7.5 Amp Breaker

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   Yesterday, while shooting practice approaches into 28J, my IDF440 screen went black. No map no nothing. Just a black screen. I recycled the radio and it booted back up and everything appeared normal for about ten minutes before the screen went white. The radio would not respond to any command including power off. 
I powered it down by turning off the Master. When I attempted to power it back up, did not get the Avidyne Splash, just a white screen and no Radio control at all.

Flew home and put the airplane back in the hanger (I live on an airpark) and then tried to talk to someone at Avidyne (that turned out to be an exercise in futility).

Later on, I went back out to the plane and powered up the IDF, and it booted up as normal. What is going on here? Maybe an overheating issue? it was 95 plus yesterday here in North Florida. 

I described  the issue I was having on the Avidyne Facebook group, to see if anyone else had this problem. Got a reply from another user that said he has seen this on 14 volt Radios that did not replace the 5AMP breaker with a 7.5AMP breaker. My installation was a G430W upgrade and I dont believe anyone looked at the circuit breaker, but a quick look at the Avidyne Install manual clearly shows a 7.5 AMP breaker. Kind of an odd ball size. I have 5, 10, and 15 AMP breakers in my shop but no  7.5 AMP breakers so I ordered a couple.

And this brings up another issue. I never did like the way the IDF powers up as soon as you turn on the Master.. I generally then power it back off before starting the engine, then powering it back up.

Is their any reason or problem with installing a Radio Master between the breaker and the Radio? Then I could start the plane without the radio powering up, and then power the radio up after engine start?

Claude Allen
Green Cove Springs, Florida

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allenc3 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 04 Feb 2019 Location: 32043 Status: Offline Points: 126	Post Options Post Reply Quote allenc3 Report Post Thanks(0) Quote Reply Topic: 7.5 Amp Breaker Posted: 26 Sep 2020 at 2:21pm
	Yesterday, while shooting practice approaches into 28J, my IDF440 screen went black. No map no nothing. Just a black screen. I recycled the radio and it booted back up and everything appeared normal for about ten minutes before the screen went white. The radio would not respond to any command including power off. I powered it down by turning off the Master. When I attempted to power it back up, did not get the Avidyne Splash, just a white screen and no Radio control at all. Flew home and put the airplane back in the hanger (I live on an airpark) and then tried to talk to someone at Avidyne (that turned out to be an exercise in futility). Later on, I went back out to the plane and powered up the IDF, and it booted up as normal. What is going on here? Maybe an overheating issue? it was 95 plus yesterday here in North Florida. I described the issue I was having on the Avidyne Facebook group, to see if anyone else had this problem. Got a reply from another user that said he has seen this on 14 volt Radios that did not replace the 5AMP breaker with a 7.5AMP breaker. My installation was a G430W upgrade and I dont believe anyone looked at the circuit breaker, but a quick look at the Avidyne Install manual clearly shows a 7.5 AMP breaker. Kind of an odd ball size. I have 5, 10, and 15 AMP breakers in my shop but no 7.5 AMP breakers so I ordered a couple. And this brings up another issue. I never did like the way the IDF powers up as soon as you turn on the Master.. I generally then power it back off before starting the engine, then powering it back up. Is their any reason or problem with installing a Radio Master between the breaker and the Radio? Then I could start the plane without the radio powering up, and then power the radio up after engine start? Claude Allen Green Cove Springs, Florida
	Claude

teeth6 Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 10 Mar 2014 Status: Offline Points: 741	Post Options Post Reply Quote teeth6 Report Post Thanks(0) Quote Reply Posted: 26 Sep 2020 at 5:07pm
	I have the avionics master control my IFDs. I think that’s a better way to go.

oskrypuch Members Profile Send Private Message Find Members Posts Add to Buddy List Senior Member Joined: 09 Nov 2012 Location: CYFD Status: Offline Points: 3061	Post Options Post Reply Quote oskrypuch Report Post Thanks(0) Quote Reply Posted: 26 Sep 2020 at 6:40pm
	You may not have an avionics bus, but if you do, you definitely want the IFD installed there. * Orest

forkauto Members Profile Send Private Message Find Members Posts Add to Buddy List Groupie Joined: 30 Apr 2018 Location: Maryland Status: Offline Points: 51	Post Options Post Reply Quote forkauto Report Post Thanks(0) Quote Reply Posted: 29 Sep 2020 at 8:11am
	Mine power off of an "avionics master" switch after starting engine.