Troubleshooting for duty cycle limit on proportional valve supply voltage

Diagnostic code 719

This code occurs when a proportional valve supply voltage for some gases is at maximum duty cycle.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
719

The H2, Ar, or N2 proportional valve supply voltage is at 100% duty cycle. Total flow is decreased to keep the mix percentage of the other gases accurate. (OptiMix™ only)

Because the mixer tries to supply a flow, the outlet pressure can continue to increase.

 All models None
  • Start
  • Set process
  • Remote on-off

Corrective action

  1. Make sure that the consumables are correct.
  2. Make sure that the inlet pressures for N2, Ar, and H2 are consistently in the permitted range.
  3. Make sure that you have the most recent XPR firmware.

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