Lincoln Electric NA-5NF, NA-5SF service manual Function Problems, Wire Drive Motor Test

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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