Troubleshooting
Lowow.
Inadequateairsupplythroughthe
I/Ptransducer.
Increaseincomingairpressure.
Flowcontrolnosettlingtosetpoint.
PressureorowPIDK-Factors
arenottuned.
SeeSetupScreen10:PIDData,
page51.
Forautomaticoperation,verify
thepressureswitchelectrical
connection.Checkthattheswitch
closeswhenthegunuidsolenoid
isactivated.
Formanualoperation,verifytheair
owswitchelectricalconnection.
Checkthattheswitchcloseswhen
theguntriggerisactivated.
Flowcontrolover-drivingtohigh
owrates.
GunTriggersignalnot
synchronizedwithuidow
valve.
Theowcontrolmayactivate
whentheatomizingairisowing
withoutanyuidow.
•Ifthisisbecauseofadusting
procedure,theowcontrolmay
over-drivetheuidpressure
untilitcanconverge.
•Ifthisisbecauseofsystem
startup,thisisnormalandthe
owcontrolshouldeventually
react.
Checkincomingsystemair
pressure.Thisshouldbeatleast
10psi(0.7bar)higherthanthe
targetuidpressure.
Checkincominguidpressure
frompump.Thisshouldbeat
least10psi(0.7bar)higherthan
thetargetuidpressure.The
pumpmustbeabletosupplythis
pressureatthetargetowrate.
CheckI/Ppilotlineoutput
pressure.
Higheruidpressurecannotbe
achieved.
Lowuidpressureaftertheuid
regulator.
Checkpoweroutputofthebarrier
thatpowersthesystem.At20mA,
for100psi(6.9bar),thisshould
beatleast13.5volts.
Checkforupwardssettlingofair
bubbles.
Checkfordownwardssettlingof
solids,suchasmetallics.
UnstableowwithCoriolismeter.Presenceofbubblesorsediment.
ConsulttheCoriolisMetermanaul
(seeRelatedManuals,page2).
Coriolismetershowsowwhen
nouidisowing.
Low-owcutoffmaybesettoolow.Increasethelow-owcutofftojust
abovethehighestfalseowrate
thatwasobserved.
Regulatorpilotdrivestohigh
pressure.
Inadequateuidsupplyinpressure
controlorowcontrolmode.
Checkpressureandow
capabilitiesoftheuidsupply.
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