Lincoln Electric SVM127-A service manual Troubleshooting & Repair

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

Return to Master TOC

F-7			F-7
TROUBLESHOOTING & REPAIR
TROUBLESHOOTING GUIDE			Observe Safety Guidelines
	detailed in the beginning of this manual.
PROBLEMS	POSSIBLE AREAS OF	RECOMMENDED
(SYMPTOMS)	MISADJUSTMENT(S)	COURSE OF ACTION
	FUNCTION PROBLEMS
The wire feeds when the gun trig-	1. Make sure the inch switch is in	1.	The 1CR relay, located on the
ger is activated, but there is no arc	a "Wire Hot" position.		power PC board, may be faulty.
voltage.	2. Check the welding cables for		Check or replace.
	loose or faulty connections.	2. If a burnback kit is installed,
	3. Put a jumper wire from #2 to #4		remove and install jumper plug.
			If the problem is solved, the
	on the power source terminal
			burnback kit is faulty.
	strip. (Machines with 14 pin
	amphenols: pin C to pin D.) If	3.	Check the #2 and #4 leads in
	the arc voltage is not present at		the LN-9 wiring harness for
	the output terminals, the power		loose or faulty connections.
	source is faulty. If the arc volt-		See the Wiring Diagram.
	age IS present, the problem is
	in the wire feeder or control
	cable.
	4. Check the continuity of leads #2
	and #4 through the control
	cable. Replace if "open."

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 for electrical troubleshooting assistance before you proceed. Call 216- 383-2531 or 1-800-833-9353.

LN-9 Wire Feeder