Thank you all for your replies. The machine seems to be fine now - no more alarms or strange icons. There was no error message on the screen after the alarm other than the "X" through the card icon on the Info box in the lower left of the home screen. The user guide indicates the error is the card b...

This morning when I turned off my REMstar Auto, it made an extended beeping sound. Tonight as I was getting ready to put on my mask, I noticed that the card icon in the Info box had an "X" through it. That icon/warning is not given anywhere in the user's manual. Does anyone know what it means? I rem...