Error code: #67 - No BMS, Inverter turns off

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terror-storm asked Apr 20, '23

Error code: #67 - No BMS, Inverter turns off

Hello,

We have an RV with a Lithionics 48V RV-C lithium battery & BMS (fw v9.0.02), Cerbo GX (fw v2.94), Multiplus II 3kW (fw 492), SmartSolar 150/35 (fw v1.61).

Periodically the system experiences an error with these symptoms:

The MPPT appears to lose communication with the battery
- It changes from Ext. Control to Float, and produces code #67
The inverter AC output turns off
- The VE.Bus state changes from Inverting to Off

It seems to only occur during the times 7am - 9pm, never after 9p or before 7a. Perhaps it has to do with the solar cycle? In my mind this is not likely a wiring issue, since it doesn't occur overnight.

The issue has always been rectified automatically in a short period of time (1s to 1m, 41s).

See table below for instances of the error, and snips from VRM showing the other symptoms.

Any insight is welcome and appreciated. Thank you!

Device	Triggered by	Description	Started at	Cleared after
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/19/2023 13:27	19s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/18/2023 18:18	11s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/16/2023 9:50	1m, 3s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/15/2023 14:42	55s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/15/2023 13:52	1m, 5s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/14/2023 16:39	50s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/13/2023 18:07	1m, 6s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/9/2023 7:14	59s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/8/2023 12:15	56s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/6/2023 16:46	1m, 41s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/6/2023 15:32	59s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	4/4/2023 8:08	1s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	3/28/2023 13:23	3s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	3/27/2023 17:13	11s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	3/23/2023 12:20	47s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	3/1/2023 17:07	1m, 6s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/28/2023 16:16	1s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/26/2023 13:09	28s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/25/2023 16:12	23s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/20/2023 9:48	46s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/19/2023 15:41	27s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/18/2023 17:28	53s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/18/2023 16:39	22s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/17/2023 15:36	18s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/17/2023 14:23	17s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/16/2023 17:53	1m, 2s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/13/2023 19:09	58s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/13/2023 10:59	1m, 2s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/12/2023 13:42	55s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/7/2023 10:26	49s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/6/2023 10:22	53s
Solar Charger - Solar PV array [279]	Automatic monitoring	Error code: #67 - No BMS	2/5/2023 15:36	51s

Multiplus-II cerbo gx Lithium Battery smart solar charging behaviour

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Answer 1 · 2023-04-20T14:09:16Z

derrick thomas answered · Apr 20, 2023 at 02:09 PM

Loss of communication to bms. Are you using a victron data cable between the bms and cerbo? Some aftermarket and diy data cables can be problematic.

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terror-storm commented · Apr 20, 2023 at 02:48 PM

The Cerbo and BMS are connected to the overall RV-C network along with other devices. We are using an Ethernet cable for the Cerbo to interface into the network (with the end modified to connect to CAN), a cable from the BMS to the network (also modified), and a few UTP cables and connectors between the two.

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Answer 2 · 2023-04-20T18:40:36Z

Alexandra answered · Apr 20, 2023 at 06:40 PM

@terror_storm

If it is happening during solar hours then maybe revise the voltages a bit. Maybe it is tripping and switching off. Hence the loss of comms.

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