Generators

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chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Generators

Post by chevelle505 » Sun Jan 19, 2020 4:41 pm

if starting with ground power, I cannot get the generators to reset, the light goes out for a sec then pops back on and gen stays off..starter switches are both off, ive messed with the gen ties..nothing works...another bug???

Raptor
Posts: 411
Joined: Wed Feb 26, 2014 3:07 am
Re: Generators

Post by Raptor » Sun Jan 19, 2020 4:58 pm

GPU must be disconnected IIRC.

With GPU, you start the engines first, then disconnect the GPU and then reset the gens.
The checklist for this is in page 49 (12-12) of the User Guide. Specifically look at steps 15 to 30

chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Re: Generators

Post by chevelle505 » Sun Jan 19, 2020 9:45 pm

Yup, ive done that. However, after i use the gpu at all..the gens dont work..but now ive read that in another post as well and it appears to be another bug..no worries. Sorry for starting an entire new threat..i did the search for this but somehow missed it..oops

iangrant1981
Posts: 35
Joined: Sat Jul 07, 2018 5:33 pm
Re: Generators

Post by iangrant1981 » Sun Jan 19, 2020 11:49 pm

Have your starters disengaged? The starters and generators are the same component and can't serve both functions at once (power can only flow in one direction) so if the starters are engaged the generators won't operate and visa versa.

chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Re: Generators

Post by chevelle505 » Mon Jan 20, 2020 2:05 am

yup, both starters are off

KenG
Posts: 157
Joined: Sat May 09, 2015 2:33 am
Re: Generators

Post by KenG » Mon Jan 20, 2020 11:35 am

Make sure the External Power switch is turned OFF first. Then call for the GPU to be disconnected. Once the Ground Crew indicate the GPU has been disconnected and cleared then reset the Generator by holding it in the RESET position for more than 1 second.

If that is not working then something is interfering in your version of P3D. I have done numerous GPU starts and they work just fine.

metzgergva
Posts: 91
Joined: Wed Jun 28, 2017 8:09 pm
Re: Generators

Post by metzgergva » Mon Jan 20, 2020 2:49 pm

To me it only happens when I land and shut down engines and connect GPU thereafter. On a fresh start of P3D and the aircraft it all works well. It looks to me that the sequence of starting left engine first, then bringing left generator online and then disconnect the GPU may cause the problem. But I cannot find a defined sequence to reproduce it :?
As the battery drains so quickly by just the time that a bit complex flight plan is entered, I'm using the GPU most of the time to assure that I do not get an electrical shutdown while entering the FMS data. But then I do get the GEN problem and that can only be resoled by shutting down P3D. I tried to but the plane all down to a cold& dark situation, but the GENs once they failed to get online, they would not be reset by that procedure either.

chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Re: Generators

Post by chevelle505 » Mon Jan 20, 2020 3:21 pm

As the battery drains so quickly by just the time that a bit complex flight plan is entered, I'm using the GPU most of the time to assure that I do not get an electrical shutdown while entering the FMS data.
See, i thought you could do that, but when i disconnect gpu in order to go to gen power, the fms shuts down and i loose the entire flight plan, having to sit there with engines running and re enter everything. I know for a fact this is not how it works i the real world king air 200...they run gpu on the ground for air conditioning and enter flight plan and so on. Maybe its different for the 350i but it seems counter intuitive to have a gpu for that, only to loose everything while switching power sources. Im sure im missing something here, maybe on the 350 gpu power is only for running the air conditioning and to aid in engine start? Also, the KA200 im referring to may be quite a bit different, they also can run the air conditioner on the ground with engines off (although it doesnt cool as much as with engines running)..i could have sworn you needed engines running for ac anyway as it usually is run off bleed air...maybe theres some sort of stc they did to drive a compressor on the ground?

KenG
Posts: 157
Joined: Sat May 09, 2015 2:33 am
Re: Generators

Post by KenG » Wed Jan 22, 2020 12:35 am

You can run the vent blowers on the ground and you can run the ELEC HEAT, but the AC requires the right engine to be running to turn the AC Compressor as it is driven by a belt off the accessory pad on the engine. Just because the Environmental Mode switch is in AUTO does not mean you are getting AC.

When you unplug the GPU the FMS will shut down, (due to the HED no longer sensing 28VDC and opening the GEN TIES) however, it will retain what you programmed in it so long as you promptly turn the engine generators RESET/ON. I think MV choose 11 minutes as the amount of time before the FMS dumps and that is plenty of time.

chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Re: Generators

Post by chevelle505 » Wed Jan 22, 2020 10:08 pm

Alright that makes sense..thanks for clearing that up. I just remembered a king air based with us always running a gpu for "air conditioning" ect. I'm guessing now that they were just after the air circulation more than anything. Im going to have to experiment with the fms now too

chevelle505
Posts: 57
Joined: Fri Jan 17, 2020 3:33 am
Re: Generators

Post by chevelle505 » Sat Jan 25, 2020 1:05 pm

Alright guys just to confirm, i tried everything again step by step, it just doesn't work! if I use the gpu period, the gens will just close and then trip, they WILL NOT close after I use the gpu. really hope this makes it on the bug list!


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