Ebike speedometer shows 99kmph and all fault symbols when there is no throttle

[Nazan]

Hi, so I have an ebike display which when I give power shows all functions for 2 secs. It has PARKING MODE, REVERSE INDICATION, 3 SPEED INDICATION, THROTTLE MALFUNCTION INDICATION etc. So I connected to one of my ebike which has analog meter connection and it shows only speed. So then I I connected it to another ebike which has digital meter connection and then my ebike shows no speed or anything. Just Ready and 00. So I opened it and found a missing wire so I connected it to that and it shows 99 if I give Throttle at any value and still no Indications, but other display shows everything. I am also attaching my display photo below.

 

[99t4]

Many controllers and displays are a matched set. They don't work mix and match.

 

[Nazan]

So I have an ebike with display, it's great and shows all the functions, but there is a problem. When I use the throttle it shows speed and it goes 95kmph(on stand)
And when I leave the Throttle it gradually comes down to 0 but before it goes to 0 it shows 99kmph and all the fault symbol for 2 sec and then the actual speed again. This happens only when I don't use the Throttle. I am attaching the display photo
It shows like this even though I don't even have 4th mode

 

[E-HP]

You might want to ask your question on this thread:

QSmotor/SiAecosys/Taizhou CT-22 Programming. 1 of 8

Not sure where to put this, but I'm going to herein attempt to document the steps needed to program a QSmotor SiAecosys Taizhou CT-22 digital speedometer, which can, and is, used for eBikes, eMotorcycles, and eScooters. The SiAecosys CT-22 is an ostensibly "high end" speedometer in that it is...

endless-sphere.com

 

[Nazan]

I did post it there, but there is no reply