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Randy.McFarland(at)novell
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 Posted: Tue Apr 21, 2009 9:29 am Post subject: Avionics cooling fans - yea or nay?? |
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I have a Garmin 327 transponder and Dynon D-10 that I suspect become
unreliable and freeze or lock up due to high behind the panel
temperatures. Have any of the group experienced avionics issues related
to heat, and will/does cooling fans provide enough cooling to eliminate
the problems?
Randy
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jetboy
Joined: 22 Jul 2006
Posts: 233
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| Posted: Sat Apr 25, 2009 3:35 pm Post subject: Re: Avionics cooling fans - yea or nay?? |
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Its unlikely that heat will cause both items to fail. You didnt say what aircraft it is or what other equipment is stacked below your problem gear, or what climate you are operating in.
LCD displays normally freeze when it is cold, go dark when they are too hot. Digital electronics can halt from operating this is more often associated with bad design bugs (these devices are the ones that the manufacturer has belatedly required fitting of a large capacitor to the supply leads, a separate power master switch, or both), humidity, bad power supply such as a neglected battery, surges in the charging system, or just turning it off and on a dozen times when you start the plane.
If you think it is overheating, buy a small indoor/outdoor digital thermometer and tape the probes to the rear of the devices. check against the TSO data or manufacturers recommendations 50 deg C or 120 F should be acceptable.
Ralph
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Ralph - CH701 / 2200a |
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