Lincoln Electric SVM127-A service manual Welding Problems

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F-16			F-16
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
		WELDING PROBLEMS
The welding arc is variable or	1.	Make sure the welding parame-	1. Put the power source in
"hunting."		ters are correct for the welding	"Machine Control" for voltage,
		procedure being used.	and check if welding perfor-
	2.	Check the welding cables for	mance improves. If the problem
			is resolved, check or replace the
		loose or faulty connections.
			control cable. Or, the LN-9 volt-
	3.	The gun cable may be faulty.	age PC board may be faulty.
		Check or replace.	2. Perform the Wire Drive Motor
	4.	Check cable liner for proper	Test.
		size.
	5.	The gun contact tip may be
		worn. Check or replace.
	6.	The welding power supply may
		be faulty. Check or replace.

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