1 of 4 ESC getting hot during idle

Greetings All,

I am in the process of assembling a quad using an APM2.0 as the flight controller.  The craft also has a Futaba 7-ch receiver, a Mini-OSD, an EZ-20 Sonar Sensor and a 3DR Radio for telemetry.  The whole system runs on one or two 4S Lipo

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