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F-30

TROUBLESHOOTING & REPAIR

F-30

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

 

 

 

 

 

The circuit breaker trips after the

1. Check to make sure there are not

1.

Perform the DC Power Supply

 

wire has been feeding for a period of

any mechanical restrictions in the

 

Test.

 

 

time. Welding is normal.

 

wire feeding path which could

 

 

 

 

 

 

cause excessive loading on the

2.

Perform the Wire Drive Motor

 

 

 

wire drive motor.

 

Test.

 

 

 

 

3. The power board may be faulty.

 

 

 

 

 

The 1/8 amp fuse on the voltage

1. Check to make sure the PC

1. Remove the input power to the

 

board repeatedly fails.

 

boards are NOT grounded to the

 

NA-5 and replace the 1/8 amp

 

 

 

case of the NA-5. This can hap-

 

fuse. Locate and remove the #21

 

 

 

pen due to metallic dust build-up.

 

and #67 leads from the TS1 ter-

 

 

 

 

 

minal strip.

 

 

 

 

 

 

A. Make a resistance check

 

 

 

 

 

 

from the following leads

 

 

 

 

 

 

to the NA-5 case ground-

 

 

 

 

 

 

ing screw. Lead #510A,

 

 

 

 

 

 

510P, 500, 515 and 525.

 

 

 

 

 

 

B. The resistances should

 

 

 

 

 

 

be above 1000 ohms. If

 

 

 

 

 

 

any tests are below 1000

 

 

 

 

 

 

ohms that circuit has low

 

 

 

 

 

 

resistance to case

 

 

 

 

 

 

ground. Isolate faulty

 

 

 

 

 

 

leads or PC board. See

 

 

 

 

 

 

wiring diagram and

 

 

 

 

 

 

schematic.

 

 

 

 

 

 

 

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 service manual Circuit breaker trips after Check to make sure there are not

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.