Lincoln Electric SVM172-A service manual Make certain the Power Wave, 455M power source is func

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F-4 TROUBLESHOOTING & REPAIR F-4

POWER FEED 10M

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, 1-888-935-
	cover(s) are removed.	Facility for assistance.		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. Make certain the Control Box is		wiring diagram.
		configured for a wire feeding
		mode.	2.	The wire drive feedhead board
				may be faulty.
		3. Check option panel connections
		and switch(s) for proper opera-	3.	The Control Box control board
		tion.
No control of wire feed speed. All		1. Check for a mechanical restric-	1.	Perform the Tach Feedback
STATUS LEDs are steady green.		tion in the wire feed path.		Test.
The preset wire feed speed is
adjustable on the Control Box.			2.	The wire drive feedhead board
				may be faulty.
	No welding arc voltage when the	1. The Power source may unable	1.	Make certain the Power Wave
gun trigger is activated. The wire		to produce welding output due to		455M power source is func-
feeds normally and the gas sole-		a thermal fault or other malfunc-		tioning correctly.
noid functions properly. The STA-		tion. Check STATUS LED on
TUS LEDs are steady green on the		Power Wave 455 machine. See	2.	The wire drive feedhead board
wire drive unit and the Control Box.		Power Wave 455		may be faulty.
		Troubleshooting.
			3.	The Control Box control board
				may be faulty.
The wire feed speed does not		1. The run in and weld wire feed	1.	Perform the Current
change when welding current is		speeds may be set to the same		Transducer Test. In Power
established. The WFS stays at the		value. Set run in speed to a		Wave 455 service manual.
run-in speed. The STATUS LEDs		value that gives best starting
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 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