DW has apt with her sleep doc soon and I am keeping my hands off her machine (ARGH) until she has met compliance and this problem resolved.. This is a new and multiple events behavior over last couple weeks. This has happened when she is awake and paying attention and there was NO blocked hose. The machine goes to it's max IP setting of 10 cm/H2O when she has sinus issues and then shuts down. Now I find this interesting as it relates to this thread http://www.apneaboard.com/forums/Thread-Back-Again . The blower motor is cooled by the delivered air so perhaps this blocked hose fault is actually triggered by an overheating blower motor?????
Updated: Philips Respironics System One (60 Series)
RemStar BiPAP Auto with Bi-FlexModel 760P -
Rise Time x3 Fixed Bi-Level EPAP 9.0 IPAP 11.5 (cmH2O)