LCD3 display reading

[UrbanPuma]

Hi all,

I took my bike to a shop, but they couldn't get the bike to work with the KT controller/display, but I noticed a reading which is stored...does it mean they got the wheel to spin to 9mph? Also, what is the 03. referring to?

Pic attached.

The bike works with different controllers and has my old pedal sensor magnet attached to the crank area, but I would like to know why the KT doesn't work.

Could the reason be because the bike/wheel needs a compatible KT PAS sensor?

Thanks

 

[Nealh]

That reading is 3.9mph .

I suspect they either don't know what they are doing or do not know how to set the KT parameters.
As to the PAS you haven't told us anything about the sensor you are using or provided a pic.

We need to know which hub motor is being used.
A pic of the PAS sensor/disc.
A listing of your P & C settings from the display.

Not all PAS work with KT, though one doesn't always need a KT PAS.
We need to see the wiring sequence as well for the PAS connection .

 

[saneagle]

It's only showing 27.7v. Is it a 24v battery?

You can get the 9 mph just by spinning the wheel with your hand to test that the speed sensor is working.

whenever you get a new controller, you should test it with a throttle because pedal sensors can give many issues, the main one being that there are two types of connector that have different wire sequences, but still fit together, so the wrong wires are connected.

To test your system, disconnect everything from the LCD except the battery, motor and LCD. Switch on the LCD, lift the motor wheel off the ground and hold the down button to engage walk-mode. If the wheel spins, the controller is working. If it doesn't then you have to look at motor connection, battery voltage and things like that.

If it works with walk assist, but not when pedalling, there's something wrong with your pedal sensor or the settings in the LCD.

 

[UrbanPuma]

That reading is 3.9mph .

I suspect they either don't know what they are doing or do not know how to set the KT parameters.
As to the PAS you haven't told us anything about the sensor you are using or provided a pic.

We need to know which hub motor is being used.
A pic of the PAS sensor/disc.
A listing of your P & C settings from the display.

Not all PAS work with KT, though one doesn't always need a KT PAS.
We need to see the wiring sequence as well for the PAS connection .

It's an old bike with a geared hub motor with 16" wheels. I've no idea what the sensor is, but have included a photo as best I could get. PAS wiring is black/black, brown/red and yellow/white

Setting are:

P1. 87
P2. 1
P3. 1
P4.0
P5.8

C1.02
C2.0
C3.0
C4.0
C5.10
C6.3
C7.0
C8.0
C9.0
C10.n
C11.0
C12.4
C13.0
C14.2

Throttle wires are: blue/green, black/black and red/red.

 

[UrbanPuma]

It's only showing 27.7v. Is it a 24v battery?

You can get the 9 mph just by spinning the wheel with your hand to test that the speed sensor is working.

whenever you get a new controller, you should test it with a throttle because pedal sensors can give many issues, the main one being that there are two types of connector that have different wire sequences, but still fit together, so the wrong wires are connected.

To test your system, disconnect everything from the LCD except the battery, motor and LCD. Switch on the LCD, lift the motor wheel off the ground and hold the down button to engage walk-mode. If the wheel spins, the controller is working. If it doesn't then you have to look at motor connection, battery voltage and things like that.

If it works with walk assist, but not when pedalling, there's something wrong with your pedal sensor or the settings in the LCD.

Yes, it's a 24v battery. I've been testing it with the throttle and get a slight judder from the wheel but no spin. I keep getting 03 error.

 

[Nealh]

Error 03 is a motor hall fault , but can also be a bad Hall connection .
Double check the motor connector is 100% pushed in up to the marked line on the motor side of the connector, also check the controller Hall connections. Bar that one has to carry out a Hall wire test.
HallSensorTesting.cdr (ebikes.ca)

Disconnect the motor cable and make sure a pin isn't bent.

 

[Nealh]

P & C settings are and look pretty ok to me.

 

[UrbanPuma]

Error 03 is a motor hall fault , but can also be a bad Hall connection .
Double check the motor connector is 100% pushed in up to the marked line on the motor side of the connector, also check the controller Hall connections. Bar that one has to carry out a Hall wire test.
HallSensorTesting.cdr (ebikes.ca)

Thanks

 

[Nealh]

Tony will be smiling that some one is having issues with a KT and will be soon wanting to tell you to use a Lishui.
D8veh & I have been using KT's for many years with out issues as will have many others, it is user error or not understanding the fairly simple set up of the parameters.

 

[UrbanPuma]

Tony will be smiling that some one is having issues with a KT and will be soon wanting to tell you to use a Lishui.
D8veh & I have been using KT's for many years with out issues as will have many others, it is user error or not understanding the fairly simple set up of the parameters.

Halls have been tested and work. Bike works with 2 different controllers, yet this one has error code. I did get it to display a couple of times in the past without the error but the wheel still didn't spin. Tried different wire combinations and still nothing. I give up!

 

[saneagle]

Yes, it's a 24v battery. I've been testing it with the throttle and get a slight judder from the wheel but no spin. I keep getting 03 error.

You should have said that before. It's not normally anything to do with the pedal sensor unless you have shorted the 5v to ground in your connection. Juddering is a commutation issue that means that something is wrong with power pulses going from the controller to the motor.

First you must make sure that the motor connector is in all the way to the line, not just in tight and that there'sno damage to the motor cable. Next you need to measure the 5v on any of the connectors while everything is connected.

 

[UrbanPuma]

You should have said that before. It's not normally anything to do with the pedal sensor unless you have shorted the 5v to ground in your connection. Juddering is a commutation issue that means that something is wrong with power pulses going from the controller to the motor.

First you must make sure that the motor connector is in all the way to the line, not just in tight and that there'sno damage to the motor cable. Next you need to measure the 5v on any of the connectors while everything is connected.

Ok

 

[jimriley]

Could the juddering be the 3 power wires connected wrongly? I had to go through a series of combinations to find the right one when adding a KT controller with lcd3 to a hub motor. While there were 3 colours the same, from controller and to motor, nothing worked matching the colours. The controller came with a connection block to facilitate testing and ultimate connection.

 

[Nealh]

Your first task is to confirm if the motor hall tests are good or bad, if all are good then there are
with Halls 36 possible wire combo's to work thru, maybe 3 or 4 will work .
One then has to pick the one that one feels is best.

I have posted many a time a chart to go thru checking all possible combo's.

I have connected mxus, akm , bafang's and the first yose hubs without any issues and colour to colour have simply worked. Occassionally the odd hub brand doesn't work straight off the cuff.
It is looking like you have one of those hubs that needs to have all the combo's worked thru.

 

[harrys]

Halls have been tested and work. Bike works with 2 different controllers, yet this one has error code. I did get it to display a couple of times in the past without the error but the wheel still didn't spin. Tried different wire combinations and still nothing. I give up!

Unless those two other controllers were sensorless controllers, this shows that that the Hall sensors in the motor work.

Could be a broken wire in the controller cable, or blown circuit in the controller.

I've had the Err 03 when I spliced a 9 pin plug onto a motor cable, and had one of the Hall wires break.

 

[Nealh]

The halls with the two other controllers may have been ok but since the switch to the KT something may have ocurred for one to fail ( very remote chance ) so a hall test is still prudent.

 

[jimriley]

This might help with phase wire matching.