Troubleshooting for low inlet pressure for hydrogen, argon, or nitrogen

Diagnostic codes 695 – 697

Diagnostic codes 695 – 697 occur because gas inlet pressure in the gas connect console mixing module is less than the permitted range. Do a check of the gas inlet pressure during test cutflow and test preflow to find if the supply gas settings at the regulator are correct. Also examine the gas hoses and fittings.

Symptoms

Code Symptoms XPR® models XPR action Code cancels with...
695 The hydrogen (H2) inlet pressure (P10) for the mixing module in the gas connect console (only for OptiMix™) is less than 7.6 bar ± 0.4 (110 psi ± 5). All models None
  • Set process
  • Remote on-off
696 The argon (Ar) inlet pressure (P11) for the mixing module in the gas connect console (only for OptiMix) is less than 7.6 bar ± 0.4 (110 psi ± 5).
697 The nitrogen (N2) inlet pressure (P12) for the mixing module in the gas connect console (only for OptiMix) is less than 7.6 bar ± 0.4 (110 psi ± 5).

Corrective action

  1. During test cutflow and test preflow, look at the Computer Numerical Control (CNC) or XPR web interface to identify the gas inlet pressure in the mixing module inside the gas connect console.
    Look at:
    • The H2 inlet pressure (P10) for code 695
    • The Ar inlet pressure (P11) for code 696
    • The N2 inlet pressure (P12) for code 697
  2. Make sure that the gas inlet pressures inside of the gas connect console are sufficient as specified in Permitted inlet pressures to gas connect consoles.
  3. When gases are flowing and the pressure that you measured is not in the permitted range, use the regulators to increase the pressure, if necessary.

    Do not exceed the recommended pressures.

  4. If the pressure stays too low, examine the gas hoses and gas inlet fittings for:
    • Damage or kinks that can restrict flow
    • Leaks that can decrease pressure
  5. Replace the hoses if you find damage or kinks.
  6. Put the hoses in a different position if you find kinks that can be fixed.
  7. Replace fittings that have damage.
  8. Tighten loose connections if found.
  9. If you cannot find or correct the problem, speak to your cutting machine supplier or regional Hypertherm® Technical Service team.