In this video i will show how to fix Error 21 of the Max.
Error 21 create a real pain...you can hide it in CFW generator ( Level 2 ) but the error, will still be there...and it doesn't allow:
1. To be able to see the "bricks" (▪︎▪︎▪︎▪︎▪︎)
or percent % of the battery.
2. And the most annoying one...is the Cut-off current wehn driving at full throttle.
I wasn't able to drive more than 25km/h without cut-off.
When I got more than 25km/h after 50 meters my scooter stopped. And after some seconds I was able to turn it on again.
● First check ✔ the connection wires between controller and battery!
If that doesn't help, you have to watch this video.
You will know how to change Ninebot MaxG30/D BMS after watching this video.
