VE.Bus errors on the Victron, MultiPlus and Quattro: what each code means and how to resolve them

The Victron investor-loaders (MultiPlus, MultiPlus-II, Quattro) report faults in two ways: by means of the Front LED and, if there is a GX device (Cerbo GX, Ekrano GX), via a VE.Bus error code visible on the GX screen, in VRM and in VictronConnect. This guide covers both and adds error code #67 relating to communication with the BMS.

LED alarms (without the GX device)

LED	Status	Reason	What to do
Low battery (flashing)	Notice	The battery voltage is approaching the cut-off threshold	Reduce the load or charge the battery (solar, mains, generator)
Low battery (permanent)	Off	Voltage below the DC cut-off (default 9.3 / 18.6 / 37.2 V)	The inverter restarts when the voltage rises. If this happens every night, the battery is undersized or at the end of its life.
Overload (flashing)	Notice	Fuel consumption close to maximum power	Collect parcels
Overload (fixed)	Off	Overload or short circuit at the AC output	Switch off all loads, restart the system and switch them on one by one. Take care with motor and compressor start-ups (3–5 times their rated current)
Temperature (flashing)	Notice	High internal temperature	Improves ventilation; leave a 10 cm gap all round
Temperature (fixed)	Off	Overtemperature	Wait for it to cool down; if the fan isn’t turning, contact SAT
Low battery + Overload (alternating flashes)	Off	DC ripple too high	Battery cables that are too long or too thin, or loose terminals. Check the connections and tighten them
Fixed Bulk + Absorption + Float	Blockade	Internal error	Restart. If the problem persists, contact support

With VictronConnect (Bluetooth via the VE.Bus Smart Dongle or MK3-USB cable), you will be able to view these alarms as text messages, along with the history.

VE.Bus error codes (with GX)

Code	Meaning	Solution
VE.Bus error 1	A device has lost communication in a parallel/three-phase system	Check the RJ45 cables between units (they must be straight-through CAT5 cables, not crossover cables) and ensure that none of the units are switched off
Error 2	New unit detected or unit removed	Run VE.Bus System Configurator or VE.Bus Quick Configure again
Error 3	Not all devices are present, or they are not all configured in the same way	Configure all units using the same file and the same firmware version
Error 4	There is no more than one device on the bus (the system is configured as parallel, but only one is visible)	Cables or power supply for the second unit
Error 5	Overvoltage at the AC output	It is usually a problem with a single unit; replace
Error 6	Error in the DDC programme	Restart; if the problem persists, contact SAT
Error 7	Slave drive with different firmware or from a different generation	Update the firmware so that they all match
Error 8	Incorrect bus hardware or cabling	Check RJ45 connectors and terminators
Error 9	Internal communication failure	SAT
Error 10	System synchronisation failed	Restart all units at the same time
Error 11	Mains or battery relay not found / ripple problem	Loose AC-in wiring or unsuitable DC cables
Error 12	Incorrect system configuration	Reconfigure using System Configurator
Error 14	Device installation error	Reconfigure or update the firmware
Error 15	AC output overcurrent	Overload in a phase or unit
Error 16	Output voltage out of range	Check that all units are set to the same voltage (230 V)
Error 17	Phase loss / master unit not connected	In a three-phase system, one phase is missing: cables or unit switched off
Error 18	AC output overvoltage	Load with energy recovery (motor, other inverter); check the installation
Error 22	This device cannot operate as a slave	Settings: switch between master and slave
Error 24	System switching protection	Restart
Error 25	Incompatible firmware	Update
Error 26	Internal ruling	SAT

General rule: in parallel or three-phase systems, All units must have the same firmware and the same configuration file. Most errors 1–4 and 7 are caused by failing to comply with this.

Error #67: BMS connection lost

This appears in Cerbo GX when CAN communication with the BMS of a managed battery has been lost (Pylontech, Pytes, ZYC, BYD LV, Victron, Lynx BMS). With DVCC active, the inverter and MPPT units stop charging for safety reasons.

• Check the Type A CAN cable (VE.Can to CAN-bus BMS) between the GX and the master battery. It’s a specialised cable, not a standard RJ45; you can find it at Victron cables.
• Check that the correct port on the GX is set to 500 kbit/s “CAN-bus BMS (LV)” (Settings → Services).
• Check that the master battery is switched on and that the CAN terminator is at the other end of the bus.
• Following a power cut, some batteries take a minute to resume posting; the error clears itself.

Further details at DVCC: what it is and how to set it up.

Other common alarms in VRM

• Low battery voltage / High voltage: VEConfigure thresholds or BMS limits. Check the battery profile.
• Grid lost: The inverter has rejected the grid due to voltage/frequency being out of range or because the grid code does not match (Spain: “Other / UNE 217002” in accordance with applicable regulations).
• Inverter overload: See also: LED Overload.
• VE.Bus system: Charge current limited by low temperature: The (lithium) battery temperature is below 5 °C and the BMS blocks charging. This is a standard safety measure.

Reset procedure

1. 1. Switch off the AC loads.
2. 2. Set the inverter switch to OFF and open the battery isolator switch.
3. 3. Wait 2 minutes.
4. 4. Close the isolator, switch on the inverter and then the GX.
5. 5. Check in VRM that the error has been resolved.

For the reference connection diagram, see Victron MultiPlus diagram.

We are authorised Victron Energy installers and provide free technical support for equipment purchased from FV Componentes. If the problem persists, please open a ticket at Technical support including the model, serial number and the link to your VRM installation. You can find diagrams and parameters on our Victron Resource Centre.