Lincoln Electric SVM185-A service manual Power

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F-7	TROUBLESHOOTING AND REPAIR						F-7
Observe Safety Guidelines detailed in the beginning of this manual.
	PROBLEMS	POSSIBLE AREAS OF		RECOMMENDED
	(SYMPTOMS)	MISADJUSTMENT(S)		COURSE OF ACTION
		OUTPUT PROBLEMS
Variable or "hunting" arc.		1. Wrong size, worn and/or melted		1. Replace the contact tip.
		contact tip.		2. Verify all	work and		electrode
		2. Worn work cable or poor work		connections are tight and that
		connection.		the cables are in good condition.
		3. Wrong polarity.		Clean/replace as necessary.
		4. The gas nozzle is	extended	3. Adjust polarity		to the recom-
		beyond the contact tip or the wire		mended procedure.
		stickout is too long.		4. Adjust the gas nozzle and short-
		5. Poor gas shielding on processes		en the stickout to 3/8 to 1/2 inch-
		requiring gas.		es.
				5. Check gas flow and			mixture.
				Remove or block sources of
				drafts.
Poor arc starts with sticking or		1. Improper procedures	or tech-	1. See "Gas Metal Arc			Welding
"blast-offs", weld porosity, narrow		niques.		Guide" (GS-100).
and ropy looking bead.
The wire	feed speed/amperage	1. The software in the	POWER	1. Contact	the	local	authorized
and voltage/trim display work dur-		FEED® 25M must be upgraded.		Lincoln Field Service Shop.
ing preset but show nothing during				2. Download	update from power-
welding.				wavesoftware.com
Can only select mode 12 or other
(Factory Reset) setting - or unit
returns to the factory setting

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed. Call 1-888-935-3877.

POWER FEED® 25M