Lincoln Electric IM557 Wire feed motor runs and solenoid Power source is defective, Sent, Present

E-5	TROUBLESHOOTING	E-5
	Observe all Safety Guidelines detailed throughout this manual

PROBLEMS

(SYMPTOMS)

POSSIBLE

CAUSE

RECOMMENDED

COURSE OF ACTION

9. Wire feed motor runs and solenoid		a. Power source is defective.	a. If arc voltage is present when wire feeder is
	turns on but no arc voltage pre-		connected to the other input receptacle (#1 or
	sent.		#2) of power source then power source is
			defective. Otherwise, select a stick procedure
			on power source, connect a known good input
			cable (see step b) to wire feeder #1 receptacle
			of power source, and jumper across sockets C
			and D of 8-socket input cable plug. If no arc
			voltage is present (refer to display on power
			source) then power source is defective.
		b. Input cable is defective.	b. Disconnect input cable from power source and
			wire feeder. Check continuity between socket
			C of 8-socket plug and pin C of 14-pin plug of
			the input cable, and between socket D of 8-
			socket plug and pin D of 14-pin plug of the
			input cable. Replace cable if no continuity.
		c. Wiring harness or Control PC	c. Check continuity between pin C of 8-pin recep-
		board is defective.	tacle and pin 7 of plug P1, and between pin D
			of 8-pin receptacle and pin 6 of plug P1. If no
			continuity then harness is faulty, otherwise
			replace Control PC board. (See procedure for
			replacing PC boards.)
10. Speed does not change when		a. Run-in and weld speeds are set	a. Set run-in and weld speeds to desired set-
	weld current flows.	to the same value or run-in is set	tings.
		to ---.
		b. Power Source may be defective	b. Make sure that parameters on power source
		or there may be a problem with	display, such as WFS, match those on wire
		the Serial communications.	feeder display. If not, refer to Problem 14.
			Otherwise, replace control PC board. (See
			procedure for replacing PC boards.)
11. Voltmeter does not function or		a. Electrode sensing lead or connec-	a. Check continuity from brass block on wire
	read properly when arc voltage is	tions may be intermittent.	feeder to pin F of 8-pin control cable recepta-
	present.		cle on wire feeder. If there is no continuity,
			repair faulty connection.
		b. Serial communication problem.	b. Make sure that parameters on power source
			display, such as WFS, match those on wire
			feeder display. If not, refer to Problem 14.
			Otherwise, replace Control PC board. (See
			procedure for replacing PC boards.)

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.

SYNERGIC 7 & 7H