How to fix no power and exclamation mark error on an e-bike [ADO D30C]

I am currently in the middle of reviewing the new ADO D30C electric bike. I really like the bike, and it works well for both trail use and as a hybrid/town bike for commuting and leisure.

However, when my sample arrived, I had some problems with the electric motor engaging and an exclamation mark showing on the digital display.

Because this was a review sample shipped from the factory, I didn’t have the same level of support a retail bike would get and had to try and communicate with the Chinese engineers. As helpful as they tried to be, there was a bit of a language barrier.

With a bit of Googling and the help of the engineers, I was able to work out what the problem was and how to fix it. This problem can happen with most/all e-bikes. While my fix won’t work for all people or even most people, it may help point you in the right

Exlamation Mark Error

My main problem with the support I received was that it was never explained to me what the error was, so it felt like I was just doing random things to the bike.

A bit of Googling revealed the exclamation mark pops up when you apply the breaks. This is to indicate that the power to the motor is cut off due to the brakes.

Once I realised this, everything made a lot more sense.

Fixing the exclamation mark error

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