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andrew.b avatar image

BYD B.Box 13.8 alarm translation?

Seems b.box 13.8 connected to quattros and CCGX doesn't work. But I can't translate it's alarm.

4 times blinking BMU means battery failure. error and alarm leds blinking?

ESSBYD
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4 Answers
Guy Stewart (Victron Community Manager) avatar image

A red light must be reported to the place of purchase of the BYD. It is an internal fault, and should be fixed under their warranty.

To find out exactly what is wrong, an RS485 to USB converter (like Victron sells here) connection is required. When the battery in fault is connected directly with a computer, the BYD Battery & Query History Tool provides the diagnosis.

This is a technicians job, and that is a service tool. So if you are a customer, you are strongly advised to return the battery to where you bought it and let a technician service/replace it.



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Boekel avatar image

@BYD_service might be able to help.

But if it's not setup in a system that's properly engineered, I doubt BYD are willing to support you.


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BYD_service avatar image

Hello Andrew,

Can you email me the details of this system? agarcia@eft-systems.de


By the way, why is there no cable between the BMU and the inverter?


Thank you

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It's the second video. We turned it off to see the difference. But error is the same. What details do you need? I really can't say more then on video.

BYD_service avatar image

Hello Andrew,

We need to analyze the root cause.

could you send the system configuration, serial number of the bms and batteries, what had the system been doing before and ideally link to VRM.


Thank you

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