How to diagnose ESC failure

I'm currently rebuilding my 3DR hexa after a nasty crash a few weeks back, and I have one ESC (3DR 20amp) that won't turn on. When plugged into the lipo, it won't beep and I can't get the motor to respond. Replacing it with another ESC fixes the problem. 

I stripped back the heatshrink on the ends, and the connections to the lipo and to the motor all look good (I had suspected that the crash might have pulled a connection loose). Is there anything else I can check, or is it time to order a new ESC? Is it common for ESCs to fail somewhat regularly?


You need to be a member of diydrones to add comments!

Join diydrones

Email me when people reply –


  • Hi 

    I had a similar issue with a Multiplex controler:

    When powered it just beep and was not powering the motor. It was following a disconnection of the battery while in setup mode, setup was not complete.

    To "Reset" it I had to power the ESC with a 2S lipo battery instead of the 3S lipo battery. And it worked fine after that.

    Maybe you can try, this wont arm anything to apply lower voltage on the ESC.

This reply was deleted.


Shivchand Jaysaval liked Shivchand Jaysaval's profile
Aug 25