Lincoln Electric NA-5NF, NA-5SF service manual Mode Function Problems

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

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F-15

TROUBLESHOOTING & REPAIR

F-15

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

COURSE OF ACTION

 

 

 

 

 

 

MODE FUNCTION PROBLEMS

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When the start button is pressed and 1.

Make sure the start option is in-

the unit is welding, the start mode is

stalled properly in the NA-5.

skipped.

 

2.

Make sure the start timer is set

 

for a time greater than zero sec-

 

onds.

3.

If the weld light goes ON as soon

 

as (but not before) the arc is

 

struck and the start timer is set

 

for a time greater than zero sec-

 

onds, the start timer board may

 

be faulty.

4.

If the weld light goes ON before

 

the arc is struck replace the start

 

option board with the jumper

 

plug. If the weld light continues

 

to go ON before the arc is struck

 

the logic board may be faulty.

 

Replace.

5.

With the jumper plug installed: If

 

the weld light does NOT go ON

 

until the arc is struck the start

 

option board may be faulty.

1.Check the lead harness between the start option boards and the procedure board for loose or faulty connections. See wiring diagram.

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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

Page 68
Image 68
Lincoln Electric NA-5NF, NA-5SF service manual Mode Function Problems