新加坡采购需求：高压氧舱、高压氧舱、病人监护仪、超声波、AED、呼吸机

I have a hyperbaric machine that seems to be having some issues. When I switch to pure oxygen mode, it stops pumping air, and I notice a drop in the chamber pressure. This is concerning, as I can't have the high pressure and pure oxygen working simultaneously like it should. Could you please provide some advice on what might be causing this problem? I'm looking for potential solutions or servicing options to ensure the machine operates correctly again. Appreciate your help!