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

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F-33	TROUBLESHOOTING & REPAIR			F-33
	Observe all Safety Guidelines detailed throughout this manual
	PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENTS(S)	COURSE OF ACTION
		FUNCTION PROBLEMS
The flux or gas/water solenoid does 1.		Make sure the switch on the flux	1. If light 7G, located on the logic
not function (open).		hopper is in the ON position.	board, does light when the flux
			(gas/water) solenoid is normally
	2.	Check light 7G located on the	active, check the CR1 relay.
		logic board. This light should be	Normal coil resistance is 10,000
		on when the flux valve would nor-	ohms. The contacts (terminals 2
		mally be active. If light 7G does	and 4) should “close” when
		not light the logic board may be	110VDC is applied to the relay coil
		faulty.	(terminals 1 + and 3 -).
			2. Check the wiring harness for
			loose or faulty connections
			between the CR1 relay, the logic
			board, the TS2 terminal strip and
			the flux receptacle. See wiring
			diagram.

The flux or gas/water solenoid con- 1.	Check light 7G located on the	1. Check the CR1 relay. The con-
tinuously remains open.	logic board. This light should be	tacts (terminal 2 and 4) should
	lit only when the flux valve would	“close” only when 110VDC is
	normally be active. If light 7G is	applied to the relay coil. (termi-
	lit continuously the logic board	nals 1+ and 3-). If the contacts
	may be faulty.	are “closed” continuously replace
		the CR1 relay.
2.	Check to make sure the solenoid
	is not stuck in the open position.

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