Troubleshooting for a pilot arc timeout

Diagnostic code 521

Diagnostic code 521 identifies a problem with the pilot arc.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
521
  • No current is found on the work cable for 500 milliseconds after the pilot arc current is established.
  • For a minimum of 3 milliseconds, the sensor in the work cable cannot measure current greater than the transfer reference value.
 All models End of cycle
  • Start process
  • Set process
  • Remote on-off

Corrective action

  1. Make sure that the transfer height is correct.
  2. Examine the consumables.
  3. Replace consumables that have damage or excess wear.

Verification

Do a torch lead test. Refer to Do a test for continuity between the nozzle and workpiece.