bike seems dead

[markqaz]

hi everyone

a new to ebikes, been dragged into it due to being given one

its a bristol bicycles s'park street model, very well built but not working at all. ive determined that theres power to and inside the controller [identical to one in the forum, which looks like a KT but isn't]

the display is completely dead, the rear hub motor is Panda. have checked wiring connections, there no power there.

the on/of switch on the battery flashes quickly if its held down or couple of seconds, anyone know what it means?, is it significant?

battery is good [Reedition brand], motor is panda. bristol bicycles and panda are no longer in business

is there a way to at least rule out some components, if anyone can help id be very grateful

ta

 

[Slaphappygamer]

The power can be held in the capacitors of the controller. Even if the battery briefly turns on.

I would try to disconnect the controller, from the battery, and power the battery on. Since the battery “flashes quickly”, it could be that there is a wiring (or device) fault that is shutting the battery off. Separating the battery from the controller should help quickly isolate if the issue is the battery or a wiring/device fault. Then the next question would be, what voltage are you reading on the battery alone?

 

[markqaz]

thanks both people. but before i do as people here have very helpfully suggested can anyone tell me how i should be starting the bike up [switching it on]..

i just fully charged batt for first time, i was given bike as not working with no instructions ,

my concerns are:
bike has a key in the batt case, but as i can see it only lets you remove the batt . assuming that the display does NOT need to be live for the bike to run does the key have be removed for the bike to work

the on/off switch is a mystery, if pressed different things happen depending on whats been done previously in the way of operating it, like turning it on, long press or short press

the batt has recently been re built vat great cost, its a tfi li-ion battery in a carrier [for carrying things] with 2 rear lights and 2 switches . i can still measure voltage if required, and disconnect the controller [am not ignoring the advice]

if anyone can tell me, 2 bits of info would help me proceed: does the display need to be live for bike to work and if i turn bike over and turn crank it should i be able to feel the motor kick in [or do i need to ride it]

thanx

 

[Chazmo]

A long press is almost always needed to turn on, markqaz. Hold it down for 5 seconds and then release it. And, yes, the display needs to be awake / alive for your bike to work. It communicates with the bike’s power controller, which has to be enabled for the motor to provide any drive.

You may need to remove the battery just to make sure the battery itself is switched on. That depends on the bike.

 

[Chazmo]

By the way, is there a printed manual that you can consult? I.e., does bristol bicycles have a web site?

All ebikes are somewhat different, and there should be detailed instructions somewhere about how to operate yours.

 

[markqaz]

ive disconnected controller now and batt reads zero, if i connect it the reading is 45v. but strangely if i then disconnect controller again and reconnect it the batt reads 4 [four] volts

with controller disconnected i don't get any life by pressing the switch

panda is not trading so i don't think theres a manual available

its a 36v batt

i'll try to attach sum pix in case they can help

thanx

 

[Base]

If the battery is indeed on 4 V than it is in deep discharged state.

 

[markqaz]

If the battery is indeed on 4 V than it is in deep discharged state.

well if i then charge it for a min or 2 it goes back to 45 v

 

[markqaz]

when finished charging the green light is on, do u mean maybe i should leave for longer?

is this mater of inaccurate meter just academic or do we need a correct reading.? i measured a 1.5v batt with it which read correctly

haven't replaced the meters batt yet but did measure the output of the charger with nothing connected and its 46.5v. will get new batt in morning

thanks

 

[markqaz]

i just found an old analogue meter, bike batt reads 42v.....thanks, ive learned something about meters and charge leaking onto the pins

 

[markqaz]

If you are getting adequate voltage to the controller, the display should power up. It only needs battery/ground to turn on,. Doesn't need any other signals from controller to stay lit up,. although it will throw error codes if those other signals don't appear. Suggest tracing the display cable to where it connects to the handlebar harness, Seat/unseat the connector, If there is no harness, and it goes direct to the controller, seat/unset that connector,

At this point, if nothing happens, then you check the power/ground pins in the display connector for battery voltage.

hi, i have looked at display and theres no connection in the wires to check. is it worth opening up the display?
thanks

 

[markqaz]

The power can be held in the capacitors of the controller. Even if the battery briefly turns on.

I would try to disconnect the controller, from the battery, and power the battery on. Since the battery “flashes quickly”, it could be that there is a wiring (or device) fault that is shutting the battery off. Separating the battery from the controller should help quickly isolate if the issue is the battery or a wiring/device fault. Then the next question would be, what voltage are you reading on the battery alone?

hi, ive separated the controller from batt and batt still flashes quickly after the four lights have lit. can u suggest a next step?

thanks

 

[Slaphappygamer]

The only battery with a key, that I’ve dealt with, the key needed to be in a certain position before the display could be turned on. Otherwise, the battery won’t distribute voltage. On that battery, there are little icons on the ring around the keyhole. Maybe yours has a similar ring around the keyhole. Have you tried different key positions and try to turn the bike on at each position?

 

[markqaz]

hi, ive separated the controller from batt and batt still flashes quickly after the four lights have lit. can u suggest a next step?

thanks

my key lock is spring loaded and designed to return to original position after the batter has been removed. i assume its just a catch

 

[Chazmo]

hi, ive separated the controller from batt and batt still flashes quickly after the four lights have lit. can u suggest a next step?

thanks

Is there a fuse compartment on the battery? Have you removed it and checked the fuses?

Do you know who re-built the battery? Can you get some help from that person/company?

Also, when connected, are you getting anything on the controller when you hold the power button down for 5 seconds?

FYI, my battery shows battery charge state on the battery when you turn it (the battery, that is, not the controller) on, and then the leds shut off. There is a glowing ring around the power switch which glows when the battery (not the controller) is on. It’s telling you that the BMS is functioning, not that power is being delivered or anything.

 

[PCeBiker]

I found what appears to be the User Manual for Bristol Bikes,..

Bristol Bicycles User Manual : Free Download, Borrow, and Streaming : Internet Archive

archive.org

EDIT: That doesn't appear to be an e-bike ?

All I'm getting for Bristol Bikes are bike shops in Bristol.

 

[PCeBiker]

It sounds like you have a Bristol Bike with an e-bike kit added to it?

It looks like a Panda E-bike Kit is still available?

Panda Ebike Conversion Kit 250W/36V 10.4Ah battery - Ebike Centres | Electric Bike Shop | Leicester, East Midlands UK

Road legal eBike conversion kit, contains everything you need to convert your bicycle into an electric bike. Get serious with the advanced Panda PRO control system featuring military spec waterproof cabling and advanced LCD screen with live trip information. All components covered by our 1 year...

ebike-centres.co.uk

You may be able to replace some parts depending on what's wrong with your Ebike?

You should also be able to replace the controller and display with a KT controller/display and reuse everything else from your kit without too much trouble, if your controller and/or display are the problem.


EDIT: I just clicked on every Panda conversion kit, and they are all out of stock.

 

[markqaz]

thanks everyone whos been posting especially for the manual link. here are sum pix to illustrate what i have

the bike is bristol bicycles [not bikes] but thanx for looking

the controller is live when i hold on button down for 5 seconds , i think that turns it on

ive checked all fuses [2]

the batt re-builders cant help at all

hope ive answered all the questions

 

[markqaz]

ive just seen the pix posted and yes thats the bike, i'll check the wiring again in morning

thanks for finding that Panda are still trading i didnt think they were
thanx

 

[PCeBiker]

thanks for finding that Panda are still trading i didnt think they were
thanx

They are completely sold out of every type of kit, so maybe there won't be more available if they went out of business ?