Have you disconnected aux battery lately to reset everything?
I think you did this previous. Can’t find other reset info.
The sevcon blink codes are reset by cycling the key. Does it fault immediately with key on?
It would be interesting to now how sevcon acts with the can disconnected. P16 and P27
I can connect an oem controller, to power only, see if it faults by itself, with no communication to other devices.
So testing those wires I got 1.10V and .55V Which seems to be good. And they went up when I pressed the pedal so it seems to be working fine.
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I just disconnect the aux battery for about a minute. No changes.
The Sevcon does fault immediately with the key on. Where are p16 and p27 located?
Also I changed some settings in the charge controller and got the SOC to show full charge but now I’m noticing that with the 48v disconnected my SOC meter is still showing full. It does go down if I leave the vehicle on. Is that charge level just coming from the aux battery?
On sevcon.
What do you mean change charge control? This is new to me. Something is programable in the Gem?
The delta-q Quiq controller. You can change the settings in it to better charge the type of batteries in the vehicle
I just had a thought, not sure if it’s logical but could the fact that the batteries I have in this thing are 800cca batteries be too high of CCAs? They’re 50ah each
It should at least run on the little batteries.
I don’t think it wise to change delta q profiles in the new Gems, as they are set by the gem bmc and in Polaris wrench.
It will probably cause a fault. Are you sure you are back where you started with the charger?
Are you using a programmer or the bump method?
The bump method, I’m using the manual that’s for the specific chargers in GEM vehicles which says that you should change the settings if you change the batteries.
I believe that is for classic Gems. The post 2016 are completely different. Polaris uses their own battery management controller.
I wasn’t aware the new sw supported bumping. Good to know if it works.
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Ok, so I have determined that the motor is good. I went back to look at the fault code for the Sevcon. Based on the fault code, the manual is essentially saying that the analogue input or output readings to and from the Sevcon are not what they should be, I already tested the accelerator pedal. so I know it isn’t that analogue input. But in order for me to figure out more, I need to know which wires are going into and out of the Sevcon as analogue input/outputs as well as what the tolerance for each analogue input/output is supposed to be.
Sevcon controller in the gem does not use analog inputs and the only output is to the contactor coil.
Okay I see, I reached out to Sevcon and based on the blinks on the controller they told me I had a “code 8FF” which if you look at chapter 7 in that manual I linked above, it says there is a temperature problem in either the motor or the controller.
Aha, good information. I’m surprised that they were helpful with Polaris gear.
Controller is unlikely, but motor sensor should be easy to test.
I can compare your ambient ohm reading and voltage to mine.
Do you have the 5kw motor?
Yes I have the 5kw motor. I tried to test for continuity/ohms in the motors thermal sensor but there was no continuity in it.
I’m sure that’s wrong.
Let me test one.
600 ohms at room temperature.
Ok I got a better multimeter and it read .629
k-ohms at about 80 degrees
Well darn, thought you had it.
Without a dealer or something to swap parts with I don’t know what else to do.
Post on fb or some other forums maybe.
I got nothing!
Is it possible you or the dealer misread the error code? Is there another way you can check?
I believe the problem is in the controller itself, after all there was corrosion on the circuit board. I found another Sevcon Gen4 48v 450A (same specs as mine) controller online that I’m thinking of buying, the only problem is that the part number is slightly different. my controllers p/n is 634a44410 the one for sale is 634a44126, they also look identical, would the new controller work on my vehicle?
The controller will not work unless it comes from Polaris or came out of a GEM to begin with.
The programming is proprietary to Polaris.