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F-20

TROUBLESHOOTING & REPAIR

F-20

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

 

PROBLEMS

POSSIBLE AREAS OF

RECOMMENDED

 

 

 

(SYMPTOMS)

MISADJUSTMENTS(S)

COURSE OF ACTION

 

 

 

 

 

 

 

 

 

FUNCTION PROBLEMS

 

 

 

 

 

 

 

The start button does not initiate the

1. If the crater and or start option

1. If light 7C is ON check the stop

power source output or the wire

boards are NOT used the jumper

button and associated leads for

feed. The mode selector switch is in

plugs must be installed in the pro-

“shorts” or “grounds”.

Light 7C

the strike position and the mode

cedure board receptacles.

should be on ONLY when the

strike light is lit.

 

stop button is pressed.

 

 

 

 

2. With the unit at idle check light 7C

 

 

 

 

 

on the logic board. It should be

2. If light 7B does NOT go on, when

 

 

OFF. Also check light 7B on the

the start button is pressed, check

 

 

logic board. With the start button

the start switch (button) and asso-

 

 

pressed light 7B should go ON. If

ciated leads for loose or faulty

 

 

lights 7C and 7B are functioning

connections. See wiring diagram.

 

 

normally the logic board may be

 

 

 

 

 

faulty.

3. Check the lead harness between

 

 

 

the logic board and the procedure

 

 

 

board for loose or faulty connec-

 

 

 

tions. See wiring diagram.

The start button initiates the power 1.

If the wire inches up properly, but

1. If the wire does not feed when the

source output, but the wire does not

does not feed when the start but-

inch up button is pressed perform

feed.

ton is pressed, the logic board

the Wire Drive Motor Test.

 

may be faulty.

 

2.

If the wire does NOT feed, when

 

 

the inch up button is pressed,

 

 

check light 1E on the power

 

 

board. It should go ON when the

 

 

inch up button is pressed. If light

 

 

1E does not go on when the inch

 

 

up button is pressed the control

 

 

board may be faulty.

 

3.

The power board may be faulty.

 

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 Function Problems, Wire 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.

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