Troubleshooting for high DC bus voltage

Diagnostic code 621

Diagnostic code 621 occurs when the Direct Current (DC) bus voltage is too high.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
621 The DC bus voltage is more than 414 V. All models Shut down Remote on-off

Corrective action

  1. Make sure that the input-line voltage is within ±14% of nominal.

    Refer to General input power requirements.

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