Thank you for replies. I love the old tank and would use it instead of Resmed Aircurve 10 Vauto if it would work again

I have an old Respironics Bi-flex pro2 that I would like to keep as a back up, I love this old machine but it just won't start any more, I get an error code? E48 when trying to start it. Does anyone have any idea what that number is?

old Pro 2
Ramp start 7.0
Ipap 16
Epap 11
Flex 3


Aircurve

S mode

Ipap 16
Epap 11
Easy Breathe On
Ti Max 2,0
Ti min .3
Trigger medium
Cycle medium
Ramp time off

I used a Respironics Pro2 for approx. 10 years I loved that machine, never a problem breathing, it was my safe haven. It was getting old and the on/off button was starting to stick so I figured I better get a back up machine. To make a long story short I ended up buying a Resmed Aircurve 10 Vauto......