Hi,
I have a 28" YOSE 36V 350W Rear Motor Kit for Cassette with 36V12.5Ah Battery, the controller integrated in the Hailong battery holder. Bought about 3 weeks ago, from Germany ware house.
Yose was already so kind to send me a new connection cable, but the bike still does not read any speed on the display. I will describe the problem, maybe someone had the same and found out what the cause was. All usual cures are tried, any contact checked with a magnifier.
This is definitely no single fault, but common with the product, so maybe some one already knows it.
Why not a single case? I had another YOSE Kit, 26" rear, fitted to another bike but with another battery (36V/10Ah) and Lishu controller. It had exactly the same fault, in every detail.
(Only exception, the battery ordered separate, but also from YOSE had a clearly diagnosable defect. The parallel cell connections where unreliable, so on minor bumps the voltage dropped during a few seconds from 41 to 36 volts on bumps. The full current did not come from all cells, overloading the remaining ones. It could be restored by tapping on the case.)
OK, now precise fault description: When you start the display, anything seems fine. No fault code. The display even reads speed, for a second, if the wheel moves during the start up process. Also the throttle activated push assist works for a very short time. Then after maybe 5 seconds, the display shows zero (00.0) and none of the speed controlled function works. The throttle is use able as speed control for all power levels, but the low power push assist doesn´t work. The speed limit has no function, too. There is not distance or time measured. The speed limit is very important in the EU!
Another fault: When I cycle with constant speed, assist level 2 about 20 km/h (GPS) after about 1 minute the system switches off (battery fully charged, more than 40 V on display). When I restart it, while still moving, the display shows the actual speed for about a second, but then switches to 00.0 again. I´m pretty sure this is a software problem, directly after assembling the bike the speedometer worked for 2 km, it failed after I set the the speed limit to 25 km/h. I can verify this, as the display shows 2.0 km distance.
Maybe something in the set up is problematic and the displays software has a bug?
My first idea was the speed sensor, which is a Hall type in the hub. Magnet is in place and it works, even only during start up. As I had the same problem twice, I can rule out the controller, they are even different models.
It all boils down to the display, I tried 3 of them! All worked for a short time, until I programmed them.
Is there a reset process? I noted the works setting when I first connected it and tried them later, but nothing changed with the speed.
It seems it shuts down the speed signal, the moment the display reads the memory storing the individual setting. I consider the display is a small computer, starting up, running a diagnosis and then reading the programmed setting last.
What worries me most, the YOSE service people seem to know nothing about the product, they only want you to proof the fault, then you get a spare part. Not one of my question answered, they allwas have to ask someone... I even had to do a video for them.
In my world a service technician knows "his (or her)" product inside out. They have only this one product! Maybe the mentality is quite different from ours.
Anyone an idea?
Display is called "DASHI C500"
