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F-24

TROUBLESHOOTING & REPAIR

F-24

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

(SYMPTOMS)

 

 

MISADJUSTMENTS(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

 

 

 

 

After pressing the stop button, the

1.

Carefully disconnect the #2 lead

1.

The 3CR relay may be faulty.

electrode “Hot” light goes OFF, but

 

from the power source terminal

 

The contacts (terminals 2 and 4)

the electrode wire remains electrical-

 

strip. The welding voltage should

 

may be stuck closed.

 

ly hot. (The welding voltage is

 

be disabled. If the welding volt-

 

 

 

always present). The wire stops

 

age is still present the power

2.

Check the associated leads for

feeding.

 

 

source is faulty.

 

misconnections. See wiring dia-

 

 

 

 

 

gram.

 

 

 

2. Check or replace the control

 

 

 

 

 

 

cable between the power source

 

 

 

 

 

 

and the NA-5 unit.

 

 

 

 

 

 

 

 

After pressing the stop button, the

1.

If a crater option module is used,

1.

If, while pressing the stop button,

weld light remains on and the wire

 

check to make sure the logic

 

light 7C does NOT go on,

check

continues to feed.

 

 

board jumper (#694) is on pin

 

the stop button and associated

 

 

 

P10.

 

leads.

 

 

 

2. While pressing the stop button

 

 

 

 

 

 

observe light 7C located on the

 

 

 

 

 

 

logic board. It should be lit. If

 

 

 

 

 

 

light 7C is ON and the wire feed-

 

 

 

 

 

 

ing and welding does not stop,

 

 

 

 

 

 

the logic board may be faulty.

 

 

 

 

 

 

 

 

The set and actual speed meter

1.

Made sure the calibration jumper

1.

Remove the drive motor end cap

readings match within a few IPM, but

 

on the speedmeter board is con-

 

and the tach cover plate from the

both are in error.

 

 

nected properly. See Operation

 

end of the wire drive motor.

 

 

 

Section.

 

Check to make sure the slotted

 

 

 

 

 

disc is secure and aligned and

 

 

 

 

 

rotates freely through the center

 

 

 

 

 

of the module pick-up.

 

 

 

 

 

2. Perform the Wire Speed

 

 

 

 

 

 

Accuracy Test

 

 

 

 

 

3. Perform the Meter Circuit

 

 

 

 

 

 

Accuracy Test.

 

 

 

 

 

4. The control board may be faulty.

 

 

 

 

 

Replace.

 

 

 

 

 

 

 

 

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-5NF, NA-5SF service manual Problems Possible Areas, Section, Accuracy Test
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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.
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