Troubleshooting & repair – Lincoln Electric INVERTEC POWER WAVE 450 SVM112-B User Manual

Page 263

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.

3. Leave plug J103 connected to the interface

board.

TROUBLESHOOTING & REPAIR

F-203

POWER WAVE 450

PRE-POWERUP SWITCH BOARD TEST PROCEDURE

FOR REPLACEMENT OF SWITCH ASSEMBLY G2402-2 (continued)

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. See

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.

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.

FIGURE F.79 - SHUNT CONNECTIONS

500

501

542

543

539

541

544

545

512

522

J103

INTERFACE

BOARD

J34

P83

INTERFACE

RECEPTACLE

ARC START

SWITCH

INSTALL LEADS
AND SWITCH