Lincoln Electric SVM151-A Perform the Input Contactor, Coil Resistance and Supply, Voltage Test

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F-5					F-5
TROUBLESHOOTING & REPAIR
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 meters light, but the input con-	1. Make sure the input voltage			1.	Check leads 330 and 303A for
tactor does not activate when the	applied to the Multi-Weld 350 is				loose or faulty connections.
ON/OFF Mode Selector switch is	not greater than 113VDC.				See the Wiring Diagram.
turned on. The Multi-Weld 350				2.	Perform the Input Contactor
does not have output.
					Coil Resistance and Supply
					Voltage Test.
				3.	The Peripheral Board may be
					faulty.
				4.	The Weld Control Board may be
					faulty.
The Thermal Light is on. The Multi-	1. The output rating of the			1.	The Thermostat, located on the
Weld 350 does not have output.	machine	may be	exceeded.		input diode heat sink, may be
The fan operates normally.	See	the	Technical		faulty.
	Specifications.			2.	Check leads 306, 307, 206, 207
	2. Wait until the machine cools and				and plugs J22 and J11 for loose
	the Thermal Light goes out. The				or faulty connections. See the
	machineís output		should be		Wiring Diagram.
	restored.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the test/repairs safely, contact the Lincoln Electric Service Department for electrical troubleshooting assistance before you proceed. Call 1-800-833-9353.

MULTI-WELD 350