S-KU95 controller help

[Nealh]

So if I ordered from aliexpress would that controller come with the same connections . Also when you say the SOxx series are you meaning any controller that starts with SO , sorry if I'm asking stupid questions, I just want to be sure i get it right this time.

Yes, the KU & S0 series of controllers are made by Kunteng as are the KT from Aliexp.

Before ordering just double check as I said in #80.
Also I do wonder if your throttle hall is done for.

 

[Nealh]

You can easily test the throttle, power up and with throttle connected probe the gnd & red at the connector.
You should see 4 - 5v.
Next check between gnd & signal wire (other colour wire white?), you should see 1v. Next with probes still on the gnd and signal open throttle up full and you should get 4v, if not hall is no good and throttle not working.

 

[Matthew Hutchinson]

Just checked throttle and it's all connected correctly, could it just be a faulty throttle or is that what you meant by throttle hall

 

[Matthew Hutchinson]

You can easily test the throttle, power up and with throttle connected probe the gnd & red at the connector.
You should see 4 - 5v.
Next check between gnd & signal wire (other colour wire white?), you should see 1v. Next with probes still on the gnd and signal open throttle up full and you should get 4v, if not hall is no good and throttle not working.

Just seen, I will do this test tomorrow morning, it would be nice if that was the issue, lot cheaper then a controller

 

[Nealh]

Just seen, I will do this test tomorrow morning, it would be nice if that was the issue, lot cheaper then a controller

I do hope that you find that the throttle is faulty with the test as it should give us an answer, the hall is housed in the throttle and like all hall requires the sensing of a magnet as it comes in range.

I do remember seeing somewhere probably on ES, deleted member d8veh saying that KU controllers throttle gave full power irrelevant of whether pas was is use.

As Jhruk mentioned about throttle only after pas this is the case with China OEM bikes to EU/UK now but don't think it applies to controllers as they sell the same ones to other parts of the world where they don't have our rules/laws.

 

[wheeliepete]

Not sure if that S-KU95 is a KT controller as it only appears to work with the LED810 and none of the KT series LCD's are compatible according to BMS.

 

[Nealh]

KU's are Kunteng but only led or 3 speed compatible.
S0 series are Kunteng lcd compatible.
One is 4 wire and t'other is 5 wire.
Other wise wiring is matched colour wise for brake, pas, throttle and halls. Battery and phase are all standard.

 

[Matthew Hutchinson]

You can easily test the throttle, power up and with throttle connected probe the gnd & red at the connector.
You should see 4 - 5v.
Next check between gnd & signal wire (other colour wire white?), you should see 1v. Next with probes still on the gnd and signal open throttle up full and you should get 4v, if not hall is no good and throttle not working.

We've found, or more like you have, I've just done as I was told, 4.7v in, zero on the throttle signal open or closed so I will order a new throttle today off Amazon, that will be with me tomorrow and fingers crossed it will be sorted.
I assume any throttle will do the job, I can swap connectors no problem, my soldering skills far out weigh my electronics skills from when I use to make electric guitars (their electrics are very simple).

 

[wheeliepete]

Glad to hear you have found the likely problem with your build. It's poss. that the hall in the throttle was damaged with your earlier wiring error, or it could have been DOA. Anyway, hope the new part turns up on time and gets you on the road.

 

[Matthew Hutchinson]

Thanks for your help with this, just wanted to be sure before I ordered is this throttle ok for the job https://www.amazon.co.uk/dp/B0771N5CFS/ref=cm_sw_r_cp_apa_i_2SEnBb4582433

 

[wheeliepete]

Thanks for your help with this, just wanted to be sure before I ordered is this throttle ok for the job https://www.amazon.co.uk/dp/B0771N5CFS/ref=cm_sw_r_cp_apa_i_2SEnBb4582433

Yes, that looks fine, I use those on my bikes, nice and minimal and works left or right mount.

 

[Nealh]

Any 3 wire throttle should work and fingers are crossed.

It was a last minute thought that the possibility was the hall may have been damaged when you shorted the hall wires and may have used the throttle as well.
Matt I hope to see a big or at the start your post after the throttle is fitted and not a .

 

[Matthew Hutchinson]

hoorah its going, loads of power , it isn't 3 speed it's nice smooth acceleration, it's pretty quick only been round garden but it was obvious it will still shift, I was only on quarter throttle lol.
I've still a few issues to iron out, there isn't enough weight on the front wheel so I'm getting a lot of wheel spin but that will be easy to sort plus it will improve as I get use to the throttle sensitivity and the frame I made for attaching it to the wheelchair is slipping so I will have to go get that welded but these are all little jobs the main thing is it moves. Thanks so much to everyone for your help

 

[Nealh]

Brilliant another eventually happy member .
We got there in the end, just case of figuring out what has occurred during installation.

Your old controller will be toast not worth thinking about using that again.

 

[Matthew Hutchinson]

Brilliant another eventually happy member .
We got there in the end, just case of figuring out what has occurred during installation.

Your old controller will be toast not worth thinking about using that again.

I've got a few packets of this https://www.amazon.co.uk/s/?ie=UTF8&keywords=sugru&index=aps&tag=hydrukspg-21&ref=pd_sl_98knoc3cgy_e&adgrpid=53335941495&hvpone=&hvptwo=&hvadid=259148806235&hvpos=1t1&hvnetw=g&hvrand=10911247847742328911&hvqmt=e&hvdev=m&hvdvcmdl=&hvlocint=&hvlocphy=9046300&hvtargid=kwd-296167437100 left over from a previous project and I'm going to use it to waterproof some connections, I was just wandering is there any reason I shouldn't seal where the wire enters the hub?

 

[Nealh]

Sugru may well keep cracking but as in your pic the cable entry goes south and has a nice drip loop so no need at all to seal the cable. Unless you go thru deep water you will not have any issues.

 

[wheeliepete]

The problem with trying to waterproof connectors is that unless it is 100%, all you do is trap water in them, which makes things worse. I've never done so, but I would say adhesive shrink wrap is prob. the best method.
May be a bit overkill on your build, but have you fitted a torque arm on your motor? For what they cost, it's worth considering.

https://www.ebay.co.uk/itm/Torque-Arm-for-e-bike-Heavy-Duty-Stainless-Steel-12x10mm-electric-bikes-ebikes/222689463250

 

[Nealh]

After all your works and perseverance Matt it's worth fitting one T/A, if the forks are steel then you don't need too but for piece of mind one is a good idea.