Abrupt VE.Bus Error 24 after years of stability

I’m in rural Alaska, so my options for help are limited, particularly on a Sunday, so I would appreciate any help. At this point, however, I’m suspecting hardware failure of some kind (relay or current detection circuit), which would require new hardware and probably a service provider visit.

I didn’t install myself and access to the AC in/out terminals is impaired, so I haven’t yet been able to check for current/voltage at those points. I don’t have access to a Windows PC to check the configuration details, either.

Setup:

1x CCGX;
1x Multiplus-II 12/3000 120-50;
3x SmartSolar 100/50 MPPT charge controllers;
1x Lynx Shunt;
8x BattleBorne 100ah 12v LiFePO4 batteries;

Installed in a travel trailer.

Problem details:

The system has been working for nearly 5 years. I was updating a single charge controller’s configuration (using VictronConnect app; set to the LiFePO4 preset). Not immediately, but shortly afterwards, all AC power stopped and I have VE.Bus error 24.

Batteries are at 100%. DC power still works. PV charging still works.

After every following solution attempt, I restarted the VE.Bus system:

  • I restored the charge controller setting and even made sure all 3 match;
  • I disconnected all AC loads (no AC input);
  • Ensured latest firmware installed across all devices;
  • Toggled DVCC off and back on;
  • Killed/restored all DC power and hard-booted the Multi;
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@wutduk What happens if you disconnect the charge controllers from the ccgx? Did you upgrade the ccgx firmware too and what are the versions of the various hardware components? What is the firmware version on the multi?

You will need to also do the ve bus firmware.
This can be done over the vrm and will require a reprogram.

It’s been a crazy week! Finally have a chance to dive into this further. We’ve been getting by with generators, but this band-aid won’t last forever.

Device and Firmware Details:

  • Color Control GX (Gateway)

    • Firmware Version: v3.60
    • Remote Console on VRM: Enabled and up
    • VRM Portal Mode: Full
    • Remote Support: Enabled
    • Firmware Updates: Manual
  • MultiPlus 12/3000/120-50 120V (VE.Bus Inverter/Charger)

    • Firmware Version: 2702430
    • Product ID: 2702
    • VE.Bus Connection: VE.Bus
    • Hardware Configuration: Single unit
    • Role: Phase 1 Master
  • Lynx Shunt 1000A VE.Can (Battery Monitor)

    • Firmware Version: v1.08
  • SmartSolar Charger MPPT 100/50 (Blue)

    • Firmware Version: v1.64
    • VRM Instance: 256
  • SmartSolar Charger MPPT 100/50 (Red)

    • Firmware Version: v1.64
    • VRM Instance: 258
  • SmartSolar Charger MPPT 100/50 (White)

    • Firmware Version: v1.64
    • VRM Instance: 288

The CCGX firmware version is v3.60, but when I run ‘check update’, it shows v3.55 as though that was the most recent.

RE: disconnecting charge controllers, should I be removing all wires and data cables?

Also, what does this ‘241’ indicate here? I don’t see that on the CCGX itself (simply says ‘Disconnected’ instead of ‘AC input 241’).

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Looks like this fellow had the same “AC input 241” thing happen within a day of me having it. Does this imply a software issue or setting versus hardware?

Victron MP2 Anzeige mit Cerbo V3.62 -> Anzeige merkwürdig? (had to ChatGPT for translation).

Translation:

Title:
Victron MP2 Display with Cerbo V3.62 → Display acting strangely?

Post by Jens Rehpöhler (“Meine_Energiewende”) – Jul 3:
Hi there,

I suddenly have the following display for the MP2 on a Cerbo with VenusOS 3.62 in a 3-phase system:

(images showing current display)

Before the update, it looked like this:

(images showing previous display)

Has anyone seen this issue before? All detailed info is missing. I’m not aware of any setting to toggle this. The system itself works without any issues.

Thanks!
Jens


Reply by dennibu – Jul 4:
This is what it looks like for me… v3.62:

(images from dennibu’s setup)


Reply by Jens Rehpöhler – Jul 4:
The issue with the display occurred after disconnecting the AC connection…
After rebooting the Cerbo, it now looks like this:

(new image posted)

This has now happened with two different systems. That can’t really be a coincidence.


Reply by Dieter Ferdinand – Jul 4:
Hi,
So, if the Multi is turned off when the Cerbo is started, then all the data is missing. The data only shows up again once the Multi is turned back on. Maybe the issue is related to that.

Was the Multi turned off when the Cerbo was restarted, and afterwards the data was missing?

Cheers


Reply by Jens Rehpöhler – Jul 4:
The Multis were never off… only AC-In was disconnected. In the “Active AC Input” field, it no longer showed “disconnected,” but rather “AC Input 241…”

This all really smells like a bug. I’ll try to reproduce it on a test system over the weekend.


I’m now seeing through the VRM’s device firmware update option that, despite what the other devices think, they all have updates to install! Beginning that process now…

V3.60 has known issues with the CCGX on systems with lots of connected components and should not get updates beyond V3.55. V3.60 has been giving odd errors on busy systems as the new firmware pushes the processing power hard.

I strongly recommend installing V3.55. See below for more detail.

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@wutduk Yes, the ve.direct cables (comms cables) to establish a baseline to test from after the change to the MPPT firmware. The CCGX only has 2 x ve.direct ports so I guess one charge controller is connected to the usb with a ve.direct to usb or how are the MPPTs connected? If however if you roll the firmware back to 3.55 as @pwfarnell mentioned, it may just solve the problem if e.g. dbus overload is to blame. You can enable the dbus widget in vrm for further insight.

Here are the corrected firmware versions. they’re all up to date.

Device description Product Id Serial Number Installed Latest Updatable
Lynx Shunt 1000A VE.Can 141 0073912 HQ1949L4K5V v1.10 v1.10 Up to date
SmartSolar Charger MPPT 100/50 A057 HQ1938287HJ v1.67 v1.67 Up to date
SmartSolar Charger MPPT 100/50 A057 HQ1938CAC5P v1.67 v1.67 Up to date
SmartSolar Charger MPPT 100/50 A057 HQ1938Y9EVF v1.67 v1.67 Up to date
Color Control GX C001 Unknown v3.55 v3.55 Up to date
MultiPlus 12/3000/120-50 120V 2702 Unknown v556 v556 Up to date

After all updates and restarting the VE Bus system, the fault condition remains. At this point, I’m inclined to think it’s a hardware failure of some kind.