Lincoln Electric SVM172-A service manual Problems Possible

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F-14		TROUBLESHOOTING & REPAIR				F-14
	Observe all Safety Guidelines detailed throughout this manual
	PROBLEMS			POSSIBLE	RECOMMENDED
	(SYMPTOMS)			CAUSE	COURSE OF ACTION
	OUTPUT		PROBLEMS		1. Check for 40VDC at J81 leads
	The feeder doesn’t power up - no		1. The Power Feed 10M Single Wire		#540 and #500. If voltage is present,
	display, no cold feed.			Feeder power switch is OFF. Turn	replace P.C. BD. If voltage not pre-
				the Power Feed 10M Single Wire	sent, check leads from J81 on BD. to
				Feeder power switch ON.	Input 5 pin connector.	Refer to
					machine schematic.
			2.	The Power Wave power source is
				OFF. Turn ON the Power Wave
				power source.
			3.	The circuit breaker for the wire
				feeder on power source have
				tripped. Reset the circuit break-
				ers.
			4.	The control cable may be loose or
				damaged. Tighten, repair or
				replace the control cable.
			5.	The power switch is damaged.
				Replace the power switch.
					1. Check for 6.5VDC with trigger
	No shielding gas.		1.	The gas supply is OFF or empty.
				Verify the gas supply is ON and	pulled at J83 leads #553 and #554. If
				flowing.	voltage is present replace solenoid.
					If voltage is not present replace P.C.
			2.	The gas hose is cut or crushed.	BD. Refer to machine schematic.
				Route the gas hose so it avoids
				sharp corners and make sure
				nothing is on top of it. Repair or
				replace damaged hoses.
			3.	Dirt or debris is in the solenoid.
				Apply filtered shop at 80psi to the
				solenoid to remove dirt.
			4.	There is a loose solenoid connec-
				tion. Remove the cover and check
				that all connections are in good
				condition.
			5. The solenoid has failed.

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 at 1-888-935-3877 for electrical troubleshooting assistance before you proceed.

POWER FEED 10M SINGLE/DUAL