Lincoln Electric SVM162-B See Note below, Protection Board, Perform the T1 Transformer

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F-7		TROUBLESHOOTING & REPAIR						F-7
	TROUBLESHOOTING GUIDE					Observe Safety Guidelines
			detailed in the beginning of this manual.
	PROBLEMS		POSSIBLE AREAS OF	RECOMMENDED
	(SYMPTOMS)		MISADJUSTMENT(S)	COURSE OF ACTION
			OUTPUT PROBLEMS
	The machine does not have welding		1. Check the electrode cable and	1. Check the Stick/TIG switch and
	output in the Stick mode.	The	holder for loose or faulty connec-		associated leads. See the Wiring
	machine operates correctly in the		tions.		Diagram.
	TIG mode.		2. Make sure the Stick/TIG switch is	2. The control board may be faulty.
	SEE NOTE BELOW		in the proper position and operat-
			ing correctly.
	The machine has welding output in		1. Make sure the Stick/TIG switch	1.	Check the remote control recep-
	the Stick mode but no output in the		is in the proper position and		tacle and associated wiring. See
	TIG mode. ( no gas flow or high fre-		operating correctly.	2.	the Wiring Diagram.
	quency).		2. The remote control device may		Perform the		Protection Board
	SEE NOTE BELOW		be faulty.	3.	Test.
					Check the J11 plug on the con-
					trol board. See the Wiring
					Diagram.
				4. The control board may be faulty.
	The machine welds at a very low		1. If welding in the TIG mode, the	1.	Check the polarity switch and
	output regardless of the current		remote control device may be	2.	associated leads.
	control setting.		defective.		Check the interior connections of
	NOTE: BEFORE REPLACING A		2. Make certain the input line volt-	3.	the heavy current carrying leads.
			age is correct for the machineʼs		Perform the		SCR Bridge Test.
	CONTROL BOARD		reconnect configuration.	4.	Perform the T1 Transformer
	If an Advanced Control Panel is		3. Check the welding cables and/		Test.
	installed, remove it and replace		or torch for loose or faulty con-	5.	Check the output current con-
	the Jumper in connector J-3. If		nections.
	the machine functions normally,				trols for		proper	operation.
	the Advanced Process panel or				Normal resistance			is 10,000
	harness is defective.			6.	ohms. See the Wiring Diagram.
					The control board may be faulty.

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 1-888-935-3877.

PRECISION TIG 275