Lincoln Electric SVM158-A service manual Troubleshooting & Repair

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F-12		TROUBLESHOOTING & REPAIR		F-12
	FAULT CODES	DESCRIPTION/	CORRECTIVE	SERVICE FACILITY
		DEFINITION	ACTION	CORRECTIVE
				ACTION
39		Electrical "glitch" on the	Possibly caused by an	Perform the Main Switch
		primary over current fault	external electrical	Board Test.
		detector circuit.	"noise" or signal level.	Perform the Power
			Make sure the V350-Pro
			is grounded correctly.	Board Test.
			The machine is self	There may be a problem
			clearing when
			condition ceases.	with the primary current
				sensors (CT) located on
				the main switch board.
				See the wiring diagram.
				The control board may
				be faulty.

43	Capacitor banks "A"	Make sure the recon-	There may be a problem
	(lower) and "B"(upper)	nect switches are con-	with the V/F signals from
	are not balanced.	figured for the input	the main switch board to
		voltage being applied to	the control board.
		the machine. The	Perform the Main Switch
		machine is self-clearing
		when	Board Test.
		condition ceases.	The capacitor(s) may be
			faulty. Check and
			replace if necessary.

44	The machine has	Make sure the V350-Pro	Perform the Power
	detected a fault in the	is grounded correctly.	Board Test.
	central processing unit	The machine is self	The control board or
	(CPU).	clearing when
		condition ceases.	associated wiring may be
			faulty. See the wiring
			diagram.

NOTE: If more than one fault message is being displayed, perform all the checks for the faults

before replacing the printed circuit board

V350-PRO