Lincoln Electric SVM162-B GAS Water Solenoid Test, Test Procedure, Disable Procedure

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F-32		TROUBLESHOOTING & REPAIR				F-32
		GAS (WATER) SOLENOID TEST (continued)
	TEST PROCEDURE				7. Activate the torch trigger and check for
1.		Remove input power to the Precision TIG
		275 machine.			approximately 115 VAC at the solenoid leads
2.		Remove the left case side.			(#231A and # 235). If the correct voltage is
					present, the solenoid should activate and
3.		Perform the High Frequency Circuit			gas should flow.
4.		Disable Procedure.			8. If voltage is present at leads #231A and
		Locate the gas solenoid in the torch connec-			#235 and the solenoid does not activate, the
		tion box.			solenoid may be defective. The solenoid
5.		Put the mode switch S3 in the 2-Step TIG			can be further checked by removing leads
					#231A and #235 from the solenoid and
		position.			applying the external isolated 115 VAC sup-
					ply to the solenoid terminals. If the solenoid
					activates with the external supply but not
		WARNING			when powered by the control board, the
					problem may be in the control board. If you
		ELECTRIC	SHOCK	CAN
					hear solenoid activation but there is still no
		KILL.			gas flow, check for restrictions in the line.
		*With input power ON, there			9. When the test is complete, replace leads
		are high voltages inside the
		machine. Do not reach into			#231A and #235.	previously
		the machine	or touch	any	10. Reassemble the two leads
		internal part.			removed in the High Frequency Circuit
					Disable Procedure.
					11. Reassemble the left case side.
6.		Apply the correct input power to the TIG 275.			12. If a water solenoid is used, it can be tested
					using the same procedures.

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PRECISION TIG 275