Lincoln Electric 10372 Service Manual page 80

F-16
POWER FEED
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
The displays are blank (not lit). The
wire feeds when the gun trigger is
activated.
The dual procedure is not func-
tional when using the remote Dual
Prodedure switch. The STATUS
LEDs are steady green on the
power source, Control Box and
wire drive units.
If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric
Service Department for technical troubleshooting assistance before you proceed. Call 216-383-2531 or 1-888-935-3877.
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TROUBLESHOOTING ND REP IR
POSSIBLE
MIS DJUSTMENT(S)
FUNCTION PROBLEMS (Continued)
1. Check for loose or faulty con-
nections at plug J1 on the dis-
play board, to plug J4 on the
Control Box control board.
1. Make certain the the bat switch
on the Dual Procedure Panel is
in the middle position. This
enables the gun remote dual
procedure switch.
C UTION
POWER W VE 455/POWER FEED 10
RE S OF RECOMMENDED
COURSE OF
1. Check for 12 VDC at plug J1 pin
7 (lead #512+) to plug J1 pin 8
(lead #500-) on the display
board. If the 12 VDC is present,
then the display board may be
faulty.
2. If the 12 VDC is low or not pre-
sent, check for loose or faulty
connections on leads #512 and
#500.
3. The Control Box control board
may be faulty.
1. The remote Dual Procedure
switch may be faulty. Check
switch and associated leads.
2. The local dual procedure switch
may be faulty.
Remove power to the machine.
Disconnect plug J5 from the
Control Box control board.
Check for continuity (less than
one ohm) between pins 1 and 7
when the Dual Procedure
switch is in position "A". Next
check for continuity (less than
one ohm) between pins 1 and 8
when the Dual Procedure
switch is in the "B" position. If
either of these continuity tests
fail, replace the switch. When
the switch is in the center pos-
tion there should not be any
continuity between pins.
3. The Control Box control board
may be faulty.
F-16
CTION