Hypertherm XPR300 - Page 344

Diagnostics and Troubleshooting
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344 809480 Instruction Manual XPR300
4. Locate the pilot arc relay (CR 1) and remove the dust cover .
5. Have a second person close (push in) the contact on the pilot arc relay.
6. Measure the ohms between the nozzle and the workpiece. Less than 3 ohms is good. A value
greater than 3 ohms indicates a faulty connection between the torch and ignition console, or
between the ignition console and the power supply, or between the power supply work lead and
workpiece.
4
5
5
6
(+)
21
(-)
22