[NSRCA-discussion] Mezon 90 Lite investigation

[Vogel, Peter]

NO ESC likes to be connected to a main battery and not used to deliver power to a motor for an extended period of time!  It’s my many (including the Mezon pro) make a beep to alert the user that they are armed but haven’t been given a throttle input to drive a motor for an extended period of time.

Get Outlook for iOS<https://aka.ms/o0ukef>
________________________________
From: NSRCA-discussion <nsrca-discussion-bounces at lists.nsrca.org> on behalf of Xavier Mouraux via NSRCA-discussion <nsrca-discussion at lists.nsrca.org>
Sent: Monday, August 19, 2019 8:52:39 PM
To: nsrca-discussion at lists.nsrca.org <nsrca-discussion at lists.nsrca.org>
Subject: [NSRCA-discussion] Mezon 90 Lite investigation

This email is from an external sender.

Hi,

I have 2 planes with that ECS. The primary has 300 flights, the backup had 100 flights since the installation of that ESC.
Both planes use the BEC at 6.2V and a backup 2S lipo with a radio south regulator at 5.7V.

Getting ready for a 3rd flight on the backup yesterday, the ECS made sparks and smoke when I connected the battery. I took the ECS apart and found what I think is a FET busted.

2 observations: I accidentally left the backup battery and BEC switches ON after the 2nd flight about 10 minutes before and only noticed it after I connected the main battery. I may have touch the connectors twice in quick successions when connecting the battery.

I usually turn the backup battery ON first to check the voltage to the receiver and then the BEC.

See pictures in that album: <https://photos.app.goo.gl/gaN4bqG9BCgDyUzt8> https://photos.app.goo.gl/gaN4bqG9BCgDyUzt8

Since I have the same ECS on the other plane, I want to understand what caused it and if I did something wrong.

Abt idea what happened ?

Could it be repaired or is it done ?

Thanks you

Xavier


-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.nsrca.org/pipermail/nsrca-discussion/attachments/20190820/7e925d79/attachment.html>