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diy solar

diy solar

JK BMS Stuck in bootloader ?

jaxone

New Member
Joined
Mar 19, 2022
Messages
29
Location
Denmark
I'm in the process of transitioning from Pylontech passive BMS over to the JK PB active BMS.
Had the JK on a bench setup for a week or so to check how it works, integration with HA and other things ...
Yesterday I started it up , connected to 15 Pylontech pouches (as always) and tried to talk to it via RS485 ... no response... Shut it down (took battery power) , powered up again and NO SOUND came on from the BMS.. screen was black. No bluetooth either.
Shut it down again (battery power disconnect) as shutdown button did not work , powered on and it emitted 2 short BUZZ sounds .. pause ..one longer buzz and that was it.
Video here :

Anyone seen this before ?
As the BMS is 2 weeks old I did not open it yet but I will do tonight to check for any "smoked" parts.
 

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