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Ground fault circuit interrupter (K3000 Wet) Ground fault circuit interrupters are for protection in case an electrical fault should occur. The LED indicates that the ground fault circuit interrupter is on and that the machine can be switched on. If the LED is not on, push the RESET button (green). Check the ground fault circuit interrupter •Connect the machine to the socket. Push the RESET button (green) and the red LED lights up. •Start the machine. •Push the TEST button (blue). •The ground fa