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
(For codes above 8300) Jumper the AUTO tabs on the voltage board and press inch down button. If the wire does NOT feed down the logic board may be faulty.
2. If the voltage is over 19 volts and the wire DOES inch down with the #21 lead disconnected reconnect the #21 lead to the terminal strip and read the ACTUAL volts with the inch down button pressed. If the voltage is less than 8 volts per- form the #21 - #67 External Resistance Test. If the resis- tance test is OK the voltage board may be faulty. Replace.
2. Check to see if light 7J on the logic board is ON while the inch down button is pressed. If it does NOT light check the inch down button and associated leads. See wiring diagram.
(For codes below 8300) If light 7J DOES light when the inch down button is pressed the logic board may be faulty.
1. If a DC400, Pulse Power 500 or a 1. Disconnect the white #21 lead
CV400 power source is used a from the NA-5 polarity terminal
Diode Kit must be installed in the strip (TS1). See wiring diagram.
power source.With the inch down button pressed read the ACTUAL volts on the NA-5 digital voltmeter. The digital meter should read over 19 volts and the wire should inch down. If not, perform the
Voltage Board Transformer Test. If the test is OK the voltage board may be faulty. Replace.

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F-7

TROUBLESHOOTING & REPAIR

F-7

 

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 when the inch down button is pressed. The wire does inch up OK and feeds down when the start button is pressed.

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Lincoln Electric NA-5NF, NA-5SF service manual Troubleshooting & Repair

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.