Lincoln Electric SVM127-A service manual Perform Out of Voltage Range

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F-14		F-14
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE		Observe Safety Guidelines
	detailed in the beginning of this manual.
PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	FUNCTION PROBLEMS
The LN-9 shuts down while weld-	1. Make sure the power source	1. Perform Out of Voltage Range
ing. Upon retriggering, the gun the	and wire feeder polarity switch-	Shutdown Test.
unit will weld again for a period of	es are set correctly for the	2. The control cable may be faulty.
time.	process being used.
		Check or replace.
	2. Make certain the voltage control	3. The voltage PC board may be
	switch on the Lincoln CV power
		faulty. Replace.
	source is set in the "Remote"
	position.
	3. Make sure the #21 lead in the
	control cable has continuity to
	the work piece.
	4. Check the 1/8 amp fuse on the
	LN-9 voltage PC board.
	Replace if faulty.
	5. Be sure the welding power
	source is compatible with the
	LN-9 and operating properly.
	Make sure duty cycle of power
	source is not being exceeded.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, con- tact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-800-833-9353.

LN-9 Wire Feeder