Lincoln Electric NA-5NF, NA-5SF service manual T2 Transformer Test, Drive Motor Test

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

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F-5

TROUBLESHOOTING & REPAIR

F-5

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

COURSE OF ACTION

 

 

 

 

 

 

 

WIRE FEEDING PROBLEMS

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The wire does not feed. Pressing any of the switches (buttons) will NOT feed the wire. The motor does NOT run.

1.Make sure input power switch is ON.

2.Check the circuit breaker (CB1). Reset if tripped.

3.Make sure 115VAC is being applied to the control box through the control cable receptacle. Leads #31 and #32.

4.Check the two fuses on the power board. Replace if blown. If fuse F101 immediately fails when replaced contact your local Lincoln Authorized Field Service Facility.

5.Make sure the motor cable is con- nected to the motor receptacle on the NA-5 control box.

1.Check the lights (LEDS) locate on the PC boards. Some should be lit. See Table F.1. If none of the lights are lit perform the T1 and

T2 Transformer Test.

2.If the appropriate lights are lit (see Table F.1.) and the wire does NOT feed perform the Wire

Drive Motor Test.

3.If only some of the appropriate lights on the power board are lit the power board may be faulty.

4.If all of the appropriate lights are lit, except light 1D on the power, board, check resistor R1. Normal resistance is 2 ohms. See wiring diagram.

5.If fuse F101 immediately fails when input power is applied, unplug all of the PC boards except the power board. If the fuse still fails the power board may be faulty. If the fuse does not fail reconnect the PC boards one at a time until the faulty board is located. Also check and inspect the wiring harness for “short” or “grounds”. Reconnect the PC boards in the following order: control, voltage,logic,pro- cedure,option,timer, remote inter- face,speedmeter and voltmeter.

NOTE: Some of the above PC boards are optional and may not be used in all NA-5 control units.

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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 T2 Transformer Test, 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.