Tongsheng TSDZ2 not responding

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Jan 5, 2021
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To anyone who has an understanding of how the TSDZ2 works.....

After a short circuit and a BMS reset I mounted my battery back and the following occured:

1. The motor would not start, nor by throttle, nor by pedal assist.
2. The 48V battery is giving a voltage of 53.6 V, this is also measured at the Andersons connectors red and black, meaning the motor is getting the same voltage. I also checked the connectors entering the motor, remove the dust covers, everything is ok, nothing burned.
3. The VLCD5 is showing the usual indications, BUT:
- the battery level is showing only one bar, whereas the battery is full.
- speed remains zero when bicycle is operated.
- all other functions are OK; NO error message.
4. The battery is accepting discharge (I used a bulb to discharge it to 49V), so we can suspect the BMS is not barring power from being delivered.

I have no idea of how this can be solved and hope someone out there with understanding of the TSDZ2 can help

Thank you,
 
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