Lincoln Electric SVM132-A service manual Welding Problems

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F-9	TROUBLESHOOTING AND REPAIR				F-9
	Observe all Safety Guidelines detailed throughout 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” and check if
			procedure being used.	the welding performance
				improves. If the problem is
		2.	Check the welding cables for	resolved, check or replace the
			loose or faulty connections.	control cable and/or check the
				output control in the LN-8.
		3.	The gun cable may be faulty.
			Check or replace.	2. Perform the Drive Motor Test.
		4.	The gun contact tip may be
			worn. Check or replace.
		5.	The welding power supply may
			be faulty. Check or replace.
Poor arc striking with sticking or		1.	Make sure the welding parame-	1. Put the power source in
“blast offs”. The weld bead may			ters and techniques are correct	“Machine Control” and check if
also be ropey and display weld			for the welding procedure being	welding performance improves.
porosity.			used.	If the problem is resolved, check
				or replace the control cable
		2.	Check the welding cables for	and/or check the output control
			loose or faulty connections.	in the LN-8.
		3.	The gun cable may be faulty.
			Check or replace.
		4.	The gun contact tip may be
			worn. Check or replace.
		5.	The welding power source may
			be faulty. Check or replace.

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 1-800-833-9353.

LN-8