Help! My pedal assist bike the screen off 790 is flashing with L-h one off the bar and then the mode start flashing from low med and high

Nealh

Esteemed Pedelecer
Aug 7, 2014
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West Sx RH
One needs to say under what circumstances the fault occurred.

The threee LED's means there is conflict between controller and display , reason's'
can be many.
Could be a 5v fault on the 5v rail , 5v rail supplies power to PAS sensor , throttle , brakes and motor Hall's.
Wire fault .
Moisture ingress.
 
Last edited:

Cainhilton02020

Finding my (electric) wheels
Feb 10, 2025
8
0
What does that mean sorry I’ve bought the bike off a friend and it working all fine until today could tell me what I can do to fix it or what does it mean
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,096
8,625
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West Sx RH
Something must have happened to the bike , you need to tell us what is is however trivial.
Faults don't often occur on their own wthout an event occurring.
Did you leave it out in the rain ?
Did it fall over or you fell off ?
Did the chain fall off ?
 

Cainhilton02020

Finding my (electric) wheels
Feb 10, 2025
8
0
Something must have happened to the bike , you need to tell us what is is however trivial.
Faults don't often occur on their own wthout an event occurring.
Did you leave it out in the rain ?
Did it fall over or you fell off ?
Did the chain fall off ?
Something must have happened to the bike , you need to tell us what is is however trivial.
Faults don't often occur on their own wthout an event occurring.
Did you leave it out in the rain ?
Did it fall over or you fell off ?
Did the chain fall off ?
The chain fell off the other day I put back on and when I took it to work it was under shelter put some rain drops was on it and I’ve not fallen off it
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,096
8,625
61
West Sx RH
The chain fell off the other day I put back on and when I took it to work it was under shelter put some rain drops was on it and I’ve not fallen off it
Was it working after this occurred ?
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,096
8,625
61
West Sx RH
The bikes electrical system needs testing to try and find the fault , it is possible that a controller short has occured.

Sometimes those LED displays can suffer moisture ingrees causing a PCB short within .
 

Nealh

Esteemed Pedelecer
Aug 7, 2014
21,096
8,625
61
West Sx RH
One needs a digital voltmeter for testing cost is about £10.
Also we need to see which type of controller connectors are used, the controller ali bo x is located in the compartment at the front of the battery.
 

Cainhilton02020

Finding my (electric) wheels
Feb 10, 2025
8
0
One needs a digital voltmeter for testing cost is about £10.
Also we need to see which type of controller connectors are used, the controller ali bo x is located in the compartment at the front of the battery.
And what do I do after I get it tested and stuff does this see if there problem with the controller
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
7,399
3,421
Telford
The flashing sequence indicates the error code. Can you please explain in actual English what the flashing sequence is when you switch it on. If English isn't your language, can you get a friend to write it down?
 

saneagle

Esteemed Pedelecer
Oct 10, 2010
7,399
3,421
Telford
In the meantime, follow the wires that come out of the brake levers until you come to their connectors. Disconnect them and see if that fixes it.