Something up with Mamba Max?

I have been running my MM in my truggy for awhile on 4s with CCBEC and fan, the problem is that i can run for about 5min. and it shuts off, i let it sit there for 5-6min, and i here the tones and i am able to go again. It does this over and over and it gets annoying when trying to race. It runs great between shutdowns though. Anyone know what the problem may be.