Started cut with water off

Is there a procedure to follow after trying to run a cut with the water off? I started a cut noticed the sound was different and the water was not connected to the faucet. I hit the emergency shut off. When I tried to start again the pump didn’t sound right so I stopped it and tried priming the high pressure system. The stream doesn’t go clear and water pours out of the abrasive tube input when I check the HP valve. Any suggestions? I would really like to get back to work this weekend rather than wait to hear from support Monday! Thanks.