Sabvoton 72200 paired with UKC1 display - error 30h

[adamsowy]

Hi guys, I recently purchased e-bike in working condition. I have noticed bits of corrosion here and there so decided to disconnect everything and get rid of the corrosion. After a while when everything was connected I turned the ignition on to find out the error 30H on my display. I have disconnected everything again and connected only the display and 30H still there. I did some research and order a new UKC1 display with a new wiring and after connecting still 30h.

I measured voltage between red and black on the throttle line and between red and black on the hall line. I have only 3.1V on both lines.

When I used google AI I discovered that there should be red and green light but I only have green. Google AI says it’s the faulty internal 5V regulator.

Is this correct? Can this be fixed? Thank you.

 

[Alex12345]

Has the original display ever worked?
The controller has (O) after the model, maybe that's a different protocol than what your display is.

For example, I have a UKC-1 with APT protocol that came with one of my SVMCs, and the controller has (APT) after the model name. UKC1 can come in variety of protocols , I think at least 3.

Have you tried communicating with the controller via a cable or Bluetooth and does that work? When you connect the display do you have the 3 pin plug on the display harness connected?

 

[E-HP]

I’d check the red and black of the hall connector to see if you see low voltage there as well.

 

[adamsowy]

Has the original display ever worked?
The controller has (O) after the model, maybe that's a different protocol than what your display is.

For example, I have a UKC-1 with APT protocol that came with one of my SVMCs, and the controller has (APT) after the model name. UKC1 can come in variety of protocols , I think at least 3.

Have you tried communicating with the controller via a cable or Bluetooth and does that work? When you connect the display do you have the 3 pin plug on the display harness connected?

yes, the original display did work. If two displays use two different protocols would both of them display the same error (even to one worked)
I did not try communicating with the controller via a cable or Bluetooth.
Before I try anything, firstly I would like to know what should be the correct voltage between red and black on the throttle line and between red and black on the hall line.

I’d check the red and black of the hall connector to see if you see low voltage there as well.

Do you know what should be the correct voltage between red and black on the hall line?

 

[E-HP]

yes, the original display did work. If two displays use two different protocols would both of them display the same error (even to one worked)
I did not try communicating with the controller via a cable or Bluetooth.
Before I try anything, firstly I would like to know what should be the correct voltage between red and black on the throttle line and between red and black on the hall line.

Do you know what should be the correct voltage between red and black on the hall line?

5v
Since that model supports PAS, you should also see 5v on that connector too.