Hello Guest, Welcome to Apnea Board !
As a guest, you are limited to certain areas of the board and there are some features you can't use.
To post a message, you must create a free account using a valid email address.

or Create an Account

New Posts   Today's Posts

Odd problem with air flow with Dreamstations
Odd problem with air flow with Dreamstations
I seem to have noted an odd and performance lowering behavioral of my new Phillips Dreamstation ASV.
I have had higher AHIs for the past three weeks.  Nothing bad, still low and under 5per night, but nothe first two nights lows of less than .5.
Last night I noted a lower that normal (first two nights worth) air flow.
WTF??? So I unplugged the system to cause a reboot….and it worked I got a notable improvement to air flow.
But due to the impact of the air start up air, which is a little more a hit than the older 950/960 systems,  I began starting the system with the hose disconnected from the mask, until it was up and running.
I did that after the reboot a second power up and the air flow was reduced…so a reboot again and I kept the air hose connected and took the “hit” of the startup and the air flow stayed full.
My best guess as to what is happing is there is a fan speed control, like a REV Limiter on cars, and with no back pressure on the hose (IE open) it cuts in and lowers the fans top speed so it does not over rev.
BUT it seems this control once turned on does not completely shuts down and when I hook the hose after allowing it to run wild it stays slightly in control lowing the air flow.
So I report this to ask has anyone else seen this with their systems, and for the techs to say if I am right.
The next couple of nights will also help prove my theory by how well I do sleep wise.
Post Reply Post Reply

Donate to Apnea Board  

Possibly Related Threads...
Thread Author Replies Views Last Post
  Airfit P10 vent problem deknapp1 1 100 02-24-2021, 02:21 PM
Last Post: Sleeprider
  Updated Dream Station Firmware Problem patlink 2 106 02-24-2021, 06:52 AM
Last Post: Dawnstar
  Help with awakening problem and data interpretation Dannyj1981 24 510 02-19-2021, 02:58 PM
Last Post: SarcasticDave94
Sad VAUTO card problem staceyburke 27 686 02-18-2021, 09:07 AM
Last Post: GuyScharf
  Flow Rate curve, how to tell if there is an issue? felipao11 3 202 02-16-2021, 05:51 PM
Last Post: Sleeprider
  Noise problem Resmed Autosense 10 Buddy1992 29 13,760 02-14-2021, 10:41 PM
Last Post: g200
  Do I have actual Flow Limitations based on the OSCAR Reports? Feelrefreshed 3 248 02-08-2021, 05:48 PM
Last Post: Sleeprider

New Posts   Today's Posts

About Apnea Board

Apnea Board is an educational web site designed to empower Sleep Apnea patients.