Lincoln Electric SVM127-A Problems Possible Areas, Symptoms Misadjustments Course of Action

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F-22					F-22
	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
		STARTING PROBLEMS
	The arc voltage appears to rise too	1. Check the welding cables for			1. If a start board is used in the
	slowly or stubs or blasts at the start	loose or faulty connections.			LN-9, change the jumper to
	of a weld. Once started the weld-	2. Adjust the "start" trimmer on the			position "A." If the problem is
	ing is good.				solved, the start board may be
		voltage PC board. It should be
					faulty. Replace.
	NOTE: Pulse Power 500 operation	slightly higher than the weld
	with a filter kit may exhibit these	voltage. See Starting Charac-			2. The voltage PC board may be
	symptoms.	teristics in the Operation section			faulty. Replace.
		of this manual.
		3. Put the Lincoln power source in
		the "Machine	Control"	mode.
		Jumper the "BYPASS" pins on
		the LN-9 voltage PC board.
		Adjust the weld voltage from the
		power source for the process
		being used. If the symptoms
		persist, the power source may
		be faulty.
		4. Check for correct control cable
		connections	to the	power
		source.

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