Hi I am a new Dutch member and I live in Portugal, I have a Hayward AQR-Pro 230v yr 2011 and the following problem, when I switch on the unit the display tells me +28V +1,7 Amp 0,3gr/l (much to low) salt when I change with the + button to - Voltage the display tells -25,0V + 6,6 Amp and 3.1...