The unit sat unplugged for a while, and it appears that the CR2032 CMOS battery died. I have replaced the battery, but am still receiving the message "Error settings reset to default values please contact service provider".
Other threads have suggested there is no cure other than to send the unit to ResMed. Do any of you have any additional information that might help before I send it off?
Sorry about the odd format references to other threads. I can't post clickable links yet.