Lincoln Electric 225 manual TIG Welding Problems, Operation Section of this

E-6		TROUBLESHOOTING	E-6
	Observe all Safety Guidelines detailed throughout this manual
	PROBLEMS	POSSIBLE	RECOMMENDED
	(SYMPTOMS)	CAUSE	COURSE OF ACTION

TIG WELDING PROBLEMS

No high frequency. Machine is in the	1.	If the machine location is in a
TIG Mode and has normal output.		highly dirty environment with con-
		ductive contaminants, check and
		clean the spark gap with a low
		pressure air stream per the main-
		tenance instructions.
	2. Check spark gap operation and
	setting. Normal is (0.020"). Refer
	to Maintenance section of this
	report.
No gas flow when Amptrol is activat-	1.	Gas supply is empty or not turned
ed in the TIG Mode. Machine has		on.
output - fan runs. A “Click” can be	2.	Flow regulator may be set too
heard indicating that the gas sole-		low.
noid valve is operating.	3.	Gas hose may be pinched.
	4.	Gas flow may be blocked with
		dirt. Check filter screen inside gas
		inlet fitting to solenoid valve. Use
		filters to prevent reoccurrence.
	5.	Consult your local welder/gas dis-
		tributor.
When AC TIG welding, the arc is	1.	Tungsten electrode may be too
erratic and there is a loss of “clean-		small for process. Use a larger
ing” of the work piece.		diameter tungsten or a pure tung-
		sten.
	2.	If a helium blend is used as a
		shielding gas, then reduce the
		percentage of helium.
	1.	The welding current is too high
The end of the tungsten electrode		for the electrode type and/or size.
melts away.		See Electrode Amperage Ranges
		in the Operation Section of this
		manual.

If all recommended possible areas of misadjustment have been checked and the problem persists, Contact your local Lincoln Authorized Field Service Facility.

CAUTION

If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact your Local Lincoln Authorized Field Service Facility for technical troubleshooting assistance before you proceed.

PRECISION TIG 225