Lincoln Electric 10372 Service Manual page 78

F-14
POWER FEED
Observe all Safety Guidelines detailed throughout this manual.
PROBLEMS
(SYMPTOMS)
The purge switch on the wire drive
unit does not activate the gas
solenoid, but gun trigger closure in
the MIG or Pulse modes does acit-
vate the solenoid. The LEDs are
steady green on the power source,
Control Box and wire drive unit.
The COLD INCH/GAS PURGE
switch does not turn on the wire
drive motor but gun trigger clo-
sure in the MIG or Pulse modes
does activate the wire drive motor.
The LEDs are steady green on the
power source, Control Box and
wire drive unit.
The voltmeter on the Control Box
does not function properly even
though the STATUS LEDS are
steady green.
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. Make certain
INCH/GAS PURGE switch is
operating properly.
2. Check for loose or faulty leads
between COLD INCH/GAS
PURGE switch and the wire
drive control board. See wiring
diagram.
1. Make certain
INCH/GAS PURGE switch is
operating properly.
2. Check for loose or faulty leads
between the COLD INCH/GAS
PURGE switch and the wire
drive control board. See wiring
diagram.
1. Make sure the DIP switches are
configured correctly for the
welding polarity being used.
See Setting DIP Switches in
the Wire
Installation section of this man-
ual.
2. Check the #67 lead on the wire
drive unit. Make sure it is con-
nected to the motor gear box
and also the voltage sense PC
board.
3. Check the work sensing leads
on the Power Wave 455 power
source. Check leads #202
(Neg. output terminal) and #206
(Pos. output terminal). See
Power Wave 455 wiring dia-
gram. If external voltage sens-
ing is utilized, check the #21
lead between the 4-pin recepta-
cle on the front of the Power
C UTION
POWER W VE 455/POWER FEED 10
RE S OF RECOMMENDED
COURSE OF
the COLD 1. If the COLD INCH/GAS PURGE
switch is operating correctly
and the associated leads are
OK, the wire drive control board
may be faulty.
the COLD 1. If the COLD INCH/GAS PURGE
switch is operating correctly
and the associated leads are
OK, the wire drive control board
may be faulty.
1. Check leads #512B and #511
from plug J4 on the wire drive
control board to the voltage
sense PC board.
Drive in the
2. Perform the Voltage Sense
Board Test.
3. The display board may be
faulty.
4. The wire drive control board
may be faulty.
5. The Control Box control board
may be faulty.
F-14
CTION