Issue with BBSHD - full battery recognized as empty

[jpdio]

I have had my BBSHD@52V for 6 month now and it ran flawless for 500km - now it suddenly stopped working.

My fully charged battery is shown as empty in the display even though the voltage read out somehow is close to reality.
Nothing is working - No power in PAS or throttle - motor is doing nothing
Does somebody have a hint what the issue might be? Maybe display or controller issue?

 

[alfantastic]

It's always a good idea to switch the battery off, disconnect every Bafang Higo connector, then reconnect. Switch the battery back on and give it a go.

Not saying this is your problem, but it can eliminate some problems. Has it ever thrown up an error code?

 

[jpdio]

Tried all that - no error codes.

Still no sign of life from the motor.

 

[Rassy]

The most common problem I see posted is a faulty brake switch, or slightly activated brake lever. Have you tried it with the brake wires disconnected? If that were the problem I don't know why it would cause the battery display to be blank.

 

[d8veh]

There's a capacitor in the display, which might keep the display powered when disconnected. This is only a long-shot, but worth a try. Disconnect the battery. Press the display's power button, which should make it flash on for a very short time until the capacitor is empty. Wait a few seconds and reconnect.

What battery voltage is set in the display? Did you use UBE? if so, try 48v.

 

[jpdio]

It ran for a few seconds and then the display froze - see picture. After restarting I had the same empty battrry shown and no sign of life of the motor.
After that I tried turning on with no battery connected to empty the capacitors. No luck
Also changing voltage had no effect.

Btw. No brake switch connected.

Thanks for your help.

 

[jpdio]

Do you guys think it is an issue with the controller or with the display?

//JP

 

[kerrylaw]

I run a BBSHD, but with a DPC-10 display. ( not sure that matters for this diagnostic ) BUT, I know for sure, if I unplug my display, my throttle still works. I guess if yours behaves the same, ( no reason the BBSHD shouldn't ) Then the controller is fine.

I have just received my programming cable and have been playing with programming also. Do you have a cable? If so, reset all setting to the BBSHD default. If you do not have a cable, and haven't been messing with programming, then try the throttle with display disconnected. Let us know.

 

[jpdio]

I was finally able to figure out what it was.

After swapping out the display - with no luck.

I opened the controller and was greated by some water dripping out of the case. The reason was the seal that was bend - bad manufacturing.

Let's see if I get a warranty swap.

 

[Jirkoj]

Hello, I would like to ask if the change of control helped?

Thank you in advance.

 

[jpdio]

Yes, it fixed the issue.
Btw the Bbshd is still tunning - several free wheels, bearings an d 1 nylon gear and pinion later…