User guide

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Corporate Office: 724.584.5500  Instant Access 24/7 (Parts and Service): 800.458.1960  Parts and Service: 814.437.6861
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DownButton
TheDownArrowbuttondecreasesthesetpointtemperature.PressingtheDownArrowand
releasingitdecreasesthesetpointtemperaturebyonedegree.PressingtheDownArrow
buttonandholdingitdecreasesthesetpointtemperatureuntilreachingtheminimum
allowablesetpointtemperature.Inadditiontoadjustingthesetpointtemperature,theDown
Arrowbuttonadjustsvariousalarmsandsetpointvalueswhentheunitisintheprogramming
mode.
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ControlPowerOnLED
TheControlPowerlightisonandgreenwhentheControlPowerSwitchisintheONposition
and24VDCcontrolvoltageispresent.
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AutostartSignalLED
TheAutostartSignallightisonandyellowwhentheAutostartfunctionisenabledandno
Autostartsignalispresent.ItisonandgreenwhentheAutostartfunctionisenabledandthe
signalispresent.Thisfeatureallowstheunittobeturnedonandoffbyaremotecontact
closure.SwitchingthecontactsfromopentoclosesimulatespressingtheStartbuttononthe
controlpanel.SwitchingthecontactsfromclosedtoopensimulatespressingtheStopbutton.
Fromthefactory,theAutostartfeatureisdisabled.SeetheProgramMenusectionfor
instructionsonhowtoenableordisabletheAutostartfeature.
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Warning:Donotintroduceanyexternalvoltagetothesecontacts,asthiswillresultindamageto
themicroprocessor.
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PumpLED
ThePumpLEDissolidgreenwhileinnormalrunningoperation.Itwillflashrediftheoverload
safetytrips.
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HotGasBypassLED
TheHotGasBypassLEDwillpulseorbeilluminatedsolidlywhenthechillerisoperatingat
partialload.Underpartialload,thehotgasbypassvalveisopenedinorderforthechillerto
maintainaconstantToProcesstemperature.Thehotgasbypassvalveopenstoavariable
percentage.
TheLEDindicatesanapproximateopeningpercentagebypulsingforvarying
amountsoftime.IftheLEDisilluminatedfor5seconds,thatmeansthatthevalveisopen50%,
whileifitisopenedfor10seconds,itisopen100%.ThelongerthatthisLEDstayson,themore
unusedexcesscapacityisavailablefromthechiller.IfthePartialLoadLEDstaysoff,thechiller