One of our customers tried updating the firmware of his Multiplus 12/3000 using (initially) VictronConnect and an MK3-USB. This failed halfway, and since then the inverter will show all LEDs flashing when switched on. He tried redoing the update with VE.Configure to no avail, at this point the MK3 won't even see the inverter any more.
The customer reported this morning that the update via VE.Flash worked very well (via his MK3-USB), and the inverter is once again up & running. So this is definitely the way to go when a firmware update goes wrong.
Multiplus 2 3000 Firmware Download
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I have two MultiPlus 3000 (one for each leg on the Trailer) which I normally monitor through the VE.Bus Smart Dongle (Bluetooth). They updated firmware over VE Connect on Saturday. Since the update, when I look at the Multiplus through VE Connect over Bluetooth the status is "fault" or "Unknown" and the AC input and AC output does not show any status on one of the two legs. Occasionally it will match the remote screen showing the proper charging state, but changes to fault seconds after loading. I cannot replicate the conditions to make it show the correct status. One leg works good and the other does not. Everything was working great before the updates. The Multiplus 3000 appears to be working fine but I can not monitor it or make any changes to it through the bluetooth. I have disconnected it from my Android Galaxy S10 and reconnected it with no results. I contacted the company I purchased the equipment from and they said Victron was working on a fix for the latest update and should be out soon. Need to find a fix for this please??
Another challenge I'm dealing with at the moment is the BMS not seeming to slow down the charging rate of the Victron Multiplus 3000 the battery gets toward full. This seems to result in the high voltage sensor going off and tripping the charge relay which in turn sends an error message to me via the Cerbo GX. I got these consistently this morning as the battery reached full.
Here's a look at the Volts vs. Current Logging for the Past 2 Days. (Please keep in mind, I had a failure of my alternator charging my batteries over a 5 day trip resulting in a low voltage cutout of my system. I failed to realized the alternator wasn't charging over these days, as its worked flawlessly for a long time and I got lazy about continuing to check. I ended up limping to a marina and charging up to 50% before continuing on home. During the 5 hours home there was a brief period where the XT250 alternator worked after fiddling with the wiring, however it stopped workin about 30 minutes later as shown by the major current spike. The other charging activity came from the Victron Multiplus)
Only a short answer, no more time at the moment. Having high voltage alarms after 18 months, I see that more times. Before the cells where nice in balance and there will be no alarm. Maybe cells are out off balance, and it gets important to have all settings correct. Check manual or your GX settings under dvcc are made correctly. post dvcc settings here. dvcc settings are controlling the multi.
If all chargers are under control from Cerbo, the charge relay will never/not open. ( In normall conditions the charge relay NEVER opens ONLY if there is any device in malfunction, or installation , design faults)
I notice that the Victron Multi, is in a few causes not accurated with the output voltage level.
(Victron refuse to look at it, they dont take me serious if I send my complains)
If charge voltage and Cutoff voltage are to close, and the Victron put out a little higher voltage, a charge bus can switch off.
A charge bus if all devices are undercontrol form BMS-CAN, or by the GX, the charge bus should NEVER switch off. Only when a device fails, OR like in one off my experiences, that the Victron Multi is not acuurate enough!!
Voltage Spike: I don't have an explanation for the voltage spike you mentioned. The only charging devices on the boat are the Multiplus and the alternator, and two DC-DC chargers which maintain the starter & windlass/thruster batteries... though I don't think those could be the source of the voltage you mentioned. Based on the timing, I wasn't on the boat so I'm not sure of the circumstances. Though looking at the State of Charge graph, it looks like this is right around the time when the battery hit 100%.
Thanks for diving deep into this. Those events are around a short evening sail I took with friends. Looks like they coindcided with starting engine, sailing, starting again, etc.
Hopefully this is less of an issue with the new Cerbo/Multiplus settings.
Thanks again Ben. It does look like my Multiplus is out of date on firmware. I'm presently running edition 490, and it looks like that is a couple of years old. However, I have to wait until I get back onto the boat to be able to update this. I will do that and get back with you.
This is appears to be the same as it is currently set, though just for fun I sent instructions "SOCH 0.050" to the system, and then queried to confirm and got back "5.00000e-2". So I think all is correct here. 152ee80cbc
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