2008 RXV with Navitas Precharge too fast

[BryanHuf]

I have upgraded the speed controller on my 2008 RXV with the Navitas TAC 2. Watched the videos, Read the posts, And followed each step one by one. Initially the cart ran great for the first few moments. However, once turned it off and restarted I receive the fault: Precharging too fast error
Description:
1)The main contactor may be welded closed
2)Or if a large power regen resistor is installed (RXV only) it is incorrectly connected to the battery side of the main contactor
Disconnect the controller B+ post and/or the controller RES post, turn power off for 10 seconds then on to see if error changes
(2-
I have been troubleshooting this for weeks and can not find a solution. Any insight would be much appreciated. Definitely a novice to this. Maybe a bad resistor?

[Boltfan1]

I had this same issue and switched the location of the two resister wires. I put the one with the red on the Solenoid and the one with the black end on the Controller.

[BryanHuf]

Thanks! I will give that a try tomorrow am and repost. Really appreciate it!

[BryanHuf]

Any chance you can send a pic my wires are different colors and just want to be sure I’m clear.

[Boltfan1]

My cart is a 2106 RXV that had the Curtis Controller. To remove the error message I put the white resistor wire with the red heat shrink wrap on the Solenoid with the B+ wire and the white resistor wire with the black wrap on the "R" connection of the Controller. Hope this make sense.

[Imapled]

Originally Posted by BryanHuf

Watched the videos, Read the posts, And followed each step one by one.

...

I have been troubleshooting this for weeks and can not find a solution. Any insight would be much appreciated. Definitely a novice to this. Maybe a bad resistor?

Did you call Navitas support?

844-576-2499 (Toll-Free)
https://www.navitasvs.com/contact

They have a team of support engineers waiting and willing to help. Customer support is excellent and they will put a highly qualified support engineer on the phone with you and they will help you get it going. No cost to you to use the support team!

As well, if you are on Facebook you can join the Navitas user group and ask there but, they will redirect you to the support team for resolution. The support team @ Navitas handles hundreds of calls a day for installation support and all sorts of questions. Very responsive and excellent service.

[VOZ]

Imapled,

Thanks for your prompt and courteous response!

[BryanHuf]

thanks everyone or the responses. I was unable to resolve the issue and ended up returning the controller (maybe defective?) and had the Danaher controller reprogrammed to 19.5mph. Maybe another attempt, another time.