Lincoln Electric 7FH manual Dual Procedure is not Gun has not been selected at, Communications

PROBLEMS

PROBLEM	POSSIBLE CAUSE	WHAT TO DO
18. Dual Procedure is not	a. Gun has not been selected at the	a. Set dual procedure switch at control
functioning when using the	control box.	box to the gun position. Refer to
remote dual procedure switch.		operating instructions.
	b. Faulty Remote Dual Procedure	b. Remove switch. Check continuity
	Switch.	between switch pins with switch closed
		and no continuity with switch open. If it
		fails a continuity test, repair or replace
		switch.
	c. Faulty Local Dual Procedure	c. Refer to Problem 19, Local Dual
	Switch.	Procedure Switch.
	d. Defective Control Box to Wire	d. With switch installed disconnect J2 plug
	Feed Unit cable, associated	from control board. Check continuity
	harness wiring, or control board.	between P2 pins 4 and 6 with the
		remote switch closed, and no continuity
		with the remote switch open. If a
		continuity test fails, replace or repair the
		damaged harness or cable. Otherwise
		replace control board. (See procedure
		for replacing PC boards).
	e. Problems with serial	e. Make sure input cable connections are
	communications.	tight. Make sure parameters on Power
		Source display, such as WFS match
		those on wire feeder display, if not, try
		changing Synergic 7F control board. If
		problem persists, refer to Power Source
		Troubleshooting information. (See
		procedure for replacing PC boards).
19. Dual Procedure is not	a. Faulty Local Dual Procedure	a. Disconnect harness plug from J2 on the
functioning when using the	Switch or control board.	control board. Check that there is
local dual procedure switch.		continuity between plug pins 7 and 11
		when local DPS is in position “A” but not
		when in “Gun” or “B”. Now check that
		there is continuity between plug pins 11
		and 12 when local DPS is in position “B”
		but not when in “Gun” or “A”. If any of
		these continuity tests fail repair or replace
		switch or switch harness to correct the
		problem, Otherwise, replace control
		board. (See procedure for replacing PC
		boards).
	e. Problems with serial	b. Make sure input cable connections are
	communications.	tight. Make sure parameters on Power
		Source display, such as WFS match those
		on wire feeder display, if not, try changing
		Synergic 7F control board. If problem
		persists, refer to Power Source
		Troubleshooting information. (See
		procedure for replacing PC boards).

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