Already Fixed.. and there was no fire ... Apparently a main BUS line overheated, and tripped safety systems (breakers) for shutdown...
The issue has been addressed, and the systems are now back online.. In fact, power was restored relatively quickly, but system pressurization takes time.... Normal maintenance for this system is generally planned FAR in advance, because of the re-pressurization time.. BTW, the air pressure is also used for AVAC trash collection system as well.