Troubleshooting for a main contactor fault

Diagnostic code 764

Diagnostic code 764 occurs when the current for the main contactor is too high.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
764 The main contactor driver finds an overcurrent condition. All models None
  • Set process
  • Remote on-off

Corrective action

  1. Examine the main contactor and wiring, and replace them if you find damage or excess wear.
  2. Make sure that you have the most recent XPR firmware.

    You can log in into the Xnet at www.hypertherm.com to download it.

  3. If you cannot find or correct the problem, speak to your cutting machine supplier or regional Hypertherm® Technical Service team.