Lincoln Electric IM910 manual Your local Lincoln Authorized, Field Service Facility

E-3	TROUBLESHOOTING	E-3
	Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

The Wire Feed Speed Range is only	1. The 83% wire feed speed dual
50 - 374 in/min ( 1.3 - 9.5 m/min)		procedure is activated with the low
		speed gear. Check dual procedure
		switch in gun.
		DISPLAY PROBLEMS
"POS", "PRE" or "BRN" show on the	1.	The LN-15 is in the Press and
display.		Spin set-up mode.
	2.	One of the DIP switches on the
		feed head board is set to "ON" for
		timer setting mode.
	3.	Cycle power to the LN-15 or wait
		45 seconds.	If all recommended possible areas of
	4.	The LN-15 is an old ALPHA unit	misadjustment have been checked
		and a DIP switch is in the wrong	and the problem persists, Contact
		position.	your local Lincoln Authorized
The voltage display reads "0.0" volts	1.	The power source meter polarity	Field Service Facility.
during welding		switch is in the wrong position.
	2.	Set the power source meter polar-
		ity switch to match the welding
		process.
		WELDING PROBLEMS
Porosity in the weld.	1.	The part being welded is wet, dirty
Variable or "hunting" arc.		or rusty.
	2.	The electrode being used is wet,
		dirty or rusty.
	3.	There is insufficient shielding gas
		flow from possible cuts in the gas
		hose
	4.	There is moisture or water in the
		shielding gas line.
	5.	There is too much shielding gas
	6.	There is too much wind or drafts.	If all recommended possible areas of
	7.	The arc voltage is set too high.
			misadjustment have been checked
	8.	The wrong shielding gas is being
		used.	and the problem persists, Contact
			your local Lincoln Authorized
Variable or "hunting" arc.	1.	Worn and/or melted contact tip.
	2. Worn work cable or poor work		Field Service Facility.
		connection.
	3.	Loose electrode connection.
	4.	Wrong electrode polarity for the
		process being used.
The arc burns back to the tip.	1.	The spool of electrode is tangled.
	2.	The electrode and work leads are reversed
		(welding with the wrong polarity.)
	3.	The liner is clogged.
	4.	The contact tip is worn.
	5.	The wire drive tension is improp-
		erly set.

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.

LN-15 CONTROL CABLE MODEL (CE)