RX8+2050kV Buggy - Started coggind and doesn't run anymore

[Lauri]

Hi,

I was very happy with the Tekin RX8 + Buggy T8 2050kV setup. I ran 6x10min raceday and got second place overall without running it before the raceday. Felt really smooth, worked really nice!

Today I went training. First 10min was okay. Next run I tried low punch setting but it was awful to drive (2-3 was the setting I think). So I went back to maximum punch again. After that about minute or less later the car started cogging a lot. Didn't accelerate anymore and then went completely dead. Maybe it went crazy just after changing punch back to max - don't remember.

I recalibrated the radio. I factory reset the ESC and recalibrated. I tried it in "pit mode". Without pinion the motor spins to maybe 100rpm max, it doesn't have any torq so with pinion and drivetrain connected it sometimes doesn't spin at all. Leds on ESC go to max, but motor only just spins, slowly. All sensors seem ok, all three leds light when you turn the motor (sensor ok). Without sensor wire motor spins a bit more, but still - with full throttle few hundred RPM and cogs

I did get the 1-3-5 leds flashing error few times. Then it goes away and everything "works" - with full throttle few hundred rpm. And the strangest thing is: I can't change the ESC mode values!

After factory reset I have the stock settings and CAN NOT change them. I press mode and go to motor type. Press Inc - I see the stock motor type (3 leds I think it was). But after pressing Inc more to change the value it goes out of that mode. Led 1 lights up an... well, you can't change ANY mode setting! Can't change the low voltage cut, can't change motor type, can't change anything!

What to do? It seems to be software error. How could I reload/reflash/reset the ESC?

I can check the motor tomorrow. But I think/hope it is okay and rotor is fine (new motor!).

I can use the Hotwire on Sunday. Can I do more low-level reset with Hotwire?

Setup: Xray XB808 buggy RTR 3400g
LiPo: 4S 35C 5000mAh only gets warm after 10min run. Low iR battery
Power: 18A average = 3000mAh spent over 10-11min run
We have below freezing outside, track is under roof with outside temp -2 to +5 Celsius so no overheating. Gearing quite easy (40mph calculated) and motor only 50-60 Celsius after run.

Help - what to do, what to check? Seems to me I need to reset the ESC but I did what the manual stated and no use :(