Originally Posted by jmcelroy42 (Post 13563146)

What is the benefit from running no fan? I have this esc and 3 rx8 gen2's and just always had the fan on all of them and set to auto. Is it just the weight savings or is there power to be gained?

Originally Posted by Randy_Pike (Post 13561417)

If you start seeing led 6 and 7 lit up, grab a fan.

If you're coming off the track and it shows 4 led's after a full run, you're good.

You can use the data logger to verify your esc heat at the end, just make sure you clear the run before you test, so you're getting the latest data.

Originally Posted by jmcelroy42 (Post 13563146)

What is the benefit from running no fan? I have this esc and 3 rx8 gen2's and just always had the fan on all of them and set to auto. Is it just the weight savings or is there power to be gained?

Originally Posted by sduffy77 (Post 13564525)

Well I'm having all kinds of issues with this RSX. When I dropped my car on the track on Friday the throttle glitches really bad. When I pick it up and revs no problem.
I've already changed the sensor wire and checked all the motor leads.
Also I'm running a 10A Castle BEC and if I unplug that and try to power up off the internal BEC of the RSX I get no power at all.
I just bought this back in June. Never had any heat issues with it or anything. Just all of a sudden stopped working.

Originally Posted by sduffy77 (Post 13564525)

Well I'm having all kinds of issues with this RSX. When I dropped my car on the track on Friday the throttle glitches really bad. When I pick it up and revs no problem.
I've already changed the sensor wire and checked all the motor leads.
Also I'm running a 10A Castle BEC and if I unplug that and try to power up off the internal BEC of the RSX I get no power at all.
I just bought this back in June. Never had any heat issues with it or anything. Just all of a sudden stopped working.

Originally Posted by Souk (Post 13566436)

What kind of radio/receiver do you use? Have you calibrated it to your radio? Have your tried rebinding your radio and receiver? Do you have the latest updates? Have you just checked the settings on a comp with hotwire to make sure nothing is funky?

Originally Posted by Randy_Pike (Post 13566470)

Why are you using a 10 amp bec with the RSX?

Originally Posted by sduffy77 (Post 13567154)

I have a Spektrum DX4R w/ SR2000 receiver. Yes recalibrating was the first thing I did.
I can try to rebind but I have my doubts that is the issue.
Yes I hooked it up to hotwire last night and didn't notice anything odd.


I had the external BEC from my last setup because my Novak esc couldn't power the high voltage servo I had. I kept it in there because I figured it would be less stress on the Tekin esc since it didn't have to use the internal BEC to power the receiver and servo.
I've been running this setup since the end of June with no issues.

I just did the sensor checker on the esc and very faintly I can see the 3 sensors firing off on the led display.

Originally Posted by sduffy77 (Post 13567154)

I have a Spektrum DX4R w/ SR2000 receiver. Yes recalibrating was the first thing I did.
I can try to rebind but I have my doubts that is the issue.
Yes I hooked it up to hotwire last night and didn't notice anything odd.


I had the external BEC from my last setup because my Novak esc couldn't power the high voltage servo I had. I kept it in there because I figured it would be less stress on the Tekin esc since it didn't have to use the internal BEC to power the receiver and servo.
I've been running this setup since the end of June with no issues.

I just did the sensor checker on the esc and very faintly I can see the 3 sensors firing off on the led display.

Originally Posted by sduffy77 (Post 13567806)

I think my next step is to tear it all down and resolder everything.
One odd thing is when I remove the external BEC and try to power on the system from the esc, I get nothing. It was late so I'll double check this before tearing down.

Originally Posted by Randy_Pike (Post 13567930)

Well let's remove the BEC for now and eliminate it as part of the problem. Make sure you set your RSX's BEC to the HV setting and see if that changes the issue.

Originally Posted by Randy_Pike (Post 13567935)

Ok, stop. If you have power going to the esc and it won't turn on this is the last test.

Unplug the fan if equipped, unplug the esc from the receiver, unplug the sensor harness from the esc. Power up the esc? Does it light up?

If not it needs service. Contact [email protected]

Originally Posted by Silver04RS (Post 13567938)

As Randy and a couple others have said, you shouldn't need an external BEC. If you are running a HV Servo in your vehicle, you can access the settings in the RSX via a Tekin Hotwire and turn up the voltage to your servo.

The only time you should need a external BEC on a Surface RC is if you are running a cheap ESC and a servo that pulls a lot of power (IE: CC w/ Spektrum)

If its cutting out on you my guess would be a poor solder job on one of your main power wires. Give them a quick wiggle to see if they break loose or just recook them for a scond with a solder gun.