3 MMM's all toast......WTF??
 

I'm usually pretty quiet about this stuff, but I have gone through 3 MMM's so far in just a few short months. All of them keep doing the same thing. I run them for about 2-3 weeks no problem on practice runs at the track, then they shut off and never turn on again. WTF?? This is ridiculous!! Is their some new version of the MMM that has addressed this problem. I have a race on Sat. (this weekend) and now have no ESC to run :grrrrrr:

BTW: the setup is a MMM on 4S, 1521 1.5D and geared for only 35mph. Motor and ESC don't even begin to get warm.

Hmm, when I hear something like this, I tend to look deeper. Could it be a servo is shorting out (or under very heavy load) toasting the BEC? Things like that. Sometimes, seemingly unrelated items can cause headaches.

Also, make sure the ESC has version 1.20 firmware.

All of them have had the 1.20 FE, also the BEC is out of the loop. Using a UBEC. Also the steering servo has been swapped since the 2nd MMM was toast went from a Hi-tec to a JR8711, so its not the servo. Also my buddies MMM did the same thing on his E-revo after 3 weeks or so as well. Very upset at this point since the 2nd race of the season I will be scambling to borrow a ESC from someone.

i myself run only mm's just for this, reason, im not quite sold on these yet

Just to be sure... If you use UBEC did you removed from connector red wire on ESC Signal cable?
What TX/RX system you have?

What version of MMM were they?

Yes red cable removed and DX2.0 is the TX/RX. I can put my cheap Turnigy 100A controller and stick 8S on it and run it all day and never have a problem. I have had that controller for almost 2 years now.....no problems with it, or my HV110.

1 was V2 and the latest 2 have been V3

contrary to what Castle says, IMO the HV 110 makes a very good truck ESC, I am not sold on the MMM.

My V1 stopped working yesterday like that. Just decided it wasn't pushing my Gmaxx around anymore and shut off. It works with the castle link but nothing when plugged in, dead bec ? Poor guy almost lived a year. V2 and V3's running fine

yeah, sounds like a dead BEC. The Castle Link powers the brains when connected, so it makes sense that it works when plugged in.

pay attention to your fan. I just experienced a overheat shut down, after getting the truggy back to the pit I found the fan was dead. Offroad dirt are too cruel to the ESC.

Did you check the switch?

Yes...tried bypassing it.....still nothing. It won't even connect with Castlelink

yeah thats a bummer, a few people on this forum have had a MMM fail myself included. why do we keep running it? cause its fricken awsome when it works! also where is your esc in the car? is it on the chassis or some where else? i run an rc8 and have found my MMM's like it more low in the car on the chassis. the guys at the local track all run the novak stuff. partly due to the small indoor track and influence by the factory guys. since i have been racing there over the past month ALOT more MMM combos are showing up. dont give up jzemaxx, castle cares about its customers.

What was your reason to switch to an external bec. Maybe it's just me, but it seems like you would increase the possibility of failure buy using one, when you don't have to.

Run times.....A-mains can be up to 30 mins.

Just had my MMM die on me as well. Its on its way back to CC as well. Mine just went off and that was it. No smoke, no crap. Just off

Pretty cut, thats 2 weeks so far without an ESC :(

jzemaxx,

i just sent back 2 that had the very same problem. :cry::surprised: they seem to go along great, and then all of the sudden they lose power and nothing works. i too tried to bypass the switch, but nothing worked there either.

My lhs just sent 3 systems back for a customer who does mailorder in ST. Thomas that had the very same issue. one was from a 2200 system, one was a standalone V3 and the other was a flux esc....... this is semi- alarming to me as 90% of all my vehicles use 4S-6S and need higher voltage escs.

i just went and bought 3 more back-up MMM systems, and i still have a LT-6S and a 150A EZ-run so hopefully that will hold me up for awhile. :neutral:

Not to sidetrack, but how does the EZrun 150A stack up against the MMM? And is it a sensored ESC?

I haven't tried it yet, (and i hope i don't have to)but it supports sensored and sensorless.....i've heard good things about the esc, but not on the motors.

I am about to send the MMM that blew back and my local LHS will no longer send them back for me....arrgghh. Now he is talking like CC may not warranty it. If they don't I'm done with CC. I will be ditching the MMM once the season of racing is over I can get my hands on the Hobbywing 150. Heard nothing but good things about it, but can't seem to find where they sell them.

BTW: I'll keep you guys posted on whether they warranty it or not. :eyes:

If your local hobby shop is telling you what Castle may or may not do, give them a foot up the ass. Sounds like they are getting tired of helping you spend your money. Just seems silly to put words in Castle's mouth about the matter.

My LHS has been good to me and does me right, but apparently that is what his rep told him. He said that I have to send it in directly from this point on using this link.

http://www.castlecreations.com/support/repairs.html

That is the typical way of warranty service, but Castle will accept it from the retailer too- no matter how many ESCs you have busted.

JZ,

You have a PM.

I had a v2 that went out after 15 minutes and now 2 V3 units that are running great on similar setups on 4S and 5S. Good luck. I'm sure they will warranty them for you. It doesnt sound like you have done anything to warrant them turning you down for repair.

FYI, an external bec will not increase runtimes. The MMM already has a built in switching bec, and an external bec operates the same way.

Ebay :)