Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B Service Manual page 263

F-203
PRE-POWERUP SWITCH BOARD TEST PROCEDURE
FOR REPLACEMENT OF SWITCH ASSEMBLY G2402-2 (continued)
ARC START FOR PW450 ROBOTIC
1. Construct and connect an arc start circuit as
per Figure F.79.
2. Install leads and an arc start switch into plug
J103 pin 10 to pin 11 on the interface PC
board. Make sure the arc start switch leads
are long enough to reach outside of the
machine case.
J103
INTERFACE
BOARD
PRETEST MACHINE CONNECTIONS
1. Make sure the machine shunt connections
are tight.
2. Connect the Power Wave output terminals
to a grid load.
3. Turn the grid OFF.
PRETEST POWERUP
1. Turn on the pretest power switch.
Figure F.78. The Power Wave should beep
and display "SELECT A FUNCTION".
THERMOSTAT TEST
1. Check the thermostat LED (upper right
hand corner of the Power Wave Display
Panel) it should be OFF.
TROUBLESHOOTING & REPAIR
FIGURE F.79 - SHUNT CONNECTIONS
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
See
POWER WAVE 450
3. Leave plug J103 connected to the interface
board.
500
501
TO
542
J34
P83
543
INTERFACE
R
RECEPTACLE
U
B
539
541
544
545
ARC START
512
522
67
2. Remove one wire from the output diode
heat sink thermostat. The thermostat LED
should turn ON. See Wiring Diagram
3. Reconnect the wire to the output diode heat
sink thermostat. The thermostat LED
should turn back OFF.
4. Turn off the pretest power switch See
Figure F.78.
FET DRIVE TEST
Construct plug jumper as per Figure F80.
F-203
INSTALL LEADS
AND SWITCH
SWITCH