Lincoln Electric IM557 Synergic 7 and 7H - Manual (Page 41)

E-8 TROUBLESHOOTING E-8
SYNERGIC 7 & 7H
Observe all Safety Guidelines detailed throughout this manual
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.
CAUTION
PROBLEMS
(SYMPTOMS)
POSSIBLE
CAUSE
RECOMMENDED
COURSE OF ACTION
17. Dual procedure is not functioning
when using the local dual proce-
dure switch.
18. Optional gun dual procedure
switch is not functioning properly.
a. Optional gun dual procedure
switch or remote control kit may
be connected.
b. Serial communication problem.
c. Faulty local dual procedure switch,
wiring harness, or Control board.
a. Local dual procedure switch is not in "Gun"
position, and/or remote control kit's dual
procedure switch is not in "Gun" position.
b. Faulty remote control kit.
c. Serial communication problem.
d. Faulty optional gun dual proce-
dure switch.
e. Faulty wiring harness or optional
gun dual procedure amphenol.
f. Faulty local dual procedure switch.
g. Faulty Control board.
a. When the dual procedure switch is in the “Gun”
position then either the remote or the optional gun
dual procedure switch must be used to select
between procedures “A” and “B”.
b. Make sure that parameters on power source dis-
play, such as WFS, match those on wire feeder
display. If not, refer to Problem 14.
c. Disconnect harness plug from J2 on Control
board. Check continuity between plug pins 1 and
12 when local dual procedure switch is in position
"A", but not when in "Gun" or "B". Now check con-
tinuity between plug pins 5 and 12 when local dual
procedure switch 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 cor-
rect problem. Otherwise, replace Control board.
(See procedure for replacing PC boards.)
a. Place local dual procedure switch in "Gun" posi-
tion and, if a remote control kit is attached, place
its dual procedure switch in "Gun" position also.
b. If a remote control kit is attached, remove it. If
this solves the problem, refer to Problem 19.
c. Make sure parameters on power source display,
such as WFS, match those on wire feeder display.
If not, refer to Problem 14.
d. Remove switch. Make sure there is continuity
between switch pins with switch closed, and no
continuity with switch open. If either of these tests
failed, repair or replace switch.
e. Remove optional gun dual procedure switch and
disconnect harness plug from J2 on Control
board. Check that there is continuity between pin
A of receptacle J17 and pin 13 of plug P2. Check
that there is continuity between pin C of recepta-
cle J17 and pin 4 of plug P2. Check no continuity
between pins A and C of receptacle J17. If any of
these continuity tests fail, repair or replace switch
amphenol J17 or switch harness.
f. Perform step c. of Problem 17.
g. Replace Control PC board. (See procedure for
replacing PC boards.)