I'm living in northern Italy, and just bought a rather low powered ebike (36v 7.8 aH 250w) by a company located in Turkey called RKS motors. But in my haste to try and do what I could in the short term to make this thing faster, I touched buttons on the controller that gave me a flashing Error 8 on my display. Apparently, this error relates to the PAS, and though I've been trying different button combinations to fix it, none of them seem to work because it starts blinking after making changes to the controller settings. And, that brings me to the controller, which is a MOSFET 6 36v lcd p9 display, and I can't find anyone online actively working with that model display. It seems that it could be just a variation of the popular kt over, but with slightly different programming tweeks. Anyway, I desperately like to reset this thing, because it doesn't save the settings to get the PAS going again. I'm not sure and would like to avoid disconnecting any wires going to the motor if I could. Please help!!!
New and with a PAS problem!
- Thread starter Edwardbooze
- Start date
Just wanted to know if there was something I could do to help my cause for getting some help with my controller issue? Is there a good chance that there's a solution on this site for what I am dealing with, without reading many pages of promising but eventually unworkable or impractical ideas on how to tackle this issue? Just asking because my controller doesn't seem to be one that's widely known or used, and because I am not a mechanic, or an electrician on bicycles. But, I still need to keep an open mind and hope for the best, despite how hard that feels for me to be right now! LOL!
At this point (though it hasn't been that long since I asked for help) I am ready to forgo tweaking my bike, because now I miss having the PAS I had just recently.
But, the fact that I haven't gotten any responses makes me think that my problem doesn't have an easy solution! If that's the case, then should I just buy another display and get someone to put it on?
Or, can someone give me a good search term to use, than what I have been using, so that I can find some help out there for my issue please?
With respect, its a forum, not a tech support helpline..... Be patient. From experience if someone knows the answer they will let you knowEditing question: does anyone know how to correct / change the words that the computer insists on using? When I tried, I couldn't get a keyboard
Right, yes I am sorry. And that's for the tip, man. I'm just feeling a little desperate, but yeah, let me chill!
It's a genereic Chinese controller and LCD. Unfortunately the LCD is not well known, so I can't find a manual for it. It's not from KT, so their error codes or any other LCD's error codes have no relevance.
There's an example of the same controller and LCD here for sale on Ebay. You could ask the seller if they can supply or give a link to the manual, then you can show it here on this forum to help others:
There are very few settings on any LCD that can cause an error code. One would be battery voltage, so if you see the number 24, 36 or 48 in there, check that it matches your battery.
If it's not that, maybe the error is for something else coincidental. Check that your motor connector is in all the way to the line, not just in tight, if you have the standard 9-pin connector. Also check the brake switches are definitely off - maybe disconnect them until you get your problem sorted. Check all the connections at the controller.
If none of that solves anything, you need to do all the basic tests:
1. Measure the voltage at controller's battery connector. Obviously should be battery voltage.
2. Measure the voltage on the 5v rail. You can measure that between any ground (black) and any of the reds going to throttle, PAS or motor halls. obviously, it should be around 5v.
3. Check throttle signal wire, which is the one that's not red or black. Should give about 1v to 4v when you twist the throttle. If there's more than one wire, your meter will find it. It's the one that's between 1v and 4v, assuming that it works.
4. Check that the PAS is pulsing. Measure the PAS signal wire while turning the pedals slowly. Should pulse 5v on and off every time a magnet passes the sensor. The signal wire is the one that's not red or black.
5. Check the motor hall signal wires (blue green and yellow) on the connector at the controller. They should each pulse with 5v going on and off as you rotate the wheel BACKWARDS.
If your bike passes all those tests, it will work. The test that it doesn't pass shows where the problem is.
There's an example of the same controller and LCD here for sale on Ebay. You could ask the seller if they can supply or give a link to the manual, then you can show it here on this forum to help others:
Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle | eBay
Find many great new & used options and get the best deals for Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle at the best online prices at eBay! Free delivery for many products!
www.ebay.co.uk
There are very few settings on any LCD that can cause an error code. One would be battery voltage, so if you see the number 24, 36 or 48 in there, check that it matches your battery.
If it's not that, maybe the error is for something else coincidental. Check that your motor connector is in all the way to the line, not just in tight, if you have the standard 9-pin connector. Also check the brake switches are definitely off - maybe disconnect them until you get your problem sorted. Check all the connections at the controller.
If none of that solves anything, you need to do all the basic tests:
1. Measure the voltage at controller's battery connector. Obviously should be battery voltage.
2. Measure the voltage on the 5v rail. You can measure that between any ground (black) and any of the reds going to throttle, PAS or motor halls. obviously, it should be around 5v.
3. Check throttle signal wire, which is the one that's not red or black. Should give about 1v to 4v when you twist the throttle. If there's more than one wire, your meter will find it. It's the one that's between 1v and 4v, assuming that it works.
4. Check that the PAS is pulsing. Measure the PAS signal wire while turning the pedals slowly. Should pulse 5v on and off every time a magnet passes the sensor. The signal wire is the one that's not red or black.
5. Check the motor hall signal wires (blue green and yellow) on the connector at the controller. They should each pulse with 5v going on and off as you rotate the wheel BACKWARDS.
If your bike passes all those tests, it will work. The test that it doesn't pass shows where the problem is.
It's a genereic Chinese controller and LCD. Unfortunately the LCD is not well known, so I can't find a manual for it. It's not from KT, so their error codes or any other LCD's error codes have no relevance.
There's an example of the same controller and LCD here for sale on Ebay. You could ask the seller if they can supply or give a link to the manual, then you can show it here on this forum to help others:
Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle | eBay
Find many great new & used options and get the best deals for Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle at the best online prices at eBay! Free delivery for many products!www.ebay.co.uk
There are very few settings on any LCD that can cause an error code. One would be battery voltage, so if you see the number 24, 36 or 48 in there, check that it matches your battery.
If it's not that, maybe the error is for something else coincidental. Check that your motor connector is in all the way to the line, not just in tight, if you have the standard 9-pin connector. Also check the brake switches are definitely off - maybe disconnect them until you get your problem sorted. Check all the connections at the controller.
If none of that solves anything, you need to do all the basic tests:
1. Measure the voltage at controller's battery connector. Obviously should be battery voltage.
2. Measure the voltage on the 5v rail. You can measure that between any ground (black) and any of the reds going to throttle, PAS or motor halls. obviously, it should be around 5v.
3. Check throttle signal wire, which is the one that's not red or black. Should give about 1v to 4v when you twist the throttle. If there's more than one wire, your meter will find it. It's the one that's between 1v and 4v, assuming that it works.
4. Check that the PAS is pulsing. Measure the PAS signal wire while turning the pedals slowly. Should pulse 5v on and off every time a magnet passes the sensor. The signal wire is the one that's not red or black.
5. Check the motor hall signal wires (blue green and yellow) on the connector at the controller. They should each pulse with 5v going on and off as you rotate the wheel BACKWARDS.
If your bike passes all those tests, it will work. The test that it doesn't pass shows where the problem is.
I have a draft of an email, but I haven't sent it out yet.
Update:
Hi There!
Thanks for the suggestion. I did just try writing their customer service team in Europe, but I can't get their site to open in order to send it off. I'll keep trying, but it seems that they're not an option right now.
It's a genereic Chinese controller and LCD. Unfortunately the LCD is not well known, so I can't find a manual for it. It's not from KT, so their error codes or any other LCD's error codes have no relevance.
There's an example of the same controller and LCD here for sale on Ebay. You could ask the seller if they can supply or give a link to the manual, then you can show it here on this forum to help others:
Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle | eBay
Find many great new & used options and get the best deals for Brushless Motor Controller LCD Display Kit for Electric Scooter Folding Bicycle at the best online prices at eBay! Free delivery for many products!www.ebay.co.uk
There are very few settings on any LCD that can cause an error code. One would be battery voltage, so if you see the number 24, 36 or 48 in there, check that it matches your battery.
If it's not that, maybe the error is for something else coincidental. Check that your motor connector is in all the way to the line, not just in tight, if you have the standard 9-pin connector. Also check the brake switches are definitely off - maybe disconnect them until you get your problem sorted. Check all the connections at the controller.
If none of that solves anything, you need to do all the basic tests:
1. Measure the voltage at controller's battery connector. Obviously should be battery voltage.
2. Measure the voltage on the 5v rail. You can measure that between any ground (black) and any of the reds going to throttle, PAS or motor halls. obviously, it should be around 5v.
3. Check throttle signal wire, which is the one that's not red or black. Should give about 1v to 4v when you twist the throttle. If there's more than one wire, your meter will find it. It's the one that's between 1v and 4v, assuming that it works.
4. Check that the PAS is pulsing. Measure the PAS signal wire while turning the pedals slowly. Should pulse 5v on and off every time a magnet passes the sensor. The signal wire is the one that's not red or black.
5. Check the motor hall signal wires (blue green and yellow) on the connector at the controller. They should each pulse with 5v going on and off as you rotate the wheel BACKWARDS.
If your bike passes all those tests, it will work. The test that it doesn't pass shows where the problem is.
Do you think that it would be easier to just buy the ebay controller and just start from scratch?
Which bike is it https://www.rksmotor.com.tr/products/foldable-bikes.html
Most shown on the site are fitted with a KT controller?????
I didn't know if you got my question, but I now used your highlighted name to ask:
Do you think it better for me to buy that ebay controller, and just start afresh? I ask, because I don't know how likely it is for me to fix, unless I disconnect this controller?
Do you think it better for me to buy that ebay controller, and just start afresh? I ask, because I don't know how likely it is for me to fix, unless I disconnect this controller?
I'm not sure if it is a kt,lcd because it reacts slightly differently to the button combinations that I followed from folks working on the kt controllers on YouTube.
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