bermude

Hello everybody, While I'm really enjoying the aircraft, I have tried to follow some procedures as close to the real ones as possible. This is when I noticed that while I'm on the battery power only, the AC emer bus doesn't seem to get any current while the real one in the video I linked does. (timestamp 1:22) I have also noticed that just after that, when I tried to do the apu fire test, no chime would beep while again in the real one it does. Did anyone eperience the same or is it an installation issue ?