Troubleshooting for low inlet pressure for water

Diagnostic code 701

Diagnostic code 701 occurs because water inlet pressure in the gas connect console is less than the permitted range. Do a check of the pressures, examine the water hoses and fittings, and make sure that the shield water quality is good.

Symptoms


Code	Symptoms	XPR® models	XPR action	Code cancels with...
701	The water (H₂O) inlet pressure (P8) in the gas connect console (only for VWI™ or OptiMix™) is less than 2.07 bar (30 psi).	All models	None	Set process Remote on-off

Corrective action

During test cutflow and test preflow, look at the Computer Numerical Control (CNC) or XPR web interface to identify water inlet pressure in the gas connect console.

Look at the H₂O inlet pressure (P8) for code 701.
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.
Make sure that the water inlet pressure is at least 2.07 bar (30 psi).
When water is 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.
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
Replace the hoses if you find damage or kinks.
Put the hoses in a different position if you find kinks that can be fixed.
Replace fittings that have damage.
Tighten loose connections if found.
Make sure that the shield water quality is good.

Bad quality can have a bad effect on the shield water regulator. It can cause diagnostic codes for low inlet pressure. Refer to Shield-water requirements (VWI and OptiMix).
If you cannot find or correct the problem, speak to your cutting machine supplier or regional Hypertherm® Technical Service team.