Graco EcoQuip - Blast Air Flow and Pump Issues

Troubleshooting
Problem Problem
Problem
Cause Cause
Cause
Solution Solution
Solution
Thepotdoesnothavea
suf󰘰cientamountofabrasive.
SeeRe󰘰llingthePotwithAbrasive,page20.
Thesystemisnotproperly
setup.
SeeSettingUptheEquipment,page13.
Makesurethepotpressureisproperlyset.
Thepotpressuremustbeset30psi(2bar,
0.2MPa)abovetheblastpressure.Make
suretheselectorvalveissettoBLAST.The
abrasiveballvalvemustbeopen.Theabrasive
meteringvalvemustbeatleast1/8turnopen.
Thereisanobstructioninthe
mediacircuit.
SeeFlushingtheDiaphragmValve,page30.
Thediaphragmvalveisnot
working.
SeeRepairingtheDiaphragmValve,page31.
Noabrasive󰘱owsfromthe
nozzleduringblastmode.
Thereisblockageinsidethe
potorinsidetheabrasive
hosebetweenthepotand
thepanel.
Makesuretheballvalveisclosed,then
disconnectthecam-lockcoupler.Openthe
abrasiveballvalveslightlyandmakesure
abrasiveis󰘱owingfromtheabrasivehose.
Ifnot,followtheshutdownprocedure(see
ShuttingDown,page21).Thoroughly󰘱ushthe
potandthemediahoseafterdrainingmedia
andwater.
Theblastregulatorisnot
adjustedtothecorrect
pressure.
Adjusttheblastregulatortothedesired
pressurewhiletheblastcontrolisengaged.
Thetubingtothemainair
regulatorisnotproperly
connected.
Con󰘰rmthatthetubingfromtheblastregulator
tothemainairregulatorisintact.See
HoseSchematic,page42.
Theblastairregulatoris
malfunctioning.
Replacetheblastairregulator.
Noblastair󰘱owwhenthe
blastcontrolisengaged.
Thewaterpumpcycles
whiletheblastcontrol
engaged.
Themainairregulatoris
malfunctioning.
SeeRepairingtheMainAirRegulator,page29.
Theairsupplyisinadequate.Makesuretheairinletpressuregaugereads
100-125psi(6.8–8.6bar,0.68–0.86MPa).If
thegaugedoesnotread100–125psi,check
theaircompressorforpropersetup.
TheEmergencyStopis
engaged.
DisengagetheEmergencyStop.
Theelectricblastcontrol
circuitismalfunctioning.
Inspectthehosecablefordamagedorshorted
wiring.Checkthebatteryandcontrolpanel
connections.MakesuretheDCpowersource
is12V.Checkthe3Afuseinsidethecontrol
panel,andreplaceitifnecessary.Checkthe
current󰘱owinthecircuit.Ifcurrentexists,
replacetherelay.
Noblastair󰘱owwhenthe
blastcontrolisengaged.
Thewaterpumpdoes does
does
not not
not
cyclewhiletheblastcontrol
engaged.
Thepneumaticblastcontrol
circuitismalfunctioning.
SeePneumaticBlastControlCircuit,page28.
334142F25