I have the Creality Falcon 2 Pro 22W. The unit was working fine about an hour ago. Now the air light is flashing red with alarm. When I start the machine, all lights are green, but as soon as I select “Frame”, the laser will run for just a few seconds then the air red light and alarm come on, and laser stops. The airflow is good out of the hose, and I’ve cleaned the filter. What else do I need to check? Thanks for your help.