14 P/N:80234885.5.3 Initial settings of the chair5.5.2 Chair position buttonsSymbols Functions Symbols FunctionsBackrest Up SetBackrest Down Spitting positionChair Down Program Chair Positions 1Chair up Program Chair Positions 1Original position Program Chair Positions 10PUser's Manual of Beyond 300/301 Delivery SystemNotice: The hydraulic system shall have the initial setting of the chairin following situations:First installation or replacement of mainboardInsert/replace/repair any position feedback potentiometer or wiringReset or replace the limit switch.Reset the motion range of the chair.Caution: When setting up the system, do not extent the maximumrange of the cylinder to prevent the hydraulic pump from workingimproperly!