Lithium Smart and Lynx Smart BMS battery codes

The voltage of one or more cells falls below the pre-alarm threshold.

Charge the battery as soon as possible.

Original: “Under voltage warning (pre-alarm)” · Victron source

The voltage of one or more cells is below the configured Allow-To-Discharge threshold — discharge has been blocked.

Charge the battery as soon as possible.

Original: “Under voltage alarm” · Victron source

The voltage of one or more cells is too high.

Switch off all chargers immediately and ask the installer to check that each charger is controlled by the BMS “charge disconnect” contact. With correct control, this situation should not occur — the BMS disconnects chargers before this alarm is triggered.

Original: “Over voltage alarm” · Victron source

The battery has reached the lower temperature threshold — charging is blocked.

Charging will resume automatically when the temperature rises above the configured threshold. More: LiFePO₄ in winter.

Original: “Under temperature alarm” · Victron source

The battery has reached the upper temperature threshold — charging is blocked.

Ensure ventilation and free space around the battery. Reduce the charging current or load.

Original: “Over temperature alarm” · Victron source

The settings data in the battery memory has been lost.

In VictronConnect, restore the factory settings. If the fault does not clear, report it to the dealer or distributor, giving the serial number and battery software version — according to the manufacturer, this fault should not occur.

Original: “Settings data lost” · Victron source

There are two possible causes: a very deep discharge or damage to one or more cells, or a fault on the electronic board.

First measure the voltage at the battery terminals. If it is very low — see deeply discharged lithium battery. The manufacturer notes: do not assume straight away that this is a hardware fault — first go through the manual’s “Troubleshooting & support” section, and only then contact the dealer.

Original: “Hardware failure” · Victron source

Contact the Victron dealer or distributor.

Original: “Balancer failure” · Victron source

Contact the Victron dealer or distributor.

Original: “Internal communication failure” · Victron source

Contact the Victron dealer or distributor.

Original: “Overlapped voltage error” · Victron source

Contact the Victron dealer or distributor.

Original: “Balancer update error” · Victron source

Charge the battery or reduce the load to avoid the system shutting down.

Original: “Low cell voltage” · Victron source

Reduce the current (limit or switch off some loads) to avoid the system shutting down.

Original: “High current” · Victron source

Check the ambient temperature and whether the BMS fans are running. If they are, lower the ambient temperature; if not, contact the dealer.

Original: “High BMS temperature” · Victron source

Reduce the current (limit or switch off some loads) to avoid the system shutting down, and contact the dealer.

Original: “Warning bad contactor” · Victron source

Check the cable between the BMS and the battery.

Applies to: Lynx Smart BMS NG only.

Original: “BMS cable fault” · Victron source

The loads will be switched off (by the ATD contact and/or via GX) if the cause — for example low battery voltage — does not clear. In Lynx Smart BMS this happens after 30 seconds. The warning is always accompanied by a second message with the actual cause.

Original: “Load will disconnect” · Victron source

Charge the battery or reduce the load to avoid the system shutting down.

Original: “Low SoC” · Victron source

Check the communication wiring.

Original: “VE.Can disconnected” · Victron source

Problem with the battery software update.

Applies to: Lynx Smart BMS NG only.

Original: “Firmware update failure” · Victron source

Check the cable between the BMS and the Lynx Distributor (the letter in the message indicates the distributor).

Originally: “Communication with distributor A–H lost” · Victron source

Charge the battery. The system will switch the loads back on automatically when the battery has charged sufficiently.

Original: “Low cell voltage” · Victron source

Reduce the charge current or switch off some loads. The system will try to re-enable the chargers or loads after 5 minutes.

Original: “High current” · Victron source

Check the cable between the BMS and the battery.

Applies to: Lynx Smart BMS NG only.

Original: “BMS cable fault” · Victron source

The loads were switched off by the ATD contact (on Lynx Smart BMS also via GX). Clear the alarm by charging the battery. On Lynx Smart BMS, if the issue is not resolved, the contactor will eventually open and the DC system will be disconnected.

Original: “Load disconnected” · Victron source

Charge the battery. The system will switch the loads back on automatically when the battery has charged sufficiently.

Original: “Low SoC” · Victron source

Battery temperature is too high for charging. Try to lower the ambient temperature.

Applies to: Lynx Smart BMS NG only.

Originally: “High battery temperature” · Victron source

Check the installation and replace the fuse. The message shows the fuse name assigned in VictronConnect, or the default “Fuse_N”. Before replacing the fuse, find the cause — a blown fuse means an overload or short circuit.

Originally: “Fuse "Fuse_N" is blown” · Victron source

Check that all batteries are connected correctly.

Originally: “Battery init failure” · Victron source

Check that the BMS cable loop is closed.

Originally: “No battery found” · Victron source

Check that all batteries are connected correctly.

Originally: “Invalid number of batteries” · Victron source

The battery voltage is too high or too low — outside all system ranges (below 9 V or above 60 V). Measure the battery voltage and check the battery settings in VictronConnect.

Originally: “Battery voltage not allowed” · Victron source

Contact the dealer.

Original: “Hardware error” · Victron source

The load resistance is too low to pre-charge the capacitors. Disconnect or reduce some of the DC loads.

Originally: “Pre-charge error” · Victron source

Contact the dealer.

Originally: “Contactor error” · Victron source

Check the battery M8 cables.

Originally: “BMS cable error” · Victron source

Check the battery voltage setting in VictronConnect. On Lynx Smart BMS NG, also check that the battery BMS cables are connected correctly.

Originally: “Wrong system voltage” · Victron source

The load capacity is too large for pre-charging. Disconnect some of the DC loads.

Originally: “Pre-charge timeout” · Victron source

Lynx Smart BMS: check the ATC/ATD wiring and make sure the loads and chargers are controlled through ATC/ATD. Lynx Smart BMS NG: check the ATC/ATD wiring and CAN communication, make sure the loads and chargers are controlled through ATC/ATD, and after the cause has been cleared, switch the unit off and on.

Originally: “ATC/ATD failure” · Victron source

Contact the dealer.

Originally: “Calibration data lost” · Victron source

The settings are corrupted. In VictronConnect, restore the default settings.

Original: “Settings data lost” · Victron source