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F-27

TROUBLESHOOTING & REPAIR

F-27

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

COURSE OF ACTION

 

 

 

 

 

 

FUNCTION PROBLEMS

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The actual volts reading does NOT match the set volts reading within a few tenths of a volt. One reading may be erratic. The NA-5 does not shut off.

1.NA-5 units with a G1556-2 (or higher) voltage board do not con- trol the actual strike voltage to match the set strike voltage. The actual strike voltage is a function of the set strike voltage and the OCV contrtol characteristics of the welding power source.

NA-5 controls with a G1556-3 (or higher) voltage board must have the jumper plug connected to the 4-cavity receptacle on the board, unless the pulsed power filter board option is connected.

2.Make sure the shutdown “BYPASS” pins are not jumpered together on the NA-5 voltage board.

3.Check the voltage sensing leads for continuity. (zero ohms). #21 lead should have continuity to the work piece and #67 lead should have continuity to the wire feed head assembly. See wiring dia- gram.

4.Put the Lincoln welding power source in the machine control mode. Check to see if the power supply can be set for the arc volt- age required for the process. If not, the power supply may be faulty.

1.If the actual reading is the prob- lem check the actual volts switch and associated leads. See wiring diagram.

2.If the set reading is the problem check the set volts switch and the asociated leads. See wiring dia- gram.

3.Perform the Voltmeter Accuracy

Test

4.Perform the Meter Circuit

Accuraty Test.

5.The voltage board may be faulty.

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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

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.