User guide



Corporate Office: 724.584.5500  Instant Access 24/7 (Parts and Service): 800.458.1960  Parts and Service: 814.437.6861
24


StartButton
DepressingtheStartbuttonwillstartthepumpandenablethecompressor.Thecompressor
(andcondenserfansifthechillerisaircooled)willstartonlyifthemicroprocessoriscallingfor
coolingbecausetheactualToProcesstemperatureishigherthantheSetpointtemperature.If
theAutostartfeatureisenabled,theAutostartsignalwillhaveprecedenceovertheStart
Button.SeetheProgramMenusectionforinstructionsonhowtoenableordisablethe
Autostartfeature.

TheStartbuttonalsoperformsan“Enter”functionwhileintheprogrammingmenu.


StopButton
DepressingtheStopbuttonwillshutoffthecompressor,pump,condenserfans(ifthechilleris
aircooled),andclearallfaultsignals.IftheAutostartfeatureisenabledandthereisan
Autostartsignalpresent,theStopbuttonwillnotstopthechiller.SeetheProgramMenu
sectionforinstructionsonhowtoenableordisabletheAutostartfeature.

Thisbuttonalsoperformsa“Cancel”functionwhileintheprogrammingmenu.


AlarmSilence/AlarmReset Button
Whenanalarmconditionispresent,thealarmLEDabovetheAlarmSilence/Resetbuttonwill
beonandred.ThefirstAlarmSilence/Resetbuttonpresswillsilencethealarmhorn(optional),
opentheremotealarmcontact(optional),andtheLEDtogglesfromredtoyellow.Thealarm
hornand/orremotealarmcontactremaindisableduntilasubsequentalarmoccurs.Asecond
pressoftheAlarmSilence/ResetbuttonresetsthestatefromAlarmtoNormalOperation.

TheHighRefrigerantPressureandPumpOverloadrequireamechanicalsafetytobemanually
resetbeforethecontrolboardcanbereset.Ifthefaultisstillpresenttheunitwillimmediately
gointoanewalarmstate.


CompressorRunningHoursButton
PressandholdtheCompressorRunningHoursButtontodisplaytheamountoftimethateach
compressorinthesystemhasbeenenabled.TheSetpointwindowwillshowwhich
compressor’susageisbeingdisplayed(forunitswithtwocompressors).Therunninghourswill
beshownintheprocessdisplaywindow.Display
ofrunninghoursisinunitsofhundredssoa
displayvalueof10wouldmean1,000hours.Therunninghourswillbedisplayedforaslongas
thebuttonisheld.Forunitswithtwocompressors,thedisplaywilltogglebetweenthetwo
compressorseverythreeseconds.Thehours
willbedisplayedforaslongasthebuttonisheld.
Controlisnotdisturbedwhilethehoursarebeingdisplayed.