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Electric EZGO Electric EZ GO Marathon, Medalist, TXT and RXV. |
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05-31-2020, 08:14 PM | #1 |
Getting Wild
Join Date: Jan 2020
Location: Indiana
Posts: 139
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RXV Navitas Tac 2.0 Problem
I know I’m probably gonna get some greif from some, but that’s okay.
I just installed a Navitas Tac 2.0 into a 2011 RXV W/Danaher that also has been converted to Nissan Leaf lithium battery at 48V. Full charge was 57.4V and it was reading ~57 when this happened. It ran fine for 3 weeks. Charged it up last night and took it out this afternoon. Going downhill the controller started rapidly cycling the solenoid and as I tried to stop it would lock the brakes as soon as I pushed the pedal. Once stopped it would not move. Checked the app and had Low DC Bus. After a couple of minutes I heard the solenoid and was able to drive again. Went back toward home and it did it again on a very slight downhill grade. This time I noticed that the current draw was still 115 amps or so without using the accelerator and the regen should have stopped. I shut it down and could not get a reset. There is evidence of resistor being extremely hot as it melted some rubber backed carpet that was an inch or so away. Went through the steps for Error code 2-3 in the manual and found that when reconnected the resistor control wire (last wire to reconnect) to the terminal on the controller, the error came back. The solenoid will not engage. Checked all wiring and found no shorts or loose connections. However with the resistor connected to the controller I have ~o ohms between it and B- or B+ and the same between B- and B+. When I disconnect the resistor wire I have 1.25 k ohms between B- And B+ on the controller. Resistor measures .4 ohms across and the solenoid measures 104 ohms across the little posts. (36V Trombetta- Pic Incuded) The speed was set at 60%(20), regen braking at 30% and the acceleration at 70%. I checked the BMS and had no HV/LV shutdown. According to the manual, the check led to the resistor, but .4 ohms is good. Can it still be bad? Also the 115 amp draw when it should have been zero is sort of pointing at the controller, I think. Any insight is appreciated. |
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03-27-2022, 04:41 PM | #2 | |
Not Yet Wild
Join Date: Jul 2020
Posts: 9
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Re: RXV Navitas Tac 2.0 Problem
Quote:
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03-28-2022, 11:25 AM | #3 |
Gone Wild
Join Date: Apr 2019
Location: Canada
Posts: 425
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Re: RXV Navitas Tac 2.0 Problem
Best to call Navitas support on this one.
Some recommendations though: 1. Double of your resistor coil or put on a much larger break resistor setup on. 2. Don't fully charge your battery and leave room for regen braking. 3. Put a Gigavac 400a or better contactor on. RXV + Lithium requires some considerations. |
03-30-2022, 04:57 PM | #4 | |
Gone Wild
Join Date: Jan 2013
Location: Saint Petersburg, FL
Posts: 2,089
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Re: RXV Navitas Tac 2.0 Problem
Quote:
That's my guess. |
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04-18-2022, 08:41 AM | #5 | |
Not Yet Wild
Join Date: Jun 2015
Posts: 46
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Re: RXV Navitas Tac 2.0 Problem
Quote:
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04-26-2022, 05:28 PM | #6 |
Not Yet Wild
Join Date: Apr 2020
Location: Texas
Posts: 7
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Re: RXV Navitas Tac 2.0 Problem
If you add another resistor for 2 total do you wire it on series or parallel?
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Tags |
controller, navitas, problem, rxv |
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