Lincoln Electric SVM107-B service manual Troubleshooting Guide

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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
	OUTPUT PROBLEMS
No DC welding output. AC welding	1. Make sure the Polarity Switch is	1. Perform the Output Bridge Test.
output and auxiliary power is nor-	in the proper position and is	2.	Check the Choke (L1),	the
mal.	“seated” correctly.
			Polarity Switch (S2) and associ-
	2. Make sure the electrode and		ated wires for loose or faulty
	polarity are correct for the		connections. Check the choke
	process being used.		winding for continuity and test
			to be sure it is NOT grounded
			the choke iron.
No AC welding output. DC welding	1. Make sure the Polarity Switch is	1. Check the operation of		the
output and auxiliary power is nor-	in the proper position and is		Polarity Switch (S2). Also check
mal.	“seated” correctly.		the associated wires for loose
	2. Make sure the electrode is cor-		or faulty connections.	See
			Wiring Diagram.
	rect for the process being used.
	3. Make sure the welding cables	2.	Check for continuity from lead
			“S2” to lead “E” located in the
	are not coiled or too long.
			main stator. See Wiring Dia-
			gram.

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).

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