Lincoln Electric SVM185-A service manual Make certain the Power Wave, Power source is functioning

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F-8	TROUBLESHOOTING AND REPAIR			F-8
Observe Safety Guidelines detailed in the beginning of this manual.
PROBLEMS		POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)		MISADJUSTMENT(S)	COURSE OF ACTION
		FUNCTION PROBLEMS
Major physical or electrical damage		1. Contact your local authorized	1. Contact the Lincoln Electric
is evident when the sheet metal		Lincoln Electric Field Service	Service Department, 1-888-
cover(s) are removed.		Facility for assistance.	935-3877.
No wire feed, solenoid or arc volt-		1. The gun trigger may be faulty.	1. Check the continuity of leads
age. The STATUS LED’s are		Check or replace.	from the gun trigger receptacle
steady green.			to plug J85.	See wire drive
		2. Check panel connections and	wiring diagram.
		switch(s) for proper operation.
			2. The wire drive feedhead board
			may be faulty.
No control of wire feed speed. All		1. Check P9 plug and set at feed-	1. Perform the Tach Feedback
			Test.
STATUS LEDs are steady green.		head control.
The preset wire feed speed is			2. The wire drive feedhead board
adjustable on the front panel.
			may be faulty.
No welding arc voltage when the		1. The Power source may unable to	1. Make certain the Power Wave
gun trigger is activated. The wire		produce welding output due to a	power source is functioning
feeds normally and the gas sole-		thermal fault or other malfunction.	correctly. (Green Status LED)
noid functions properly. The STA-		Check STATUS LED on Power	2. Check weld + work cable rout-
TUS LEDs are steady green on the		Source. See PowerWave®
wire drive unit.		Troubleshooting.	ing.
The wire feed speed does not		1. The run in and weld wire feed	1. Perform the Current Transducer
change when welding current is		speeds may be set to the same	Test in POWERWAVE® service
established. The WFS stays at		value. Set run in speed to a	manual.
the run-in speed. The STATUS		value that gives best starting
LEDs are steady green.		results.	2. If the run in wire feed speed can-
			not be adjusted, perform the
			Tach Feedback Test and also
			the Drive Motor Test.
			3. The wire drive feedhead board
			may be faulty.

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