MMM Dead-Alive-Dead-Alive - RC-Monster Forums

Shark413 · **MMM Dead-Alive-Dead-Alive -** 09.08.2008, 04:07 AM

Got a Monster Max V2 a few weeks back and was going to put it in my ST-RR conversion. I have a MM in there now and it has working fine so I was in no hurry to replace it, and wanted to see how everybody else V2's were working out. Well I finally decided to hook it up and see how it worked. Running a Kyosho ST-RR converted to brushless, Neu 1515/1Y/F on 4s lipo. I hooked it up using an external BEC and removed the red wire from the MMM. Hooked up my PC and set it mostly with defaults with the LVC at 12v. Plugged in the battery and flipped the switch, calibrated and got the correct ring tones. I hit the throttle and nothing. My brand new MMM was dead. I reprogrammed the LVC to "None" and the Monster fired up. Hmmm seems to be a problem with the software. I decided to go to the CC site and see if there were any updates, there was so I downloaded it and reset the LVC to 12v. The Monster powered up and seemed to be working ok, the MMM was alive. Today I took it out on the track to see how it would hold up, took two warm-up laps and then started to get up to speed. On lap four my truggy stopped dead. Brought it in and it was glitching bad, oh no my MMM was dead again. Took a quick look, nothing was hot, no burning smells, no loose wires. I decided to call it a day and reinstalled my MM. Later when I got back home I decided to look at the MMM. From previous experience this type of glitching was related to a loose/broken wire. I checked the power wires, then moved to the three motor wires, I tugged on the white wire and it fell off, cold solder joint? So I resoldered the wire and the MMM was alive again. Took a few laps around the yard with no issues.

joeling · 09.08.2008, 04:28 AM

Good detective work ! Now go & punish it to the max please

Regards,
Joe Ling

GT35R · 09.08.2008, 05:02 AM

Thats great you found something you could fix, I bet you were happy with that.

A Phoenix 25 sent my Funjet into the ocean with the same issue - the wire just popped off. Only time an air esc has let me down.

I'm glad CC don't make airbags.

MTBikerTim · 09.08.2008, 09:03 AM

I hope that's not what was wrong with my MMMv2 (LVC). Have they put out an update for the MMMv2 already?

TexasSP · 09.08.2008, 01:54 PM

Seems like the insulation needs to be cut back some more so the wire fits deeper into the connector. Could very well explain why the MMM's keep failing on big jumps. I had this happen before with nimh batteries where a battery bar came loose but would sometimes make contact. I beat myself to death trying to fine a problem before I cam across the broken bar. The batteries were held together so well by epoxy that it was only noticeable upon close inspection.

Shark413 · 09.08.2008, 05:01 PM

TexasSP, I agree the wire seemed a little short for the plug. I make it a point to check the wiring just for that reason (loose connection as well as to see how far the solder wicked up the wire). But it felt fine initially, I guess it was barely soldered in or just the flux was holding it.

GT35R, your right about that. I almost had a cow when it came to a dead stop after 3 laps. I hope that is the last of my probrems, the MMM is really a nice ESC.