Safety consideration for the XPR460
For this procedure, make sure that you use the pilot-arc relay, NOT the cooler-power relay. When at least
one remote on-off switch is set to OFF (disabled), 220 VAC electric power stays ON (active) to the input
side of the cooler-power relay.
1 Pilot-arc relay
2 Cooler-power relay
Corrective action
1. Remove the power from the cutting system.
2. Remove the control-side panel from the plasma power supply.
3. Examine the control PCB (PCB 1) in the plasma power supply.
4. Disconnect J6 from the control PCB.
5. Remove the cover from the pilot-arc relay.
6. Use an ohmmeter to measure the coil resistance across wire 21 and wire 22.
Diagnostics and Troubleshooting
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811530 Instruction Manual XPR460
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