Lincoln Electric IM539 Synergic 7F and 7FH - Manual (Page 34)

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PROBLEM
18. Dual Procedure is not
functioning when using the
remote dual procedure switch.
19. Dual Procedure is not
functioning when using the
local dual procedure switch.
POSSIBLE CAUSE
a. Gun has not been selected at the
control box.
b. Faulty Remote Dual Procedure
Switch.
c. Faulty Local Dual Procedure
Switch.
d. Defective Control Box to Wire
Feed Unit cable, associated
harness wiring, or control board.
e. Problems with serial
communications.
a. Faulty Local Dual Procedure
Switch or control board.
e. Problems with serial
communications.
WHAT TO DO
a. Set dual procedure switch at control
box to the gun position. Refer to
operating instructions.
b. Remove switch. Check continuity
between switch pins with switch closed
and no continuity with switch open. If it
fails a continuity test, repair or replace
switch.
c. Refer to Problem 19, Local Dual
Procedure Switch.
d. With switch installed disconnect J2 plug
from control board. Check continuity
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. Make sure input cable connections are
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).
a. Disconnect harness plug from J2 on the
control board. Check that there is
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).
b. Make sure input cable connections are
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).
PROBLEMS