If the red light is on, only after having disconnected the device from the mains, open the red cap of
the tank (indicated in the image above) and fill the tank using only demineralised water and the
supplied bottle. Close the cap and reconnect the device to the mains, leaving the handpiece lying
on the floor. Restart the device and let it run for about 10-15 minutes and check that the light is
blue / green again.
Turn off the device, reposition the handpiece on the arm and restart.
Check that the magnetic field output is correct.