lowering the air pressure

I have a Remstar Auto with C-flex M # 1017453 How do I lower the air pressure. It was set at 7 and now it is blowing much higher around 14. It is discontinued and I need it as a back up to my newer machine.

The Legacy series machine?? That looks like this one.
http://www.cpap-supply.com/REMstar-Auto ... 017453.htm

You can request the provider manual here or there are short cut directions as to how to get to clinical setup here at this link.
http://www.apneaboard.com/adjust-cpap-p ... tup-manual

The Legacy model was pre M series which was released in 2007.....
Respironics REMstar Auto (older pre-2007 standard unit, not "M" series, not the PR System One): you can enter the setup menu by holding down the Ramp button and both of the right and left arrow buttons under the display window, while plugging in the CPAP. The 3 buttons must be held down until the setup screen starts