Graco EcoQuip - Blast Control and Spray Pattern Irregularities

Troubleshooting
Problem Problem
Problem
Cause Cause
Cause
Solution Solution
Solution
Themainairregulatoris
stuckopen.
SeeRepairingtheMainAirRegulator,page29.
Theblastcontroltubingis
notconnectedproperly.
Ensureairtubingisroutedandconnected
properly.SeeHoseSchematic,page42.
Electricblastcontrolcircuitis
malfunctioning.
Inspecthosecablefordamagedorshorted
wiring.Checkbatteryandcontrolpanel
connections.EnsureDCpowersourceis12V.
Check3Afuseinsidecontrolpanelandreplace
itifnecessary.Checkcurrent󰘱owincircuit,if
currentexists,replacerelay.
Theblastcontrolisnot
engagedbutblastingstill
occurs.
Pneumaticblastcontrol
circuitismalfunctioning.
SeePneumaticBlastControlCircuit,page28.
Incorrectabrasiveisbeing
used.
Usethecorrectabrasive.See
AbrasiveMeteringValveSettings,page18.
Thepotdoesnothavea
suf󰘰cientamountofabrasive.
Re󰘰llthepotwithabrasive.See
Re󰘰llingthePotwithAbrasive,page20.
Thepotpressuresettingis
incorrect.
Performthepressurereliefprocedure(see
PressureReliefProcedure,page10)
andresetpotpressure(see
SettingUptheEquipment,page13).
TheAuto-Ventvalvedoes
notventairwhenthepotis
󰘰lled.
MakesuretheAuto-Ventvalveisworking.
PerformtheAuto-Ventcleaningprocedure
(seeCleaningtheAuto-VentValve,page32).
Thediaphragmvalveis
malfunctioning.
Performthediaphragm󰘱ushprocedure(see
FlushingtheDiaphragmValve,page30).
If󰘱ushingdoesnotsolveproblem,see
RepairingtheDiaphragmValve,page31.
Theblastspraypatternis
irregular.
Thereisblockageinsidethe
potorinsidetheabrasive
hosebetweenthepotand
thepanel.
Makesuretheballvalveisclosed,then
disconnectthecam-lockcoupler.Openthe
abrasiveballvalveslightlyandmakesure
abrasiveis󰘱owingfromtheabrasivehose.
Ifnot,followtheshutdownprocedure(see
ShuttingDown,page21).Thoroughly󰘱ushthe
potandthemediahoseafterdrainingmedia
andwater.
Theunitisnotonalevel
surface.
Placetheunitonalevelsurface.Ifthisis
impossible,theAuto-Ventmustbeonthe
highersideoftheunit.
Theinitialpotpressureisnot
setcorrectly.
Con󰘰rmthattheauto-ventvalveisworking
andsetinitialpotpressure30psi(2.0bar,0.2
MPa)abovetheblastpressure.
TheAuto-Ventis
malfunctioning.
Performauto-ventcleaningprocedure(see
CleaningtheAuto-VentValve,page32).
Astronghoserecoiloccurs
frequentlywhentheblast
controlswitchisengaged.
Thediaphragmneedstobe
󰘱ushed.
Performthediaphragm󰘱ushprocedure(see
FlushingtheDiaphragmValve,page30).
If󰘱ushingdoesnotsolvetheproblem,see
RepairingtheDiaphragmValve,page31.
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