G3X fails, GFC 500 won't switch to G5

[PT20J]

Testing on my new system continues. Pulled PFD breaker disabling single GDU 460. Autopilot disengaged as expected, but will not re-engage with G5. G5 annunciates continuous PFT (white) and PTRIM (red). Talked to Garmin dealer/installer and he says he cannot find details for this in Garmin docs, so it is hard to troubleshoot. I searched the documentation and cannot find it described anywhere. The only references I've found is a Garmin Youtube video with Jessica demonstrating it in a Grumman Tiger and a single sentence in the marketing description on Garmin's G3X webpage. I tried it in a similar installation in a C-172 before I had mine installed and it worked.

Has anyone else run into this and/or found a resolution?

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[EricJ]

You need to start charging Garmin for the testing you're doing. 

[ArtVandelay]

Can we assume there’s separate breakers for the GAD29B and GMU11 that weren’t pulled?

[PT20J]

1 hour ago, ArtVandelay said:

Can we assume there’s separate breakers for the GAD29B and GMU11 that weren’t pulled?

Yep, the only breaker I pulled was the PFD which powers the GDU 460. The GMU 11, GSU 25D and GAD 29 are are all powered. Interestingly, if I put the G5 in configuration mode and look at the LRU status (with the PFD breaker pulled) all the servos and the GMC show good with 0% CAN bus errors and you can see the disconnect indication on each LRU toggle when pressing the yoke disconnect button. So it appears that the servos and CAN bus are good. The G5 works fine otherwise and it's ADAHRS will drive the G3X when I pull the breaker that powers the GSU 25D.

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[jamesm]

Have you looked at the data on micro SD card in the G5?  to see if it leads you clues why it didn't switch as expected? Provided you have micro sd card in the the G5 with data logging feature enabled.

[blaine beaven]

@PT20J did you ever rectify this? I’m looking at a similar install. Thanks!

[PT20J]

8 hours ago, blaine beaven said:

@PT20J did you ever rectify this? I’m looking at a similar install. Thanks!

Yes, it worked after loading the next software update. Still unsure what caused it.