Kitz RDH Series - Page 32

29/31
DocumentNo.:KE-4051-00
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3Troubleshooting
Thetablebelowprovidesthegeneralguidancefortroubleshootingofelectriccompactballvalves.Forfurther
technicalassistance,contactKITZ.


MainCause Cause RemedialMeasure PreventiveMeasure
Controlcircuit
failure
・Incorrectpowersupply ・Replacetheproductif
excessivevoltagewas
applied.
・Checkthevoltage
specification.
・Incorrectcontrolcircuit
・Badconnectionsand
looseterminals
・Replacetheproductifthereis
stillanyabnormality.
・Checkthecircuitwiththis
manualandmakesurethat
thewiringiscorrectly
performed.
FailureofActuator
Damageor
deterioration  of
internalparts
・Intrusionofwater
・Submergenceoftheactuator
・Improperinstallationdirection
・Improperwaterproofing
・Replacetheproduct. ・Avoidinstallingtheproductat
theplacewheredangerof
submergingispredictable.
・Correcttheorientationofthe
product.
・Waterproofthecable
connectionstopreventwater
fromenteringtheactuator
duetocapillarity.
・Excessive pressure rise (valve
cavityandpipeline)
・ Replacetheproductif  ・Refertothecorrective
measureagainstexcessive
pressurerise.
・Deformationofvalvedueto
excessivelyscrewingthepipe
intothevalve.
・Replacetheproduct. ・Applypropertorquetoscrew
thevalve.
・Adherenceofpipesealing
materialtotheseat
・Replacetheproduct. ・Applyproperamountof
sealingmaterial.
・ Inclusion of foreign particles
intotheballseatarea
・Replacetheproduct. ・Installthestraineronthe
upstreamside.
・Thoroughlyflushtheproduct
beforeoperation.
・Corrosionoftheball ・Replacetheproduct. ・Reselecttheappropriatevalve
materialsuitableforthe
servicefluid.
Novalveactuation
FailureofValve
Excessivelyhigh
valveoperation
torque
*
・Gallingofthestemshaft ・Replacetheproduct. ・Reselecttheappropriatevalve
materialsuitableforthe
servicefluid.
・Highfrequencyof
closing/openingoperation
・ Replacetheproductifthe
errorpersistsunderthe
correctspecification.
・Placesufficientintervals
betweentheclose-open
operations.
Outof
specifications
・Excessively high or low service
temperature
・ Replacetheproductifthe
errorpersistsunderthe
correctspecification.
・Makesuretheservice
temperaturesarecontrolled
withinthespecifiedrange.
FailureofActuator
Incorrectcircuit
・Paralleloperation
・ Replacetheproductifthe
errorpersistsunderthe
correctspecification.
・Checkthecircuitwiththis
manualandmakesurethat
thewiringiscorrectly
performed.
Abnormalmovementofthevalve
Failureof
Valve
Excessivelyhigh
valveoperation
torque

・Initialphenomenondueto
excessivelyhighvalveoperation
torque
・Replacetheproduct. ・Samepreventivemeasures
against*intheabovecolumn
areapplied.
Note:Takeappropriatepreventivemeasurestoavoidrecurrenceofinternaldamagewhichmayresultinthereplacementoftheproduct.