hv is cutting out

little help,im running a X1CRT,novakHV,6.5,5000 35c 2sX2,11/62 gearing,spectrum pro rx,hs5955tg servo,novak glitch buster.My temps have been running ,motor156deg,ESC147deg,batteries97deg,deans ultras107deg. these are max temps after a full run of nine or ten minutes. My latest problem is the system has started to quit / glitch momentarily very early in the run ,hense the glitch buster.Its acting exactly like the lipo cutoff and it starts right back up,like the lipo cutoff. I pull it and recharge and the packs are only taking13 or1400ma. I cant find anything wrong mechanicaly or electricly accept my glitch buster was dented up so replaced it tonight and i do have two other dsm rx's so i might change that out but im running out of idea's , patients and money any thoughts out there

Have you checked the cap?

[BrianG]

Sounds like he replaced the cap already, but not clear if he's tested the setup since.

Glitching could be a number of things, but since the setup has been running fine for a while, I would start looking at connectors. They do wear out, get dirty, get pitted (from the contact arc), etc. If they are degraded enough, they could be introducing resistance which would cause the LVC to kick in much sooner (higher resistance = voltage drop when current flows, making less voltage appear at the ESC).

Glitching could also be a radio issue, BEC voltage too low, or some electronic failure. If the cap is new and the connectors look good, you'll probably need to do more troubleshooting to isolate the real problem.

Unless I'm mistaken, the glitchbuster is a cap that plugs into your receiver. Not the one on the ESC.

hi folks, i havent had a chance to do a functions test yet, the cap is new on one of the remanned system i just got, so im gonna give the power cap the benefit of the dout.the 6.5 is also remanned new maybe 15 passes on it.The batts have only 30 or so passes on them allthough the positive plugs on my reedy 5000 35c's do show some heat distortion do to an atttempt to run hv 4.5 2s on my lxe witch i abandoned after the first race because of the distortion. the Rx is one of the three spares i have that have been back to spectrum because of earlier failures and this is its first duty since coming back from spectrum. The servo is one ive had for a wile but worked great in the Truggy on Gas.Im fairly sure that as before the glitch buster was added the Rx is going dark" On throtle" altough not as quickly as it was before the glitch buster was added.I am just about done with HV unless i work it out soon

[NovakTwo]

If you email tech@teamnovak.com, John can help you trouble-shoot your installation and set-up.

Originally Posted by Doug Shelp

hi folks, i havent had a chance to do a functions test yet, the cap is new on one of the remanned system i just got, so im gonna give the power cap the benefit of the dout.the 6.5 is also remanned new maybe 15 passes on it.The batts have only 30 or so passes on them allthough the positive plugs on my reedy 5000 35c's do show some heat distortion do to an atttempt to run hv 4.5 2s on my lxe witch i abandoned after the first race because of the distortion. the Rx is one of the three spares i have that have been back to spectrum because of earlier failures and this is its first duty since coming back from spectrum. The servo is one ive had for a wile but worked great in the Truggy on Gas.Im fairly sure that as before the glitch buster was added the Rx is going dark" On throtle" altough not as quickly as it was before the glitch buster was added.I am just about done with HV unless i work it out soon

[BrianG]

Originally Posted by asheck

Unless I'm mistaken, the glitchbuster is a cap that plugs into your receiver. Not the one on the ESC.

Yeah, that's what I thought he was talking about, an Rx cap...

Originally Posted by Doug Shelp

hi folks, i havent had a chance to do a functions test yet, the cap is new on one of the remanned system i just got, so im gonna give the power cap the benefit of the dout.the 6.5 is also remanned new maybe 15 passes on it.The batts have only 30 or so passes on them allthough the positive plugs on my reedy 5000 35c's do show some heat distortion do to an atttempt to run hv 4.5 2s on my lxe witch i abandoned after the first race because of the distortion. the Rx is one of the three spares i have that have been back to spectrum because of earlier failures and this is its first duty since coming back from spectrum. The servo is one ive had for a wile but worked great in the Truggy on Gas.Im fairly sure that as before the glitch buster was added the Rx is going dark" On throtle" altough not as quickly as it was before the glitch buster was added.I am just about done with HV unless i work it out soon

You said you have a potentially bad connector. I would definitely replace it and carefully inspect all other connectors. A single weak spot could anywhere in the power delivery chain will cause problems. A poor contact introduces contact resistance, and when current flows through it, it creates a voltage drop, which means the ESC is seeing less voltage. Example, 50A running though a connector with even 0.1 ohms of resistance will drop 5v. So, instead of the ESC seeing 14.8v, it is only getting 9.8v. That alone could cause all your problems.

If the rx is still going dark, it is essentially shutting down momentarily. When this happens, you will have no control momentarily. This could be caused by a weak BEC, battery voltage dropping enough so the BEC can't output enough voltage to keep the BEC going, or maybe even a "noisy" BEC line. The easiest way to test this would be to temporarily use a receiver pack to power the rx and servo(s). Just don't forget to pull the red wire from the throttle connector when you do this.

Also, if the servo is going bad for some reason or is being stalled because of mechanical limits, it could be pulling too much current causing the BEC to go into overload protection. Maybe try a different servo temporarily (doesn't matter what size, it's just temporary).

Since you say this is happening on throttle only, I would suspect the BEC and/or the battery voltage dropping too low. Don't forget, the HV system taps into only one pack to supply the BEC, and the BEC needs a voltage level a little higher than it's rating (dropout voltage), so if the 2s pack drops too much, the BEC output drops even more.

[JThiessen]

Originally Posted by Doug Shelp

little help,im running a X1CRT,novakHV,6.5,5000 35c 2sX2,

Are you running two packs? Most of the people that have had this issue were set up with one pack.
Try switching out your servo for a lower power one - high power servos have been know to temporarily kill the HV systems. The other potential is that its your LVC prematurely kicking in - another known HV problem. I went around the block on this same issue - only resolution that worked in my situation was a change in mfgr.

[BrianG]

According to that part you quoted, he's running dual 2s packs: "2sX2"

[JThiessen]

Yeah - I just wanted to verify. Like I said - almost every one of the situations like this that I have seen have been on a single pack set up.

first thanks to all the contributors i do thank you.To answer the # of packs i am running 2sx2=4s.So i went to the track and ran tree packs, the new glitch buster was a partial sucsess in that it allowed me to get 5 or 6 min of run time before it would " lipo cut off".In the first recharge the packs were only accepting 2800/2900ma on the first run and then i had to gear down because the pinion failed and the temps were 156mtr ,151esc, 97 batts.The next two runs the batts only accepted 2200ma and the temps came way down to mtr 131,esc117,batts85 and the pop,speed and run time till it quit were about the same so it seems to like the 9/62 gear.i dont want to run an external BEC, i have one but last time i ran one it caused a cogg and Bob novak himself had no answers so i think the next thing i want to try is pull the red wire from the signal harness and try an rx pack.I think its quiting when the 4s packs have dicharged to a point they cant supply enough amps too the rx and servo or the BEC is overheating either way it should be the ticket unless you know this to be incorect.I do hate hanging bandaids off my stuff Butt $ are pretty short

[JThiessen]

We tried the Rx pack and it didn't exactly help. His would do the shut off thing all the time, then after putting on the Rx pack, it would run for 5 minutes then hit the LVC. If you do it, be sure to read the latest instructions (they have them on the website), as there is an arming process needed with the on-off switches.

first of all apparently my biggest problem with the HV is that i own two of these turds! I called the tech line today and as usual they were polite and realy tried to be helpfull but didnt realy have any cures for my ills.they suggested undoing the red signal wire and see if that helped, it didnt initialize,then i left the red wire off and rigged the rx pack turned on the tx,plugged in the rx pack and flipped the switch and it fired right up and ran for about 3min.its a shame cause ive had such great luck with my GT7, four plus years and then on too brushless for over two year with a GTB and never had any probs with them.Im done and thanks again for the ideas