Troubleshooting for incorrect output gas pressure conditions (0-12-n)

An 0-12-n fault code identifies a condition where the output gas pressure is too low, too high, or not stable. The 0-12-n fault codes show only on a Computer Numerical Control (CNC) through an RS-485 serial interface. They do not show on the plasma power supply 2-digit display.

Fault codes and fault LEDs

Fault code Fault LEDs Torch LED Description Stops the system from operating?
0-12-1 The image shows the Power ONLight Emitting Diode.

ON

CNC use only The output gas pressure is too low. No
0-12-2 The output gas pressure is too high.
0-12-3 The output gas pressure is not stable.

Corrective action for 0-12-0, 0-12-1, and 0-12-2 faults

  1. For optimum system performance, make sure that the inlet gas pressure stays between 7.6 bar – 8.3 bar (110 psi – 120 psi) while gas is flowing.

    Never use more than the maximum gas pressure of 9.3 bar (135 psi).

  2. Which fault code do you see? OptionDescription
    0-12-1 Increase the inlet gas pressure from the gas supply source.
    0-12-2 Decrease the inlet gas pressure from the gas supply source.
    0-12-3 Adjust the inlet gas pressure from the gas supply source as necessary.
  3. Make sure that the gas lines do not have kinks, blockages, or other damage.
  4. Do a gas test to find if the plasma power supply's actual output gas pressure is lower than the set pressure by more than an acceptable quantity.

    Refer to Do a gas test.

  5. If the fault continues, examine the gas system and the solenoid valve by doing the troubleshooting steps in Troubleshooting for low gas pressure faults.