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Error 30 is communications fault between controller and LCD, one or the other has a fault, sounds like possibly the display is damaged.

Those mileage ranges are on the same 700c commute /town bike, assist cut off is 26km/h or 16.15 mph on flat terrain, above that I'm on my own power. Demanding less current increases range less sag stress on cells and higher SOC across the board. Unlike your Luishi's where you set the current %...

The pots on the charger again are fuzzy when I zoom in, I think the lower one says V01 which is the voltage pot the other I don't know as can't read it but suspect it is a current pot (so leave it alone).

I think that may be just heat shrink insulation Ben, the pics get fuzzy when one zooms in so not very clear to see.

Check the 10a fuse it is the charge fuse , 30a is the discharge fuse.

No as Ben has said you have to disconnect the motor completely from the controller, so either disconnect the phase connection or the motor connector.

Sorry have to disagree Tony, with my 20a KT the first three PAS give approx. PAS1 13%, PAS2 20%, PAS3 33% of available current, I get with my ageing 29e batteries 35- 40miles, 18- 24 miles & about 12 miles respectively.

Or opt for the popular LCD3 & controller. https://www.aliexpress.com/item/4000333873669.html?spm=2114.12010612.8148356.12.a25160afcsFHMF KT are very universal and many vendors sell them so should you break anything they are easy to get hold of and always compatible for spares. The five KT power...

It looks alright but some of them are a bit crappy, no specs on current rating so might only be 10 or 12a. Has all the connectors for all peripherals, you may have to play with the hall connections as the connectors aren't the same though you can use any 5 or 6pin our male/female connector you...

Hubs with motor hall have 3 + 5 or 3 + 6 smaller wires, 8 or 9 in total indicate it is a sensored hub the sixth hall which makes nine is for internal hub speed sensing,

First try disconnecting the motor wheel or controller then see if the hub free's up, if so then either the phase wires are shorting or a controller mosfet has failed.

Nanjin are OEM supplied only afaik. The connectors are different on controllers, usually you have to do some soldering to changes things over. You might have yo change controllers KT or Lishui. The pair SM2 Black/White are brake cut outs. I see two SM5 wire connectors, one is led or lcd and...

Quite a bit of copying and pasting has been going on lately Gaz, this poster isn't the only one. I don't get it.

250w front is a bit weedy I think about 20/25nm, in steel forks you wouldn't need to worry about fitting torque arms. If you are lightweight then not an issue. The downtube battery with Samsung 29e cells is one of the best cells in the 2900mah class and is highly regarded, though not sure I...

Tbh a much better offering then the faster wound 290 rpm hub, the old faster hub makes the 6 fet KT controller work very hard esp on hills an din top assist. The controllers just can't take it.

Batteries aren't so daunting to investigate if you have a good clear workspace and taking pics for reference can help as you go along. Only use metal implements for one reason undoing case screws otherwise if poking/ prodding around once open use plastic or wooden implements, remove any hand or...

What kind of riding/use ? These kits are D/D hubs and ideal for flat faster riding. They lack the versatility of a geared hub, buyers are influenced by the cheaper price. To get the best out of these kits you need to spend about 3 times the cost of the kit to get a good powerful battery that...

I nearly splatted one in Horsham yesterday evening with a middle aged user, he wasn't expecting a 3.5t van to come round the corner of a quiet residential street when all was quiet. He shat himself looking at his face and then decided too late to turn the front light on. Tbh they will become a...

The controller rating is 24v.

I have had two chargers which I have had to re-calibrate via the voltage trim pot because the output measured 42.6v, I check the charger output regularly on all my chargers. Also I only charge to 4.1v per cell as well now. The battery has been dormant and may have a weak cell group, following...