APU LCV and ISOL switches not working after a long time on ground

[Lauramks2]

This has happened to me twice now. I have been watching videos on running the flight compartment checklist. In the checklist I performed the bleed air tests and the switches worked fine. After a break and running the engine start checklist, these two valves no longer work. I thought maybe a CB popped but all are in. If I look at the synoptic, nothing moves when I press the switch buttons. I have good AC and DC power.  My only recourse is to start with a new cold dark aircraft. 

I don't think this is a systems issue but more of a glitch in the aircraft. Anyone experience this? 

[Pils]

On 6/1/2024 at 6:23 PM, Lauramks2 said:

This has happened to me twice now. I have been watching videos on running the flight compartment checklist. In the checklist I performed the bleed air tests and the switches worked fine. After a break and running the engine start checklist, these two valves no longer work. I thought maybe a CB popped but all are in. If I look at the synoptic, nothing moves when I press the switch buttons. I have good AC and DC power.  My only recourse is to start with a new cold dark aircraft. 

I don't think this is a systems issue but more of a glitch in the aircraft. Anyone experience this? 

Not been reported by others. Can you record and publish your own video of the issue by chance?

[Lauramks2]

This has happened to me as well. Yesterday I was pushing the bleed air buttons and accidently pushed the left tenth stage valve. It was indicating closed but when I pushed it all the valves started working again and I was back to normal. I am guessing it is a glitch. This valve issue seems to happen if I leave the sim for awhile when I am in the middle of the checklist. I saw reference to them locking out during an overheat situation and thought if I turned off the APU for awhile it would fix itself but that was not the solution. 

[Lauramks2]

I will if I can duplicate the issue. Like so many maintenance issues, it has to break again before we can fix. 

[Mammux]

Same thing happened to me. The sim was paused overnight, and now I am unable to start the right engine. The right valve in the 10th stage never opens, even when I press the start button.