Lincoln Electric SVM158-A Refer to the Operation Section, Voltage, Current Calibration Procedure

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F-8				F-8
	TROUBLESHOOTING & REPAIR
	Observe Safety Guidelines			TROUBLESHOOTING GUIDE
	detailed in the beginning of this manual.
	PROBLEMS	POSSIBLE AREAS OF		RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENT(S)		COURSE OF ACTION
			FUNCTION PROBLEMS
	The display is not functioning prop-	1.	Refer to the Operation Section	1. Check for loose or faulty plug
	erly.		of this manual for normal opera-	connections between the
			tion characteristics.	Display board and the control
				board. See the wiring diagram.
		2.	Check for proper current and	2. The display board may be faulty.
			voltage calibration.
				3. The control board may be faulty.

A fault or error code is displayed.	1. See	the	Fault	Code 1. See Fault Code Explanations.
	Explanations.

For no apparent reason the welding 1.	Check the welding cables for	1.	Perform	the	Voltage and
characteristics have change.	loose or faulty connection.		Current		Calibration
			Procedure.
2.	Make sure the machine’s mode
	and output are set correctly for	2.	Perform		the	Current
	the process being used. (CV,		Transducer Test.
	CC,TIG etc.)
		3.	Perform	the	Output	Diode
3.	If Mig welding make sure the		Module Test
	shielding gas and wire speed are
	correct for the process being	4.	The control board may be faulty.
	used.
4.	Check for proper current and	5.	The advanced process panel (If
	voltage calibration.		used) 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 1-800-833-9353(WELD).

V350-PRO