Hypertherm XPR300 User Manual

Diagnostics and Troubleshooting
8
326 809480 Instruction Manual XPR300
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Refer to the instruction manual that came with your CNC for
troubleshooting recommendations.
7. If LED D50 is illuminated:
a. Remove the power from the cutting system. Refer to Remove the power from the cutting
system on page 240.
b. Remove the connector from J14 on the rear of the plasma power supply.
c. Supply power to the cutting system.
d. Examine the LED D50 on PCB 1. Look for illumination.
8. If LED D50 is illuminated (when the discrete cable remains disconnected), examine the PCB for
dust or other contaminants. Use compressed air to remove any dust, debris, or obstruction if
found.
9. If LED D50 is still illuminated after the wire is removed, there is a problem with the board.
Contact your cutting machine supplier.
10. If the LED is not illuminated, skip to step 12.
11 . If the code stops and LED D50 is not illuminated with the discrete cable still disconnected,
examine the discrete cable for damage. Look for:
 Shorts across the line
 Damaged cable
 Bad relays
 Loose connections

Replace the discrete cable if you find damage. Refer to Discrete CNC
interface cable on page 397 in Parts List.
12. If you do not find visible damage to the discrete cable, remove the discrete cable from PCB 1.
Look for an open circuit between pins 3 and 4 of J14.
13. If the cable is good, make sure that the CNC output is set to OFF.
14. If there is a short circuit, make sure that the discrete cable is not shorted and that the CNC start
signal output is set to OFF.

A closed circuit can indicate that the CNC sent a plasma-start signal or
damage on the discrete cable.
15. If you cannot find or resolve the issue with these corrective actions, contact your cutting
machine supplier or regional Hypertherm Technical Service team.

Hypertherm XPR300 Specifications

General

Brand	Hypertherm
Model	XPR300
Category	Welding System
Language	English