Hypertherm XPR460 - Troubleshooting for an Ignition Timeout; Diagnostic Code 520; Symptoms; Corrective Action

6. If each green LED is illuminated, examine each chopper control PCB:
a. Make sure that the D3 LED and D4 LED are flashing one time per second.
A flashing LED shows that the microprocessor on the PCB is functional.
b. Make sure that Dual Inline Package (DIP) switches 1 – 4 on S2 are in the OFF position.
c. Make sure that the CAN cable connector is fully engaged in J7.
d. If an LED is not operating correctly, speak to your cutting machine supplier or regional
Hypertherm Technical Service team.
7. Make sure that the D33 LED and D34 LED are flickering.
A flickering LED shows that communications on the CAN cable is functional.
8. If you cannot find or correct the problem, speak to your cutting machine supplier or regional
Hypertherm Technical Service team.
Troubleshooting for an ignition timeout
Diagnostic code 520
A 520 diagnostic code is an alert that shows after an ignition timeout when there is no pilot arc.
Symptoms
Code Symptoms XPR models XPR action Code cancels with...
520 The sensor in Chopper 1 does not measure current
during the 600 millisecond ignite period because no
current path completes between the nozzle and the
electrode.
All models End of cycle • Start process
• Set process
• Remote on-off
Corrective action
1. Make sure that the transfer height is correct and that the torch is not in contact with the workpiece.
2. Examine the consumables, and replace any that have damage or excess wear.
3. Make sure that the spark gap PCB is correctly connected to the ignition PCB.
Refer to Gas connect console high-voltage side parts on page 405.
a. Make sure that the spark gaps illuminate brightly.
b. If they do not, replace only the spark gap PCB.
Diagnostics and Troubleshooting
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811530 Instruction Manual XPR460