VFD Fault Code SLF1

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Troubleshooting / Case Studies

If any of your VFDs display a fault code of SLF1 it means there has been an interruption in communication on the Modbus network. This can happen occasionally and generally indicates a loss of power.


A simple reset of the VFDs will usually clear this error. To reset the VFD turn the disconnect for the related VFD to the OFF position, then wait for the VFD screen to turn blank (this could take up to a minute). After that, turn the VFD back on and the fault code should be gone.



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