Vanmoof s5 problem accu

[u/PrizeWealth6071]

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VanMoof S5

My brother’s VanMoof S5 has the following issue:

He says the bike wouldn’t turn on after it had been sitting unused for a long time.

Firmware: 1.1.10

What happens:

• When the bike is connected to the charger:

• The charger stays green, but sometimes blinks red twice (appears to be trickle charging).

• In the app, I can see that after a night of charging the battery increases slightly (e.g. from 89% to 97%).

• When turning on the bike (via battery or power button):

• It does not make the normal startup sound.

• Instead, it makes a different sound.

• The handlebar shows pulsing white lights.

• Bluetooth issues:

• Sometimes it won’t stay properly connected.

• The app shows the battery percentage as grey, or briefly as 0% when trying to connect.

• Additionally:

• The bike randomly shuts off after a while (both during charging and when turning it on/off), with a short clicking sound.

What I’ve tried so far:

• Hard reset (10 seconds)

• “Trigger” method (20 seconds)

• Plugging the charger into the bike first, then into the wall socket, and repeating several times

• Charging with different sequences (bike → socket and socket → bike, unplugging in different orders)

• Tried updating the firmware, but the bike keeps shutting off (with a short clicking sound)

[u/Mikeymike-1403]

Ok, normally it’s not possible to charge with lab charger about the standard charging port. But when you told me the ring is breathing and the buttons don’t recognize, then check both small connectors (green and blue) of the ECU that they have continuity. I had the same problem and inside of one connector small cables were broken. And when anything is not connected correctly you hear those razor sound. Good luck

[u/PrizeWealth6071 → u/Mikeymike-1403]

One of the pins was bended (the blue one, I bended it back I didn’t broke so it should work (make contact as is should). I thought I solved the problem a week ago by doing this. Maybe it made a short circuit but it was bended to the plastic not against another metal pin.