New Yewy 36v charger

[AKavanaughSC]

From what I've been reading on here, these Yewy chargers are pretty awesome. Is that really the case?

[rlroberts]

Operating manual UY1200z With FLOAT mode.Scan Feb 2, 2019.pdf

Sent from my SM-G965U using Tapatalk

[rlroberts]

Originally Posted by JohnnieB

I agree. The batteries are most likely defective, but the charger ought to have a safety timer. It obviously tracks elapsed time of the charge cycle, so making it stop charging after a number of hours have elapsed without reaching some voltage or amperage criteria would be logical.

I noticed the LEDs next to the data display weren't illuminated. Was the charger disconnected from the batteries when the picture was taken, or aren't the LEDs working?

About the only info I have on the Yewy chargers is what I've found on the Carts Unlimited website, which leaves a lot to be desired. Does anybody have a Yewy manual they can scan into a PDF format and post???????

Could be just bad batteries, but I suspect the Yewy is sick also.

JohnnieB, I posted a pdf of the manual. Also the led was flashing green but the picture didn't get it.

Sent from my SM-G965U using Tapatalk

[yurtle]

Wow, it's "low carbon", and "After connect charger to AC power, charger cannot work... Charger damaged... There is high voltage inside the charger. Please don't open the charger personally" or to cause great dishonor to family.

[JohnnieB]

Originally Posted by rlroberts

Operating manual UY1200z With FLOAT mode.Attachment 181641

Sent from my SM-G965U using Tapatalk

Thanks.

Not much info in it, but enough to make a WAG (Wild A$$ Guess) as to why it isn't completing the charge cycle.

I found the attached drawing online for a UY2000. Not the same model, but looks to be same except for output amps. Apparently the charger puts out the CC (Constant Current) amps until the battery pack's on-charge voltage reaches the CV (Constant Voltage) value, then the Voltage stays the same as the amps are allowed to decrease.

The "manual" you posted indicates the CV value is 46.0V and in the picture posted earlier, the on-charge voltage is 45.5V, so the output amps are staying at about 20A.

It might be the batteries are just too sick for the on-charge voltage to climb to 46.0V, but the charger might be sick. I'd e-mail Scotty and get him involved.

I'm curious whether the UY1200Z has a safety timer or not. If it does have one, how long before it shuts down a failed charge cycle.