Power and Alarm LED definitions and troubleshooting
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LEDs | LED behaviour | Operational mode | Troubleshooting |
|---|---|---|---|
 | Green POWER LED off. Red ALARM LED off. | The inverter has been switched off, either directly or via its remote on/off connector, or the inverter is not powered. | Check the ON/OFF/ECO switch: it should be in ON position or in ECO position. To check if the inverter is operational, turn the switch to OFF and then to ON. If not operational, check the following:
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 | Green POWER LED on. Red ALARM LED off. | The inverter has been switched on and is operational. | n/a |
 | Green POWER LED blinking slow with a short pulse. Red ALARM LED off. | The inverter has been switched to ECO mode and is in "search" state. In other words, the inverter load is lower than the "Wake up power" setting. the inverter sends a search pulse at regular intervals to check if a load has been connected or has been turned on. | If the inverter keeps switching on and off while there is a load connected, the load may be too small compared to the actual ECO mode settings. Either increase the load or change the "wake up power" setting. |
 | Green POWER LED on. Red ALARM LED on. | Overload warning. The inverter is indicating that the AC load is larger than the inverter rating and that if this situation continues, the inverter will switch off due to an overload alarm | Reduce the AC load |
 | Green POWER LED blinking with a fast double pulse. Red ALARM LED on. | Overload alarm. The inverter has shut down due to prolonged overload and will no longer automatically restart. | Remove the cause of the overload and then restart the inverter by switching it off and then back on again. For more information also see the Protections and automatic restarts chapter. |
 | Green POWER LED on. Red ALARM LED blinking slow. | Low battery voltage warning. The battery voltage has dropped below the "Low battery alarm" voltage. Should the battery voltage drop any further, the inverter will switch off on a "Low battery voltage alarm". | Charge the battery and/or turn AC loads off. Also check if all battery cable connections have been tightened. Do the battery cables have a sufficient thickness, is the battery full and is the battery still in good working order? |
 | Green POWER LED on. RED ALARM LED blinking fast. | High Battery voltage warning. The battery voltage is too high. Should the battery voltage increase any further, the inverter will switch off on a "High battery voltage alarm". | Reduce the DC input voltage, check if the battery voltage is correct and if the battery bank is wired correctly. Also check if there perhaps are faulty or incorrect chargers or equipment with a faulty charge regulator. |
 | Green POWER LED on. Red ALARM LED blinking with a fast double pulse. | High temperature warning. The internal temperature is too high. If the temperature increases any further, the inverter will switch off on a "High temperature alarm". | Reduce the AC load and/or move the inverter to a better ventilated area. |
 | Green POWER LED on. Red ALARM LED blinking with a fast single pulse at longer intervals. | High DC ripple warning. The DC voltage has a too high ripple voltage. If the ripple voltage increases any further, the inverter will switch off on a "High DC ripple alarm". | Check if all battery cable connections have been tightened. Do the battery cables have a sufficient thickness? DC ripple is related to a voltage drop over the battery cables. For more information on DC ripple and how to prevent it, see the Wiring Unlimited book. |
 | Green POWER LED blinking with a fast double pulse. Red ALARM LED blinking slow. | Low battery voltage alarm. The inverter has shut down due to low battery voltage. | To restart the inverter, charge the battery or switch the inverter off and then back on again. Check the battery voltage at the battery terminals of the inverter. Also check the DC fuses, cables, and cable connections For more information also see the Protections and automatic restarts chapter. |
 | Green POWER LED blinking with a fast double pulse. RED ALARM LED blinking fast. | High battery voltage alarm. The inverter has shut down due to high battery voltage. | Reduce the DC input voltage, check if the battery voltage is correct and if the battery bank is wired correctly. Also check if there perhaps are faulty or incorrect chargers or equipment with a faulty charge regulator. The inverter will automatically turn back on when the battery voltage has dropped to an acceptable level. For more information also see the Protections and automatic restarts chapter. |
 | Green POWER LED blinking with a fast double pulse. Red ALARM LED blinking with a fast double pulse. | High temperature alarm. The inverter has shut down due to high temperature. | Wait until the inverter has cooled down. The inverter will automatically turn back on when its internal temperature has dropped to an acceptable level. Check the environment of the inverter, can the ventilation be improved, or can the inverter be moved to a cooler location? For more information also see the Protections and automatic restarts chapter. |
 | Green POWER LED blinking with a fast double pulse. Red ALARM LED blinking with a fast single pulse at longer intervals. | DC ripple alarm. The inverter has shut down due to high DC ripple. | Check if all battery cable connections have been tightened. Do the battery cables have a sufficient thickness? DC ripple is related to a voltage drop over the battery cables. For more information on DC ripple and how to prevent it, see the Wiring Unlimited book. To restart the inverter switch the inverter off and then back on again. For more information also see the Protections and automatic restarts chapter. |
 | Green POWER LED and red ALARM LED blinking fast in an alternating fashion. | Firmware update active. | Wait until the update has been finalized. If the firmware update fails retry the firmware update. |
 | Green POWER LED and red ALARM LED blinking slow in an alternating fashion. | Calibration or parameter error. | Contact your Victron supplier for support. |