332312A - E4-5 Meter-Mix Dispense System, Operation ... - Graco Inc.

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TroubleshootingTroubleshootingBefore performing any troubleshooting procedure:1. Perform Pressure Relief Procedure on page 33.2. Press the Stop Button.3. Remove air supply.4. Allow the press equipment to cool.Try the recommended solutions in the order given foreach problem to avoid unnecessary repairs. Also, determinethat all circuit breakers, switches, and controls areproperly set and wiring is correct.Common ProblemsProblem Cause SolutionUp-StrokeIf the pump continues tomove in the up direction afterall of the outlets have beenclosed, check the followingareas.Air in the MaterialAir is the most common cause of up and down-strokeerrors. Therefore, the Pump Testing procedure,page 36, should be performed a couple of times toensure the pump is void of air. An indication of air inthe pump can be seen when the pump changes directionsfrom the up-stroke to the down-stroke. If air ispresent, the pump will jump or move more rapidly inthe down direction and then begins to move slowlywhen it hits the material. To remove any air from thepump, refer to Purge and Prime the Pump, page 28,and then repeat the test again.Piston Ball CheckThe ball seat at the end of the pump piston may haveforeign material lodged in the seat preventing the ballfrom seating properly. Over time, the pressure ofabrasive silicones can damage the piston seat or pistonball requiring it to either be replaced or repaired.Careful inspection of the piston seat should be takenevery time the pump is disassembled.Piston SealThe Piston Seal prevents material leaking around thePiston during the up-stroke cycle. Piston Seal failurecan be caused by extended use or from a roughPump Cylinder wall.Pump CylinderA worn or galled cylinder wall will allow material toflow by the Piston Seal causing the pump to creep inthe up direction. Prolonged use in this state will causepermanent damage and introduce foreign object intothe chemical.Upper Rod SealThe Upper Rod Seal prevents material leaking aroundthe displacement rod. Upper Rod Seal failure can becaused by extended use or from a rough displacementrod wall.38 <strong>332312A</strong>
TroubleshootingProblem Cause SolutionDown-StrokeIf the pump continues tomove in the down directionafter all of the outlets havebeen closed, check the followingareas.Shovel Rod SealCheck Plunger (B443 Pump)Up-Stroke andDown-StrokeIf the pump fails to dispenseany material in either directioncheck the followingareas.Intake AssemblyShovel AssemblyThe seal separates the cylinder from the shovel platehousing. If it fails, material will be forced into theshovel plate housing during the down-stroke.The check plunger is controlled by a pneumatic valveinstead of material pressure. Shaft wear, plunger failure,or seat/seal damage could allow material to backflow into the pail or out the weep holes on the intakeblock.The device opens on the up-stroke and closes on thedown-stroke. It is controlled by material pressurepushing down on a ball against a seat. If either ofthese devices fail the pump will not work properly. Thesymptoms of an Intake Assembly problem can rangefrom partially cured parts (due to cross contaminationof the system) to no material on either stroke of thepump.The shovel and shovel plate work together to pullmaterial from the pail into the pump. The shovel platerises on the down-stroke so material can flow throughthe holes in the Shovel. On the up-stroke the shovelplate closes forming a seal with the Shovel that forcesmaterial into the pump housing. If either of these componentsare working improperly, the pump would failto load and dispense material.<strong>332312A</strong> 39
Page 1 and 2: OperationE4-5 Meter-MixDispense Sys
Page 3 and 4: ModelsModelsPart No.E4-5MMaximum Wo
Page 5 and 6: WarningsWARNINGFIRE AND EXPLOSION H
Page 7 and 8: Component IdentificationComponent I
Page 9 and 10: General InformationLow Level Proxim
Page 11 and 12: Screen Navigation332312A 11
Page 13 and 14: Screen Navigation332312A 13
Page 15 and 16: Screen IdentificationIconDescriptio
Page 17 and 18: Screen IdentificationMain ScreenThe
Page 19 and 20: Screen IdentificationSystem ScreenT
Page 21 and 22: Screen IdentificationAlarm History
Page 23 and 24: Screen IdentificationFault ScreensA
Page 25 and 26: InstallationInstallation1. Locate a
Page 27 and 28: Installationfacing sideways or even
Page 29 and 30: Setup3. Prime the Material Line Con
Page 31 and 32: StartupStartupMoving parts can pinc
Page 33 and 34: Pressure Relief ProcedurePressure R
Page 35 and 36: Operation10. Set the Ram Air Regula
Page 37: Testing ProceduresNOTE: Other modes
Page 41 and 42: SchematicsSchematics217110841032PB1
Page 43 and 44: Schematics502503504505506507EXP-1(E
Page 45 and 46: Schematics332312A 45
Page 47 and 48: Technical DataTechnical Data.E4-5 M

332312A - E4-5 Meter-Mix Dispense System, Operation ... - Graco Inc.

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