 

 

 

 

Note: Frequent motor polarity

 

 

 

 

 

 

changes can cause the fuse to

 

 

 

 

 

 

fail. This can be caused by the

 

 

 

 

 

 

following:

 

 

 

 

 

 

•A welding procedure with

 

 

 

 

 

 

frequent electrode to puddle

 

 

 

 

 

 

shorting.

 

 

 

 

 

 

•A power source output too

 

 

 

 

 

 

low to establish an arc.

 

 

 

 

 

 

 

 

 

When the inch up button is press the

1.

The welding head is designed to

 

 

 

wire feeds down. When the inch

 

feed wire in the proper direction

 

 

 

down button is pressed the wire

 

when it is installed as shipped

 

 

 

feeds up.

 

 

from the factory. If the nozzle

 

 

 

 

 

 

and wire straightener aare rotated

 

 

 

 

 

 

about the axis of the gearbox

 

 

 

 

 

 

outpu shaft, the wire may feed in

 

 

 

 

 

 

the opposite direction.

 

 

 

 

 

 

Interchange leads #626 and #627

 

 

 

 

 

 

at the terminal strip (TS2) inside

 

 

 

 

 

 

the control box. See wiring dia-

 

 

 

 

 

 

gram.

 

 

 

 

 

 

 

 

 

 

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

NA-5

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Lincoln Electric NA-5SF, NA-5NF Possible Areas Recommended Symptoms, Course of Action, Perform the Wire Drive Motor, Test

NA-5S, NA-5N, NA-5SF, NA-5NF specifications

The Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S are advanced welding helmets that are pivotal in enhancing the safety and efficiency of welders in various applications. These models are designed to provide exceptional protection and visibility, making them indispensable tools in the welding industry.

One of the main features of the NA-5 series is the auto-darkening filter technology. This feature allows the helmet to automatically adjust its shade based on the intensity of the arc. As the welder strikes an arc, the lens darkens instantaneously, shielding the eyes from harmful rays generated during the welding process. This functionality not only ensures safety but also enhances productivity, as welders do not need to manually flip the helmet up and down.

The helmets are equipped with a wide viewing area that allows for better visibility and precision while working. With a large lens, welders can easily monitor their work and surrounding environment, minimizing the risk of accidents. Additionally, the lightweight design of the NA-5NF, NA-5SF, NA-5N, and NA-5S provides comfort during extended periods of use, reducing neck strain and fatigue.

The NA-5 series is also well-regarded for its durability. Constructed from impact-resistant materials, these helmets can withstand the rigors of demanding work environments. This durability extends the lifespan of the helmet, making it a cost-effective investment for both professional and hobbyist welders.

Another notable characteristic is the adjustable sensitivity and delay settings found in certain models. These settings allow the user to customize the helmet based on their specific welding conditions. For instance, a welder can increase sensitivity for low-amperage tasks or adjust the delay to allow for a smoother transition from dark to light after completing a weld.

Furthermore, the helmets come with a reliable battery life, ensuring that they can be used for long periods without interruption. Some models also feature solar assist functionality, which helps recharge the auto-darkening filter, enhancing their overall efficiency.

In summary, the Lincoln Electric NA-5NF, NA-5SF, NA-5N, and NA-5S welding helmets represent a significant advancement in personal protective equipment for welders. Their combination of auto-darkening technology, wide viewing area, lightweight design, durability, and customizable settings makes them an excellent choice for anyone engaged in welding tasks. With these helmets, users can achieve greater safety and efficiency in their work, enabling them to focus on their craft with peace of mind.