Graco EcoQuip 2 EQm [28/74] 3a3489c

Graco EcoQuip 2 EQm [28/74] 3a3489c
Troubleshooting
Problem Problem
Problem
Cause Cause
Cause
Solution Solution
Solution
Theabrasiveballvalveis
closed.
SeeSettingUptheEquipment,page14.
Theabrasivemeteringvalve
isnotproperlyset.
SeeSettingUptheEquipment,page14.
Thepotdoesnothavea
sufcientamountofabrasive.
SeeRellingthePotwithAbrasive,page21.
Thepinchvalvedoesnot
open.
Engagetheblastcontrolswitch(B)andcheckforactuation
ofthepinchvalve.Ifthereisnoactuation,disconnectthe
orangetubingatthepinchvalve.Ifthepinchvalveopensand
sourceairiscomingfromtheorangetubing,conrmthatthe
tubingiscorrectlyrouted.Ifthepinchvalvedoesnotopen,
replaceit.Ifthepinchvalveopensandthereisnosourceair
comingfromthetubing,inspectthemufersonthe4-way
valvefordebris.Ifdebrisisnotpresent,cleanorreplacethe
4-wayvalve.
Thereisanobstructioninside
thepotorinsidetheabrasive
hosebetweenthepotandthe
enclosure.
FollowDrainingthePot,page22,followedbythe
PressureReliefProcedure,page10.Withtheabrasive
hosedisconnected,inspecttheinteriorofthepinchhose
forobstructionsordebrisandreplaceifnecessary(see
ReplacingthePinchHose,page33).Removethetri-clamp
fromthebottomofthepot.Inspectthebottomofthepotand
theabrasivehoseforobstructionsordebris.
Thepotpressureistoolow.Withtheblastcontroldisengaged,allowthepottopressurize
andwaitforthepumptostall.Ifthepotpressuregaugedoes
notreach185psi(12.75bar,1.275MPa),seethe“Unableto
llorpressurizethepotwithwater”problemlistedinthistable.
WhileinBLASTmode,
withtheblastcontrol
switch(B)engaged,
airisowingfromthe
nozzlebutlittleorno
abrasiveisowingfrom
thenozzle.
Theblastpressureistoohigh.
Iftheblastpressuregaugereads160psi(11.03bar,1.10
MPa)orgreater,itmaynotbepossibletoachievegreater
than15CPMontheMediaTrak.Thisismorecommonwith
nemeshabrasiveusage.Decreasetheblastpressureto
100psi(6.9bar,0.69MPa)toseeifCPMcanbeincreased.
283A3489C

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