VE Bus error #15

DIY
, , , ,
1

Ive installed a Multiplus ii 12 3000 230v with a Cerbo GX and Lynx smart BMS plus udated to latest firmware (Cerbo v3.42, Lynx Smart BMS v 1.11 and Multiplus ii v552) connected with Victron RJ45 cables, but I can see the BMS is not connecting to the Multiplus.I get the flashing bulk in contra phase to the ‘Inverter on’ flashing plus a constant absorption light on the Multiplus and a #15 error from the Cerbo. Anyone any thoughts?

2

How did you connect the RJ45 cables?
MultiPlus is VE.Bus and Lynx BMS is VE.Can, don’t mix that up.

3

I connected multiplus to ve.bus ports on cerbo and ve.can from cerbo to Lynx bms

4

What about terminators?
Only the VE.Can should be terminated NOT the VE.Bus.

Try different cables.
What other components are in the system?

5

I put 1 terminator on ve.can section of cerbo and the other on Lynx BMS (tried swapping around position of terminator). Swapped rj45 cables just in case. At this stage only other components in system are distributors either side of BMS and linked in parallel to 4 Victron smart ithium batteries. Also put an on/off switch on bms.

6

Battery cells are also unbalanced if that has an impact

7

Hmm… You have to test each device one by one on its own.

  1. Does the MultiPlus work in stand alone without a connection to the Cerbo?
    (You might have to do a factory reset of the MultiPlus)

  2. Does the MultiPlus work with a connection to the Cerbo but without the BMS connected?

  3. Connected the BMS.

8

Thanks - i’ll give that a go n the morning

9

OK, I disconnected Multiplus and looked to do a factory reset. Went into ve.connect and noticed the ‘ve.bus bms detected’ button was on and configure for lithium batteries greyed out. I disabled and it switched to Lithium batteries. I then went into ve.config (shortened version) and noticed that when I hit configure for victron batteries, under charging section, it enabled the ve.bus bms setting and then, Im assuming, couldnt find it (had a look online and this doesnt appear to be a lynx bms). Might be getting it wrong, but now batteries are charging, but imblanced. Thanks for help - it pushed me in the right direction.

10

Hi I’m having the same issue I did test almost everything what you had suggested here but the lights are still flashing how did you ended fixing it ? Thanks

11

Hi Carey,

Really sorry for time taken to reply – I hope you have found a fix.

However, just in case this is of any use, yes, my lights were still flashing and the only way I could get the batteries back to balance was by going through a charge period until lights started flashing, turning off and then repeating cycle. I noticed that the batteries were gradually receiving a higher charge. After some time one of them became balanced and, eventually, all of them and lights stopped flashing. Therefore worth logging into each battery to see if there is any improvement in charge status.

Are you getting at least a period of charge?

Best Regards

John

PS: I’m far from an expert, it really has been learning by doing.

12

Hi John,
The guys at Victron Support found, after three days that the ve bus icon in Assistant folder of the Multi Plus ll was selected. Once this was unselected the system came to life. Must have been in the factory defaults because nobody knew to look there.
Thanks for your reply and thanks to the support team at Victron
Kind regards Carey

13

Hi Carey,

Thanks for info – so it was the Multiplus II cutting in on the Lynx BMS – think it is the case of the legacy systems overriding the new one. Hope all goes well from here on in.

Best Regards

John