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Gilbert JacksonSep 23, 2025
What to do if Vacon Inverter shows Input Switch in wrong state?
- SsandovalthomasSep 23, 2025
If your Vacon Inverter indicates that the Input Switch is in the wrong state, check the input Switch.

What to do if Vacon Inverter shows Input Switch in wrong state?
If your Vacon Inverter indicates that the Input Switch is in the wrong state, check the input Switch.
What does 'Safe disable' mean on a Vacon Inverter and how to fix it?
The 'Safe disable' message on a Vacon Inverter indicates that the OPTAF board input has been opened. Cancel Safe Disable if this can be done safely.
How to troubleshoot overcurrent or overvoltage on a Vacon Inverter?
If your Vacon Inverter is showing an overcurrent or overvoltage error, it means the AFE has detected too high a current in the cables or the DC-link voltage has exceeded the drive limit, possibly due to high overvoltage spikes in the supply. Check the input voltage.
Why does my Vacon Inverter show an input phase supervision fault?
An input phase supervision fault on your Vacon Inverter indicates a missing input line phase. Check the supply voltage, fuses, and cable.
What causes a 'Line Sync Fail' on a Vacon Inverter?
A 'Line Sync Fail' on your Vacon Inverter indicates a missing input line phase. To resolve this, check the supply voltage, fuses, and cable.
What to do if a Vacon Inverter reports an earth fault?
If your Vacon Inverter is reporting an earth fault, it means the current measurement has detected that the sum of phase currents is not zero, likely due to insulation failure in the cables. Check the cables.
What causes IGBT temperature (hardware) fault on Vacon Inverter?
An IGBT temperature (hardware) fault on your Vacon Inverter indicates that the IGBT Inverter Bridge overtemperature protection has detected too high a short term overload current. Check the loading.
What does IGBT temperature (hardware) fault mean on a Vacon Inverter?
An IGBT temperature (hardware) fault on your Vacon Inverter indicates that the IGBT Inverter Bridge overtemperature protection has detected too high a short term overload current. Check the loading.
What to do if the Vacon Inverter displays a charging switch fault?
If the Vacon Inverter displays a charging switch fault, it means the charging switch is open when the START command has been given, possibly due to faulty operation or component failure. Reset the fault and restart. Should the fault re-occur, contact your local distributor.
What should I do if my Vacon Inverter shows a system fault?
If your Vacon Inverter displays a system fault, it could be due to component failure or faulty operation. Try to reset the fault and restart the Inverter. If the fault re-occurs, contact your local distributor.
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