Hypertherm XPR170 - CAN Codes; Table 36 - Diagnostic Codes

Diagnostics and Troubleshooting
8
XPR170 Instruction Manual 810060 269
520
Alert
Ignite t/o (no pilot
arc)
The sensor in Chopper 1 did
not measure current during
the 600-millisecond ignite
period because no current
path completes between the
nozzle and the electrode.
1. Make sure that the transfer height is correct and
that the torch is not in contact with the
workpiece.
2. Examine the consumables. Replace the
consumables that have damage or excess wear.
3. Make sure that both spark arrestors (also
known as spark ignitors) illuminate brightly.
4. Inspect the main contactor:
• Look for black or rough surfaces that are
difficult to remove.
• Make sure that the contactor closes
immediately after the Start command is applied.
5. If the contactor is bad, replace it.
6. Examine the pilot arc relay. Make sure that it
closes.
7. Examine the wiring. Make sure that the coil
receives 24 VDC.
8. Inspect the Start circuit/Pilot board. If the Start
circuit/Pilot board is bad, replace it.
9. Do a torch lead test. Refer to How to test
continuity between the nozzle and workpiece on
page 333.
End of cycle Start or set
process;
remote on-off
521
Alert
Pilot arc t/o (no arc
transfer)
No current detected on the
work lead for 500
milliseconds after the pilot arc
current is established.
For a minimum of 3
milliseconds, the sensor in
the work lead is unable to
measure current greater than
the transfer reference value.
1. Make sure that the transfer height is correct.
2. Examine the consumables. Replace the
consumables that have damage or excess wear.
3. Do a torch lead test. Refer to How to test
continuity between the nozzle and workpiece on
page 333.
End of cycle Start or set
process;
remote on-off
Diagnostic code
number and
category
Diagnostic code
name
Description Corrective action XPR action
Code cancels
with