No Power

[brnorman]

I have Addmotor M-150 that has only 30 miles on it and it stopped running. The display works, the battery has tested fine, and I sent the controller back and it was tested and reprogrammed. When I turn the bike on and use the throttle the motor will engage to the point that you can't push it backwards but it won't move the bike forwards. Appreciate any suggestions.

Thanks

 

[E-HP]

The display works, the battery has tested fine,
Thanks

What test was performed on the battery? When the problem occurs, does the display stay on or shut off?

 

[brnorman]

Voltmeter test on battery shows 54.3

The display did turn off and would not come back on until I turned off the battery and turned it back on.

 

[brnorman]

Unfortunately I am hosed on the warranty issue. I purchased the ebike off of Craig's list when it only had 2 miles on it. I put another 28 miles and then it developed the problem. I am working with Addmotor support via email but they will only honor warrantee for the original owner. I am thinking I might be able to test a battery from someone else in the neighborhood but not sure if any will be compatible.

Not sure what their next recommendation will be as I only get one email back and forth each day and they just had me reseat the battery since the lock hole was a off a tiny bit and I unscrewed and moved the bracket down so that it fit better but had no effect on the other issues. So bummed out because I loved the bike while it worked for the short time that it did.

 

[calab]

M-150 looks to be a fat, folder 24" rear hub, with controller down by bottom bracket.

Lift the bike, and hit the throttle see how long it goes, slap a multimeter on the battery and keep an eye on it.

If it is the battery, you can hit the junk yard, pick up 4 or 5 batteries and do unloaded test runs with the hub motor up in the air.
Putting 4 twelve volt batteries in series make its 48v.

Then, I would scrap the stock controller, buy a generic ebike sensorless controller.

Deal with the battery if its an issue, keep the stock controller as a spare.

 

[amberwolf]

First, did the problem you now have start only after the controller was "sent back and reprogrammed" (sent to where? reprogrammed from what to what?)?

Or did this problem exist just as it is before that happened, and was it the reason for sending it?


If it existed before:

If the problem is the same regardless of whether the battery has been recently charged or not, it could be a probelm in the battery (which would require opening it up to begin diagnosing by testing voltages between the pairs of wires at the largest multi-wire connector on the BMS board), or it could be a simple connection problem in the system cabling.

Wires and connectors are *the* most common problem in any electrical system, and most of the problems on ebikes are loose connectors, broken or damaged wires, etc.

So the first thing I'd check is unplugging, examining in direct sunlight, and replugging every connector, especially the throttle and motor connectors.

Sometimes water intrusion in the controller itself, or the motor or display, connectors, etc., may cause the problem instead. Often this is evident during the connector inspection in direct sunlight, but sometimes it is not visible (inside the components).

The battery itself may be a separate problem; complete loss of power on the system is usually caused by the battery's BMS shutting off to protect against overdischarge of low-capability/capacity cells.

 

[brnorman]

The controller was sent back to Addmotor facility in California where they put it on their bike and it worked fine. Then they said that they reprogrammed it back to factory settings. The symptoms that I am having with my bike were the same before and after I sent them the controller.


Thanks to everyone who responded. I also talked with an ebike "expert" this evening that things that the motor is bad. I am getting another ebike so that I can continue to try and work out what the issue is with this one. So frustrating. The vendor has basically told me to take it to a bike shop for repair (which they won't pay for since I am 2nd owner) but even in major city like Denver I am having trouble finding an ebike repair shop that will service a bike that i didn't purchase from them.