thank you. I will check that site out. I am hoping it was a machine problem and NOT a "user" problem

okay, I will try again. Here is what happened: My CPAP alarm went off in the middle of the night. It was very loud (woke my room mate up--she was in her room downstairs---both of us had our doors closed). I was startled--so pulled off my mask and hit the button to turn off the machine. I got up and ...

I thank those who took my question seriously. The only reason I asked the question on this forum was because I thought it might be a sympathetic audience, as well as maybe more knowledgeable than people who have no idea what a CPap is or what it is for. I will probably not come here again for answer...

I tried checking what happens with an air leak and it is just a beeping sound. This was a HUGE siren! I have sinus disease and have been struggling to breathe even when awake, so this was a huge shock and I am a bit scared about what it meant!

It may have been this: Mask alert - You can enable or disable the mask alert setting. If this feature is enabled, the mask alert will appear on the display screen when a significant mask leak is detected, and an audible alert will sound. Alert present until action is taken. I was too shaken up to l...

OK--I have a DS 550 with a Comfortgel blue nasal mask.

I didn't see any message, but I didn't really realize what had happened until several minutes later (after I had turned the machine off).

I have a REMstar Auto A-Flex. I use a mask which fits over just my nose. I do NOT use the humidifier.

My C-Pap made a screaming sound last night. It was very loud and very scary. It took me several minutes to figure out what was making the horrible noise next to my ear. And my room mate was freaking out thinking the house was on fire. Anyone out there who knows what this means? Is this common? Does ...