Originally Posted by
Snoopy
What "attention getters" are you talking about?
The only factor with running the APU for extended periods is you need to have the APU generator on because it powers the hydraulic pump cooling fan. Without this fan running it could result in an overheating condiction. You won't get any warnings.
Running power off the APU Generator is the same as running off external power or engine power. The CDU warm start is is an auto-download of system data which occurs after the airfract has landed and airspeed falls below 75 knots or when the LASTE EAC is automatically disengaged. It has nothing to do, directly, with the APU.
Hope this helps...