Graco ProControl 1KE Plus - Page 59

Troubleshooting
Low󰘱ow.
Inadequateairsupplythroughthe
I/Ptransducer.
Increaseincomingairpressure.
Flowcontrolnosettlingtosetpoint.
Pressureor󰘱owPIDK-Factors
arenottuned.
SeeSetupScreen10:PIDData,
page51.
Forautomaticoperation,verify
thepressureswitchelectrical
connection.Checkthattheswitch
closeswhenthegun󰘱uidsolenoid
isactivated.
Formanualoperation,verifytheair
󰘱owswitchelectricalconnection.
Checkthattheswitchcloseswhen
theguntriggerisactivated.
Flowcontrolover-drivingtohigh
󰘱owrates.
GunTriggersignalnot
synchronizedwith󰘱uid󰘱ow
valve.
The󰘱owcontrolmayactivate
whentheatomizingairis󰘱owing
withoutany󰘱uid󰘱ow.
•Ifthisisbecauseofadusting
procedure,the󰘱owcontrolmay
over-drivethe󰘱uidpressure
untilitcanconverge.
•Ifthisisbecauseofsystem
startup,thisisnormalandthe
󰘱owcontrolshouldeventually
react.
Checkincomingsystemair
pressure.Thisshouldbeatleast
10psi(0.7bar)higherthanthe
target󰘱uidpressure.
Checkincoming󰘱uidpressure
frompump.Thisshouldbeat
least10psi(0.7bar)higherthan
thetarget󰘱uidpressure.The
pumpmustbeabletosupplythis
pressureatthetarget󰘱owrate.
CheckI/Ppilotlineoutput
pressure.
Higher󰘱uidpressurecannotbe
achieved.
Low󰘱uidpressureafterthe󰘱uid
regulator.
Checkpoweroutputofthebarrier
thatpowersthesystem.At20mA,
for100psi(6.9bar),thisshould
beatleast13.5volts.
Checkforupwardssettlingofair
bubbles.
Checkfordownwardssettlingof
solids,suchasmetallics.
Unstable󰘱owwithCoriolismeter.Presenceofbubblesorsediment.
ConsulttheCoriolisMetermanaul
(seeRelatedManuals,page2).
Coriolismetershows󰘱owwhen
no󰘱uidis󰘱owing.
Low-󰘱owcutoffmaybesettoolow.Increasethelow-󰘱owcutofftojust
abovethehighestfalse󰘱owrate
thatwasobserved.
Regulatorpilotdrivestohigh
pressure.
Inadequate󰘱uidsupplyinpressure
controlor󰘱owcontrolmode.
Checkpressureand󰘱ow
capabilitiesofthe󰘱uidsupply.
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