I can't Charge my Battery
Battery appears to be dead and you cannot charge it?
Awaking the Battery after Auto-Sleep mode:
Plug the charger into a power bar with a switch (or an outlet with the switch next to it, it's way easier than unplugging/plugging back) . Do not turn on the power bar yet, insert the charger plug into the battery charge port.
Turn on the main power, the moment, the red and green indicators of the charger will alternately blink, turn off the charger and then on again.
The red indicator of the charger will blink fast (0.5 second per time). The blink time will last to 20 seconds.
After the 20 second blink, the red indicator will be a constant light for 10 seconds. During this 10 seconds, turn off at the power point and then on for one time.
After Step 4, the “Forced Charging” function of the charger will be turned on. Then, the charger will work normally
You may need to do this procedure up to 15 times.
This video shows you exactly how to do it:
In Step 3, during the red indicator’s 20 seconds fast blink, please do not turn off the charger. Otherwise, you need to start the procedure again from step 1.
In Step 4, the action to turn off and then turn on the charger needs to be finished during the 10 seconds, when the red indicator is constant light. Otherwise, you need to start the procedure again from Step 1.
UNPLUG FROM BOTH BATTERY AND OUTLET FOR 10 SECOND BETWEEN EACH ATTEMPT
If you still can't charge after 20 attempts:
Measure the voltage with a multimeter: flip the ignition OFF ,then the breaker OFF, unplug the battery fully, wait 30sec, and measure from the charge port, you should be reading anything between 45V up to 67.2V depending on the state of charge.
Next would be to plug the battery back, measure the voltage from the charge port (see attached) and while measuring flip the breaker ON (note the voltage) then turn the ignition "ON" and measure the voltage again. As you can see in my case the voltage went up a little .. that is because the BMS was sleeping and we just woke him up (really). If you turn off the breaker and wait 30 sec or so the voltage should go back down a little (in this case it dropped 0.4V)
IF you had a weird battery reading, like voltage dropping under 45V when you switched the ignition, Unplug both front and rear lights, if one of them is shorted out the main display and the motor wont run. You can access the headlight connector under the ignition and access the rear light connectors from the back of the rear light.
Battery load testing:
Best is to use a 120VAC incandescent bulb or a halogen bulb as they work great with any voltage, at 60VDC they will be roughly 30-40% of the regular brightness. If you have a large resistors be aware that you will need to apply a small load like a light bulb before apply a large load of the BMs will trip instantly.
Unplug the battery from the bike, let it rest for at least 30 secs, measure the voltage from the battery pack. Then connect the light bulb to the discharge port (there is no polarity on a incandescent light bulb). If you see the voltage drop (like these 2 pictures below) then it's likely the battery BMS that has an issue. In this situation please contact firstname.lastname@example.org
If not please continue testing