JBD BMS will not charge or discharge

[@DrAuwal]

Hello, my JBD BMS will not allow charge or discharge and this happened after my 24V LIFEPO4 battery drained to zero percent (0%) (from Xiaoxing app). When the BMS is connected to the SCC, the voltage will rise quickly and register full charge delivering 0 amps. I charge it directly via the SCC to about 36% and still the BMS did not start. When I connected the load via inverter the voltage of 26.1V quickly drained to 17.3v and the inverter disconnected.
The specs of the BMS is (AP 20S006 20S 200A).
I tested charging the battery pack directly with SCC and also discharging with an inverter and it works.
It means it is the BMS that is the issue.
Kindly help with the solution.
Attached is the picture of the BMS model too.
Thanks

 

[Supervstech]

Do you have a power supply you can set to 3.6V and individually charge the cells?

 

[@DrAuwal]

Do you have a power supply you can set to 3.6V and individually charge the cells?

Yes, I have that 3.6v charger.

 

[Supervstech]

Set it up, and start charging each one to get them above 2.5V

 

[@DrAuwal]

Set it up, and start charging each one to get them above 2.5V

Ok. I will try that.
Thanks

 

[@DrAuwal]

Hello, I charged it to 3.34v each but the BMS did not allow current in or out.

 

[42OhmsPA]

Can you share screenshots of the app?
Have you isolated it and attempted to charge with a dedicated charger (not mppt)?

This might help.

Solved JBD Experts Help. No current. I'm stumped.

Edit - solved. Shut off the other 2 breakers and isolated the problem child, started charging right away. Back to batteries and doing some laundry to drain them down for optimal photon harvesting tomorrow. I finished wiring up the 3rd pack and I can't get current to flow through the BMS...

diysolarforum.com

 

[@DrAuwal]

Can you share screenshots of the app?
Have you isolated it and attempted to charge with a dedicated charger (not mppt)?

This might help.

Solved JBD Experts Help. No current. I'm stumped.

Edit - solved. Shut off the other 2 breakers and isolated the problem child, started charging right away. Back to batteries and doing some laundry to drain them down for optimal photon harvesting tomorrow. I finished wiring up the 3rd pack and I can't get current to flow through the BMS...

diysolarforum.com

I actually did not try that as I do not have a 24V Lithium charger right now.
I only charge it with an MPPT SCC.
I will try getting a charger and see.

Attached are pictures of the app "RT" and my BMS settings.

 

[42OhmsPA]

I actually did not try that as I do not have a 24V Lithium charger right now.
I only charge it with an MPPT SCC.
I will try getting a charger and see.

Attached are pictures of the app "RT" and my BMS settings.

I'm thinking that will solve the problem. Charge and discharge appear to be turned on and it doesn't appear to be in any protection state.
You could try adjusting the circled parameter

 

[@DrAuwal]

I'm thinking that will solve the problem. Charge and discharge appear to be turned on and it doesn't appear to be in any protection state.
You could try adjusting the circled parameter

Ok. I will try that.
Thanks