Does anyone have any idea what’s wrong I’ve tested the battery 41.2v on full charge tried a different controller and display 
Help! Breakdown
- Thread starter Cycleformiles
- Start date
Bigstone C500 09 error is comm,s .
If one has changed controller and display then suspect the trunk cable between to be faulty.
If one has changed controller and display then suspect the trunk cable between to be faulty.
If you can tell us how it started, it might give us a clue as to where to look. If I were to guess, I'd say that you have a shorted MOSFET or damaged motor cable.
Is the motor cable connector in all the way to the line? 1mm short can cause that problem.
After going up the hill by about 15yards then it seemed the lcd had a burn mark on it the controller was extremely hot but I’ve replaced both and the system will not come on
If the controller got very hot and the lcd showed a burn mark , then controller can be damaged by overcurrent. The fact the controller got very hot suggests one was riding likely too slowly up hill thus causing high current which will turn into heat.
One should try and continuity check the trunk cable form the controller to the display .
One should try and continuity check the trunk cable form the controller to the display .
Based on 10 miles ridden on the wheel comment, and the film on the lcd still?? If a new Yose-power kit, contact support, allow an extra day or so for time zone differences and keep it simple for translation s/w but you should get a fault finding set of instructions and photo requests probably starting with ensuring everything is fully pushed home up to the indicating line on all plugs/sockets especially motor and controller. (try sending such pics with email #1)
My initial fitting issue was successfully assessed by support, and i recall reading a post in here with a controller was
promptly replaced. - But you will be dealng with Chinese (probably?) support staff
Failing to power on with replacement controller/display???? - Rather than drop the odd detail here and there perhaps provide the full story because a working controller/display used to test/replace your faulty ? devices would indicate battery? bms? or cable /connection or fuse issues..
My initial fitting issue was successfully assessed by support, and i recall reading a post in here with a controller was
promptly replaced. - But you will be dealng with Chinese (probably?) support staff
Failing to power on with replacement controller/display???? - Rather than drop the odd detail here and there perhaps provide the full story because a working controller/display used to test/replace your faulty ? devices would indicate battery? bms? or cable /connection or fuse issues..
I have replaced fuses in battery checked all connection including replacing 4-1 cable so leaves me with bms, I’ve tested battery measured 42 on a full charge but unable to test whilst connected, so I’m guessing bms will need replacing
It's probably a good idea to start from the beginning. All we have are a few snippets of information. It's impossible to figure out what you started with, what went wrong and what you have now. I can see all sorts of reasons why your stuff is not working.
1. What controller and LCD were originally working on the bike?
2. What controller and LCD did you replace then with?
3. Which controller and LCD are you playing with now?
4. Which motor do you have and what's its max speed off the ground?
It's virtually impossible to burn an LCD without breaking it first. If indeed it was burnt, the only thing I can think of that would do it is if you pulled the live wire off and it shorted, but I can't see how that would happen when riding unless it was a bad installation pulling the wire when you steer.
Controller getting hot when going up a hill is nothing to worry about, but that's if you were going slowly. The faster you go, the cooler it runs, and it should never get hot at 15 mph unless your motor is too fast for its power.
Your 09 error denotes a mismatch between your controller and LCD, or the controller has been destroyed.
Original display was dashi C500 display and Lishui Controller 36v. I replaced them individually for the same models to ensure compatibility, and still got the same behaviour I also replaced the cable that runs between controller and display. The same error 09 comes up, I removed the throttle and brake sensors and pas sensor to see if there was an isolated problem and even with just the display and controller connected it displays the same, I also replaced the fuses in the battery to see if that would help, I have tested the voltage and it reads 42v on a full charge, as the battery connectors are JST Bullet types I can’t test the current when connected to the controller, as I could tell if an immediate drop in voltage on attempting to turn on. Where the BMS reads 00.9 its has normally been around the 38.3 mark ish. On the replacement display I have it reads out the trip mark as zero, so the displays memory is fine
Last edited: