During first installation, and in case of problems, update all devices to the latest firmware. This includes the latest VE.Bus firmware and also the latest firmware in the Color Control GX.
Firmware update instructions:
To restart a system, first switch all units off, one by one. And then switch all units on again. Do this with the On / Off / Charger-only rocker-switch on the front of the device.
One of the phases in a multi-phase system has failed. Commonly because of an Overload or High temperature alarm. When this happens, the other phases will show VE.Bus Error Code 1.
Trouble shooting: Look for the failing phase, which will be the phase that is not showing VE.Bus Error Code 1. And check the LEDs on that phase to find out what the reason was for the shut down.
Diagnosing on VRM First make sure that Automatic alarm monitoring is enabled; that is necessary to create the Overload and Temperature errors in the log. You will see Overload and Temperature alarms occurring at the same time as VE.Bus Error 1.
Note for split- and three-phase systems: VRM, nor the CCGX, will indicate on which phase the overload or the temperature alarm occured. To find out on which unit the error occurs, go to system after it has switched off. And look on the LEDs. The unit with the overload or temperature alarm, will have the corresponding alarm LED lit continuously. The other units will indicate a VE.Bus error, indicating that they miss one unit.
This should never happen, contact Victron service.
Possible causes and solutions:
The master device is configured to run in a parallel-, split- and/or three-phase system, but cannot find other devices on the bus.
Multiple possible causes:
1. During a system restart
Error 4 can be seen temporarily while the system restarts after an error. Not a real error in that case, no need to investigate.
2. Because of issues in cabling
Faulty cables. Check the communication cables. Don't use self made cables.
This problem can occur when the AC wiring of one of the slave units is not connected properly, or not connected at all.
Check the AC wiring.
This means: error in an Assistant. To solve, follow these steps:
A VE.Bus BMS device is connected but there is no Assistant loaded which handles the VE.Bus BMS.
Solution: configure the use of the VE.Bus BMS in one of the Assistants.
This typically happens during a system restart, and is then not a real error; no need to investigate.
For example this screenshot from the Color Control GX:
The real problem is Error 1. In this example it was caused by switching device L2 off with the front toggle switch. It was then quickly followed by Error 3. And when switching device L2 back on, briefly Error 10 is visible, followed by full recovery.
Note: System restarts can also be triggered when using Remote VEConfigure.
Occurs when the relay test of a Multigrid fails. The relays are automatically self-tested every time before the MultiGrid connects to mains.
Most likely the test fails due to an installation error:
If the failure is not triggered by one of the above conditions a hardware failure might be the cause, contact your Victron dealer.
Most probably a short circuit in the communication cables.
Another possibility, very rare though, is a broken component on the board. Return the device to the nearest service point for repair.
Update firmware to latest version: VE.Bus dongles are no longer necessary.
This error can only occur on systems with multiple devices installed per phase. For example a single phase installation with two or more devices in parallel, or a three-phase installation with six or more devices.
Error 17 will only appear on slaves. You'll see it when its phase-master is no longer communicating on the VE.Bus network.
If nothing can be found and the failure persists a hardware error might be the cause. Contact your distributor, and also report the exact LED indication of the Master and all slaves in that phase.
Solution: check if AC wires are not swapped by accident. There can never be voltage on the AC out when a unit is switched off.
This device is an obsolete and unsuitable model. It should be replaced.
There is a back-feed (or 'anti-islanding') relay present on the AC input of each unit. This relay is automatically opened during periods of AC input loss (e.g. grid or generator failure) as a safety mechanism to avoid the back-feeding of AC energy 'upstream'.
Error 24 is raised when a Multi or Quattro detects current flowing through a back-feed relay during a period when the relay should be open - which means that the relay did not open when it should.
This should not occur in a correctly installed and sized system. Possible causes in order of probability:
Diagnostic notes for multi-unit clusters showing error 24
With all Multis or Quattros set to 'off' on their front panel rocker switches and with AC power presented to the input of the system, there should be no AC present on the AC-1 output terminals.
If AC is present on the output side while the units are switched off, this energy is flowing via the stuck back-feed relay. AC is also being back-fed into the inverter output circuitry as a result, and this may result in all units audibly 'humming' (even though they are set to be 'off').
In a parallel-wired cluster, one faulty relay will make it appear that all units wired in parallel are faulty. To determine which unit is really at fault, power the cluster down and un-wire all AC inputs and all AC outputs. Then apply DC battery power and configure each unit into standalone mode so that it starts to invert and present power to its AC output. Any unit where there is also AC energy present on the input terminals has a stuck back-feed relay and needs to be replaced.
Make sure to use the same firmware in all devices.
Solution: update all devices to the latest available firmware. Instructions here.
Should not occur. Switch all equipment off, and then on again; it will then resume operation. Contact Victron Energy if the problem persists.