If it appears that data is not showing up in myAir 24-48 hours after your sleep session, consider the following steps:
(1) Make sure the 11-digit machine serial number (s/n) and the 3-digit data device number (d/n) are entered correctly in myAir and match the numbers on the nameplate at the back of the machine.
(2) Make sure the device remains powered-up for transmitting data after your sleep session.
(3) Make sure the device is not set in "airplane" mode which kills the connectivity.
(4) Make sure you have connectivity by looking at the number of bars on the front panel of the machine.
(5) Now here is the most important step that I learned after hours spent with RESMED support, my DME Compliance Department, and swapping out the original machine
If your data does not appear in myAir or the DME's AirView -- MAKE SURE YOUR DATE AND TIME ARE SET PROPERLY.
My machine's date was set one month prior to actual delivery and any of the compliance data for the first 8 nights was discarded by the system as it was older than the myAir start date. I have no clue to how they will resolve the data date discrepancy for billing or compliance, but I kept the original SD data card to document usage.
IF YOU ARE STILL OPERATING WITHIN THE INSURANCE COMPLIANCE PERIOD, MAKE SURE YOU CONTACT BOTH YOUR DME PROVIDER AND RESMED SUPPORT.
Both RESMED and the DME people were helpful, but I was the one that found the issue and resolved the problem -- unfortunately after the time, effort, and trouble of replacing the first issued machine.
If there is anything I dislike about the AirSense, it is a lack of a swivel air outlet on the back (unless you use ClimateLine), the auto-diming front panel light feature (should be selectable), and the lack of a date and time display on the unit to serve as a clock.