Lincoln Electric SVM 117-A service manual Main Transformer

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F-3	TROUBLESHOOTING & REPAIR								F-3
TROUBLESHOOTING GUIDE - Observe all Safety Guidelines detailed throughout this manual
PROBLEMS			POSSIBLE AREAS OF					RECOMMENDED
(SYMPTOMS)			MISADJUSTMENTS(S)					COURSE OF ACTION
			OUTPUT PROBLEMS
Major Physical or Electrical Damage		1.	Contact	your	local Lincoln		1.	Contact	The Lincoln Electric
is Evident			Electric	Authorized		Field		Service Dept. (216) 383-2531 or
			Service Facility.					1-800-833-9353 (WELD)
Machine is dead- No Open Circuit		1.	Make certain that the input				1. Check input power switch (S1).
Voltage output and No Wire Feed			power switch is in the "ON" posi-					It may be faulty.
when gun trigger is pulled.			tion.
							2. Check for lose or broken wires
		2. Check the input voltage at the						at the reconnect panel.
			machine.	Input	voltage	must
			match the rating plate and the				3.	Perform	Main Transformer
			reconnect panel.					Test.
		3.	Blown or missing fuses in the				4. Check		the thermostats and
			input line.					associated leads for loose or
								broken connections. See wiring
		4.	The thermostats may be open					diagram.
			due to machine overheating. If
			machine operates normally after				5. The control board may be faulty.
			a cooling off period then check					Replace.
			for proper fan operation and
			ventilation. Make certain that
			the machine's duty cycle is not
			being exceeded.
		5. Check the trigger circuit. Leads
			#324 to #325 should have conti-
			nuity (zero ohms) when the gun
			trigger is pulled. If not then the
			gun may be faulty - replace.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, con- tact the Lincoln Electric Service Department for technical troubleshooting assistance before you proceed call 216- 383-2531 or 1-800-833-9353

WIRE-MATIC 250