Carrera Crossfire

[Deleted member 4366]

I get around a bit and often get involved in interesting conversations out of the blue. Today I heard some interesting things about the Suntour HESC problems. Suntour are suggesting that some of the cut-outs are due to the connection between the LCD and it's receiver. Some are very loose so they rattle when the bikes is going. Others are relatively tight and don't rattle. Obviously it's the loose ones that give problems. The pins are tiny and could easily wear. If yours is loose, stick something in it to wedge it a bit tighter.

I repaired one that had bad corrosion between the pins so check for that too and put a big dob of silicone grease on to protect them. This rattling would clearly lead to some problems, but I'm not convinced it's the whole story. I still think that there's either software or sensor issues in the battery.

As I expected, the torque sensor things are very prone to contamination, which renders the bike inoperable, so many have to be repaired. That will be really bad now with all the salt on the roads. You have to remove the crank to service/clean them.

There seem to be different pedal sensor versions on the various Carrera bikes. It was difficult to be sure because all the bikes were all jammed together tight, but it looked like it wasn't only the Vengeance that had a conventional pedal sensor, so if you buy one of these bikes, I'd go for one with a conventional pedal sensor rather than the optical thing, whatever it is. Look for the magnet disc and sensor sitting behind the chain-wheel.

 

[Deleted member 4366]

I forgot to mention that he Suntour HESC, like the Bosch, has a way to setup the 4mph walk assist as a full-speed push-for-on throttle.

 

[egroover]

I forgot to mention that he Suntour HESC, like the Bosch, has a way to setup the 4mph walk assist as a full-speed push-for-on throttle.

Interesting d8veh...Any idea how ?

 

[egroover]

I get around a bit and often get involved in interesting conversations out of the blue. Today I heard some interesting things about the Suntour HESC problems. Suntour are suggesting that some of the cut-outs are due to the connection between the LCD and it's receiver. Some are very loose so they rattle when the bikes is going. Others are relatively tight and don't rattle. Obviously it's the loose ones that give problems. The pins are tiny and could easily wear. If yours is loose, stick something in it to wedge it a bit tighter.

I repaired one that had bad corrosion between the pins so check for that too and put a big dob of silicone grease on to protect them. This rattling would clearly lead to some problems, but I'm not convinced it's the whole story. I still think that there's either software or sensor issues in the battery.

As I expected, the torque sensor things are very prone to contamination, which renders the bike inoperable, so many have to be repaired. That will be really bad now with all the salt on the roads. You have to remove the crank to service/clean them.

There seem to be different pedal sensor versions on the various Carrera bikes. It was difficult to be sure because all the bikes were all jammed together tight, but it looked like it wasn't only the Vengeance that had a conventional pedal sensor, so if you buy one of these bikes, I'd go for one with a conventional pedal sensor rather than the optical thing, whatever it is. Look for the magnet disc and sensor sitting behind the chain-wheel.

Thanks for the tip on the silicone grease, have ordered up a tube to put on the pins. Didn't have to worry about it on the previous model crossfire-e as the display was non removable. Any tips on anywhere else the grease can be applied or needed ?

 

[Plodder Bob]

Cmon d8veh spill the beans ! Especially if it doesn’t require badass / speedbox for Bosch cx motor ...

 

[footpump]

a throttle (fix) for bosch would be most welcome

 

[Deleted member 4366]

a throttle (fix) for bosch would be most welcome

I don't think the Bosch can be done yourself. You need programming software. I've seen one done, so I know it's possible.

The crossfire might be possible by pressing the right combination of buttons to get to the settings. I've never had a chance to play with one, but I have it on good authority that it's possible.

On both of them, I would guess that you change the wheel size setting so that the controller misreads the 4mph unless there's a separate setting for walk assist speed, like on many Chinese bikes.

 

[egroover]

I don't think the Bosch can be done yourself. You need programming software. I've seen one done, so I know it's possible.

The crossfire might be possible by pressing the right combination of buttons to get to the settings. I've never had a chance to play with one, but I have it on good authority that it's possible.

On both of them, I would guess that you change the wheel size setting so that the controller misreads the 4mph unless there's a separate setting for walk assist speed, like on many Chinese bikes.

Pressing the buttons to change wheel size (to increase top speed) sounds more than possible, this manual from an earlier Suntour HESC model describes that setup http://srsuntour-files.dbap.de/_public/SRSUNTOUR-DOWNLOAD-AREA/E-BIKE-Service/Twin-Sensor(english-only)/Speed Indication Setting (EB-PSI-2013-14).pdf
If only we could find the equivalent info for the current HESC system on the Crossfire-e

That old doc looks interesting, especially combined with the thread from last year post #56 http://www.pedelecs.co.uk/forum/threads/delimit-carrera-crossfire-e.27555/page-3

 

[footpump]

a local dealer went on the bosch course to be trained so he would be qualified to be a bosch ebike technician.
whoever was demoing the bosch programming firmware software to the .
trainees put in the wrong wheelsize

so this increased the speed to over the 15mph cut.

on my bosch intuvia display the wheel size is set and can only be altered up or down by 5%
the bosch technicians are given a dongle, and can download the updates from bosch . to update the lcds for instance.


as I understand it it is only bosch that have access to the programing tools

 

[Deleted member 4366]

The Bosch programming dongle gives access to the wheel size, so you need one of those to change it - and an account.

 

[footpump]

at the time I spoke to the dealer he had just finished the course a couple of days before, and the dongle had not been tried or used.
he did say you need account to access bosch files etc.

so in theory you could ask a dealer/technition to alter wheel size and be above 15mph?

 

[RupertH]

Thanks for the tip on the silicone grease, have ordered up a tube to put on the pins. Didn't have to worry about it on the previous model crossfire-e as the display was non removable. Any tips on anywhere else the grease can be applied or needed ?

Any grease is an electrical insulator. Keep the contacts clean and dry and use the grease to stop water getting in