Uh, the haul back home must have been a challenge
The display doesn't lit at all ?
You said you could hear it spinning but the chainring remained still ? The 3-pawl clutch could be toast. That or the the one-way bearing inside the 2nd reduction gear (09-G). You will have to open it up to really know...
I have done a complete teardown of the motor (except the rotor which I'm still wondering how to remove) and the gears are extremely easy to replace. Much more than on BBSxx series. See this video
Also, if the sticker of your motor says V1.5 it has the steel gear.
FYI, here all the gear refs from V1.5:
Thanks for your help Ivanovitch_k, I truly appreciate it.
At first I thought (hoped) the motor had overheated and had temporarily disengaged. Every 10km or so I'd re-start it. The display would come on, but just a noise from the motor and no propulsion. When I got home I was not in good shape, but once I'd recovered I thought I'd make a quick video to demonstrate what was happening and the noise it was making.
When I tried to switch it on, nothing. Not even the basic green battery light (on the actual battery) illuminated, which I thought was weird. So I plugged in the charger. The light turned red but no fan noise from the charger, just a single click. So I removed the battery and plugged in the charger again. This time it started to charge as per normal. Whilst it was charging I reinserted the battery and it cut out again.
I guess it must be some sort of safety cut-out kicking in.
With regards to the way forward, although I really do appreciate your helpful advice, this is a 3000€ 4 month old bike. I'm expecting that FREY will not ask me to start dismantling the motor and replace any of the innards. Definitely not my forte.
Anyway, we will see how they respond.
In the meantime, I guess I'll just have to get the stand up paddle board inflated