When your device is plugged in and you are in the Stand-by mode, above the 0.0 there are several things flashing.
If you have a ramp set on your device you will see minutes flashing in the display above the 0.0.
If you do not have a ramp set there will be no minutes indicated.
You will see either CPAP with a number after it or APAP with a number after it.
This indicates the mode that your device is set in. This is determined by your prescription.
CPAP will provide one set therapeutic pressure between 4 - 20 cm H20.
APAP will provide a variable therapeutic pressure between 4 - 20 cm H20.
The number following the CPAP or APAP is the ZBreathe setting. That setting can be between 1, 2 or 3. There is no off feature for the pressure relief. (Please see "Do the Z1 and Z2 have a (ZBreathe) pressure-relief function?" for an explanation of this feature and how to adjust it.)
You will also see bt-on flashing. This indicates that the Bluetooth is enabled.
If you see bt-off and would like to enable this feature, please see "Settings".
The current date and time will also flash.
If you have a Z2 there is an Auto Off-On feature. This will appear as AOFF-ON.
This indicates that the feature is enabled. To disable it please see "Settings".