Cutmaster 81 plasma cutter when turned on, starts normal but air solenoid keeps going on and off. What could be the problem?

Question edited for clarity and order.

You can't. It is 400 volts - 3 Phase.

Cutmaster 25 Manual Plasma System

https://www.westermans.com > victor-thermal-dynamics...

25mm genuine cut, 30mm maximum cut, 38mm severance; Input: 3 ph. 400V 50/60Hz 20A; Output: 80A @ 40% DC; Front panel LED's indicate status conditions for ...

https://www.google.com/search?q=Plasma+cutter+thermal+dynamics+25

..

blocked air line to cutter , air control solenoid not being energized by the cutter trigger

Check antifreeze and level of your rad,and your thermostat it might be opening to soon.

Hi; Check the following troubleshoot and see if you can ID the problem:
Problem: Gas flows continuously when power is turned on, AC indicator flashes 1. Torch switch is activated (closed) before user turns power on. a. Release torch switch. 2. Faulty torch switch a. Check torch switch for continuity. Replace if necessary.
Problem: Gas flows continuously; Torch will not pilot when torch switch is activated; AC indicator ON 1. System is in SET mode a. Change to RUN / Rapid Auto Restart / SET switch to RUN (up).
Mostly of the problems found is that customer has the switch line on to SET instead of RUN.
Hope this help. Have a good afternoon.

Try and replace the swirl ring. We had the same problem and it fixed it. They cost around 35 bucks

We had the same problem. Try and replace the swirl ring in the torch head. It costs around 35 dollars. It worked for us.

check pilot/output board

worked on units for several years,my first thought was torch consumables,then torch itself,so here we go.make sure all the consumables are exact for the torch,make sure all parts are brand new,(all parts,that way we can elimenate that part of trouble shooting).check that the ground is tight on the unit and work peice.When you bought the new torch head did you also buy the lead to the head?If not possible that could be the problem.

check the air soleinoid.

Check contacts in tip and be sure it is all lubed correctly. If you have good air pressure and flow it should arc after pulling the trigger for about 2-3 seconds.