appendix 1 - Victor Technologies
appendix 1 - Victor Technologies
appendix 1 - Victor Technologies
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a. Check continuity per appropriate Torch Instruction<br />
Manual<br />
5. Faulty torch<br />
a. Check continuity per appropriate Torch Instruction<br />
Manual<br />
6. Faulty connection of wire #15 or #17 to Pilot Output<br />
PC Board or pilot inductor wires reversed with wire<br />
#17.<br />
a. Check wiring connection<br />
7. Faulty Pilot Output PC Board<br />
a. D5 on the Pilot PC Board should turn on two<br />
seconds after the torch switch is closed.<br />
If D5 does turn on, install a jumper between<br />
E22 and E8 on the Pilot PC Board. If unit<br />
will pilot with jumper installed, replace the<br />
Output PC Board.<br />
If D5 does not turn on, measure the 12 vdc<br />
to drop to less than 2 vdc between J13-18<br />
& J13-17 two seconds after torch switch is<br />
closed. If voltage does drop, then measure<br />
for 36 VAC between J13-14 & J13-15. If<br />
36VAC is found then replace the Pilot/Output<br />
PC Board.<br />
8. Faulty Logic PC Board<br />
a. If the voltage between J13-18 & J13-17 on the<br />
Pilot/Output PC Board does not drop to less<br />
than 2 vdc two seconds after the torch switch<br />
is pressed, replace the Logic PC Board.<br />
4.09 Main Cutting Arc Problems<br />
NOTE<br />
Refer to the Appendix Pages for PC Board Layouts.<br />
Locate your symptom below:<br />
A. Main cutting arc will not initiate<br />
1. Work cable not connected.<br />
a. Connect work cable.<br />
2. Faulty INR Inrush Contactor<br />
a. While attempting to transfer, measure for 0vdc<br />
at input PC Board between E1 and E8.<br />
If the voltage is correct, then replace the<br />
INR Inrush Contactor.<br />
If voltage is not 0vdc then measure for<br />
120VAC at INR inrush contactor coil wires<br />
#68 and #69.<br />
3. Faulty Logic PC Board<br />
a. If 120VAC is not found at INR Inrush Contactor<br />
wires #68 and #69, measure for 120VAC at the<br />
Logic PC Board between J2-4 to J4-8.<br />
If 120VAC is not present, replace the Logic<br />
PC Board.<br />
If 120VAC is present, check wiring.<br />
4. Faulty Current Sensor PC Board<br />
Check the following:<br />
a. While trying to initiate main cutting arc, measure<br />
the voltage at J99-6 to J99-7 (or TP 10 to<br />
Gnd) indicators inside the Power Supply.<br />
If voltage is approximately 12 vdc replace<br />
the Current Sensor.<br />
If voltage is less than 2 vdc replace the<br />
Logic PC Board.<br />
5. Faulty Transfer Mod Enable Signal<br />
a. Test this Signal by measuring J4-6 to J4-8.<br />
If voltage approximately 12 vdc, replace<br />
Logic Board<br />
If 0vdc, replace Gate Drive Board<br />
Manual 0-2697 4-11 SERVICE
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