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

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

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F-23

TROUBLESHOOTING & REPAIR

F-23

 

Observe all Safety Guidelines detailed throughout this manual

 

 

 

 

 

 

 

 

 

PROBLEMS

 

POSSIBLE AREAS OF

 

RECOMMENDED

 

 

(SYMPTOMS)

 

MISADJUSTMENTS(S)

 

COURSE OF ACTION

 

 

 

 

 

 

 

TRAVEL FUNCTION PROBLEMS

 

 

 

 

 

The travel will not function with the 1.

Make sure the jumper leads #691 1.

If light 7H, located on the logic

travel switch in the “Auto” postion.

and #692 are connected properly

board, does light when the auto-

The travel operates correctly with the

to the correct pins on the logic

matic travel is active check the

travel switch in the “Hand” position.

board. See wiring diagram.

CR2 relay. Normal coil resis-

 

 

 

 

 

tance is 10,000 ohms. The con-

 

2.

Check the travel switch (S2) and

tacts (terminals 2 and 4) should

 

 

 

associated leads for loose or

“close” when 110VDC is applied

 

 

 

faulty connections. See wiring

to the relay coil (terminals 1 +

 

 

 

diagram.

and 3 -).

 

 

 

3. Check light 7H located on the

 

 

 

 

 

logic board. This light should be

 

 

 

 

 

ON when the “Auto” travel is

 

 

 

 

 

active. If light 7H does not light

 

 

 

 

 

the logic board may be faulty.

 

 

The travel runs continuously when 1.

Make sure the jumper leads #691

1.

The 2CR relay may be faulty.

the travel switch is in the “Auto” posi

and #692 are connected properly

 

The contacts (terminals 2 and 4)

tion.

to the correct pins on the logic

 

may be stuck closed.

 

board. See wiring diagram.

 

 

 

 

2.

Check the associated leads for

2.

Check light 7H on the logic board.

 

misconnections. See wiring dia-

 

If light 7H is always ON the logic

 

gram.

 

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

Page 76
Image 76
Lincoln Electric NA-5NF, NA-5SF service manual Troubleshooting & Repair