Symptoms
Code Symptoms XPR models XPR action Code cancels with...
720 Pressure out (P21) is more than one of the pres-
sures on the inlet side of the mixer (P10 – P12) by
0.069 bar (1 psi) or more.
When this occurs, the mixer decreases flow to pre-
vent backflow, which can have an effect on cut qual-
ity.
All models None • Start process
• Set process
• Remote on-off
Corrective action
1. Make sure that the consumables are correct.
2. Make sure that the supply gas pressure is sufficient.
3. Make sure that there is a sufficient quantity of gas in the gas cylinders, if necessary.
4. Increase the N
2
, Ar, and H
2
pressure during test cutflow to be in the permitted range.
5. Make sure that you have the most recent XPR firmware.
You can log into the Xnet at www.hypertherm.com to download it.
Troubleshooting for gas mixture faults
Diagnostic codes 721 – 723, 726
Diagnostic codes 721–723 and 726 occur when there is a gas mixture failure.
Symptoms
Code Symptoms XPR models XPR action Code cancels with...
721 There was a failure of the mixing parameter check-
sum.
722 There was a failure of the mixing flow calibration.
723 There was a failure of the mixing pressure calibra-
tion.
726 There is a problem with the mixing system clock.
All models Ramp down • Set process
• Remote on-off
Diagnostics and Troubleshooting
8
365811530Instruction ManualXPR460
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