... off the power, press 3 , 4 , 5 simultaneous (press all the time), then open the switch(on back machine. The red color), input ... turn off the power , press1 , 3 simultaneous(press all the time), and then open the switch(on back machine. red color) , input four ... handle before using.G.TroubleshootingLCD screen does not illuminate:Check On/Off power switch,power cord connection,blown fuseThe ion probe does ...