58MAINTENANCE WTC 600 LP / MPService Handbook 08.20044.5.3 Malfunctions of the RO Control and Metering PumpIndication Malfunction Cause Corrective Action Chap./Fig.Indication of RO Fuse defective Have replaced by ETL,control dark electrician diagramin switchcabinetShort circuit, Replace defective partsgeneralSolenoid valve Replace defective parts ETLdefectiveMotor winding Replace defective parts ETLdefectiveWater level in Pump does not Suction line untight Retighten screwed ETLcontainer is draw in fittings. Replaceconstant for suction linedaysSuction line Flush or replaceclogged suction lineCrystals, debris in Clean valves 4.2the valves(metering head)Membrane torn or Replace membrane 4.2membrane push-rod torn outPump does not Air in the suction Bleed pumpmeter line and in themetering headLift adjustment a While the pump iszero running, turn in “+”direction (adjustmentvalues, see 3.3.1)Crystals, debris in Clean valves 4.2the valves(metering head)Valves not Check correct line-up ofmounted correctly valves and correct,if required (direction ofarrow!)Injection fitting Check direction of flowblocked and correct, if required,or eliminate plug(direction of arrow!)Table 30
