Rheem HTPG EcoNet Series User manual

Unit Coolers
Troubleshooting Guide
3885 Crestwood Pkwy., Ste. 500 • Duluth, Georgia 30096
www.htpg.com • Phone: [phone] • Fax: [phone]
A member of the Rheem family of brands
HTPG-EN-TG0821

July30,2021
# Remedy
Ensurevoltageselectorswitchissettothepropersetting(115Vor230V)andpowerharnessisconnectedtocontrollerboard.
Useavoltmetertoverifythatpropervoltageispresentonterminalboard(L1,L2)onevaporator.
Inspectcontrollerboardforvisualsignsofdamage(discoloration,burnmarks,brokencomponents,etc.).Ifdamaged,replace
controllerboard.Makesurethatnewcontrollerboardhasvoltageselectorswitchtocorrectsetting(115Vor230V) before
applyingpowertotheunit.
2 Replacecontrollerboard.
Ensurevoltageselectorswitchissettothepropersetting(115Vor230V)andpowerharnessisconnectedtocontrollerboard.
Ensurepowerisconnectedtoterminalboard(L1,L2,GND)onevaporator.
Verifyfanwiringdiagramonunitandensurethatfansarewiredtocontroller:WHITEwiretoL2,BLACKwiretoAuxRelay1on
controllerboard,REDwiretoAuxRelay2oncontrollerboard.VerifywiresfromAuxRelays1and2areconnectedtoL1on
terminalboard.VerifyeachoftheECfanmotorshasallthewiresconnected(WHITE,BLACK&RED).VerifyAuxRelaystatus:
whenAux1RelayisON,fansrunatfullspeed;whenAux1andAux2RelaysarebothON,fansrunathalfspeed.LEDwillturn
ONnexttoeachrelayoncontrollerboardtoindicaterelayisactive.UsercanalsoverifyAuxRelay1and2statusviadisplay
underStatus →Outputs→AuxRelay#1/AuxRelay#2 .
Replacefanmotor.
Verifyfanbladesandfanguardsarefreeofobstruction.
Oncontrollerdisplay,gotoSettings →SystemEnabled andensureitissettoYES.
ControlleriswaitingonEvapTemp1(andEvapTemp2onDualCoilunits)togetcoldenoughbeforeallowingfanstorun.If
unitissettoFREEZER,EvapTemphastogetbelow35Fforfanstorun;ifunitissettoCOOLER,EvapTemphastogetbelow55F
forfanstorun.VerifyAuxRelaystatus:whenAux1RelayisON,fansrunatfullspeed;whenAux1andAux2Relaysareboth
ON,fansrunathalfspeed.LEDwillturnONnexttoeachrelayoncontrollerboardtoindicaterelayisactive.Usercanalso
verifyAuxRelay1and2statusviadisplayunderStatus→Outputs→AuxRelay#1/AuxRelay#2 .
IfunitissettoFreezer,itcouldbedefrosting. Waitfordefrostcycletofinish.
VerifyfanwiringdiagramonunitandensurethatREDwireisconnectedtoAuxRelay2oncontroller,andconnectedtoevery
fanmotor.VerifywirefromAuxRelay2isconnectedtoL1onterminalboard.Fansshouldgotohalfspeedwhenbox
temperaturesetpointissatisfied.VerifyAuxRelay2statusviaLEDoncontrollernexttotherelayconnectors,andviadisplay
underStatus →Outputs→ AuxRelay#2 .
VerifyiftheunitinstalledhasPSCfanmotors.PSCfanmotorsoperateatfullspeedonlyorOFF.Therewillnotbeawire
connectedtoAuxRelay#2.
VerifySetpointandSpaceTempreading.IfSpaceTempishigherthanSetpointplustheSetpointControldifferential,allowthe2
minuteminimumofftimetofinishforcoolingtostartagain.
IfcontrollerhassoftwareversionHT‐PG01‐00‐01‐13orearlier,andisconfiguredasCooler,theairdefrostcyclewillrunthefans
athalfspeed.Morerecentsoftwareversionswillhavetheairdefrostcyclerunthefansatfullspeed.Allowtheairdefrost
cycletofinish;iffansdonotgotofullspeedwhencoolingstartsagain,proceedtonextpossiblecausebelow.
Whencoolingisenabled(EXVisopen),verifyEvapTemp1(andalsoEvapTemp2onCenterMountunits)getscoldenough
(under35FforFreezer,under55FforCooler).IfEvapTempreadingissignificantlyhigher(warmbox,malfunctioningEvap
Tempsensor),thefanswillremainoffinitially,thenrunat50%speedafteransometimeifthetemperaturestillhasnot
dropped.
VerifythatthereisnovisibledamageorburnmarksontheAuxRelays.VerifythestatusofeachAuxRelayviatheLEDnextto
eachone,viadisplayunderStatus→Outputs→AuxRelay#1/AuxRelay#2. Relayoperationforfanspeedcontrolisasfollows:
AuxRelay#1ON=FullSpeed;AuxRelays#1&#2ON=HalfSpeed;AuxRelays#1&#2OFF=Fansoff.IfdamageontheAux
Relaysisvisible,replacecontroller.
IfAuxRelaysdonotlookdamaged,confirmthatAuxRelay#2isOFF(visuallyinspectLEDisoff,statusondisplayindicatesOFF).
PoweroffunitandtemporarilydisconnecttheredwirefromAuxRelay#2.Whenunitispoweredbackon,verifyfanspeed
whenAuxRelay#1turnson.Iffanmotorsarestillrunningathalfspeed,proceedtotroubleshootfanmotors.Reconnectred
wirewhenfinished.
Ensurevoltageselectorswitchissettothepropersetting(115Vor230V)andpowerharnessisconnectedtocontrollerboard.
Ensurepowerisconnectedtoterminalboard(L1,L2,GND)onevaporator.
Oncontrollerdisplay,gotoSettings →SystemEnabled andensureitissettoYES.
IfthecontrollerdetectsthattheSpaceTempsensorinputismissing,itwillattemptcoolingoperationinfixedintervalsbased
onpreviouslycalculatedruntimeaveragesuntilthesensorisreplaced.Also,whilethesensorisdisconnected,SpaceTempwill
read"‐60⁰F"anda"A103 SpaceTempThermistorFailure "alarmwillbegenerated(viewedonthedisplayunder
Service →CurrentAlarms ).ReplacetheSpaceTempsensorassoonaspossibletoresumenormalcoolingoperationbasedon
theconfiguredSetpoint.(Partno.08219623)
VerifyEXVisproperlyconnectedtowireharnessandthatnoneofthe4prongsarebentormissing.Verifyonwireharness
connectionatthecontrollerthatnowireshavecomeloosefromtheconnector.VerifythatcontrolleriscommandingEXVto
openbylookingatthedisplayunderStatus →EXV→ EXVCurrentPos. Todoaquickverificationifthevalveisworking,a)
disconnectpowertothecontrollerandlistenformovementoftheEXV(controllerwillforcevalvetoclosecompletelywhen
powerisdisconnected),ORb)gotoSettings →SystemEnable andsetittoNO.Reconnectpowertothecontroller,orset
SystemEnable backtoYES,andwaitacoupleofminutestolistenforEXVmovement(valveshouldopenifSpaceTempSetpoint
isnotsatisfied).SeeAddendumAonhowtotroubleshoottheEXV.
8
VerifySuctionPressurereadingonthedisplayunder Status →Sensors→SuconPressure .Ifthesystemischargedproperly,the
SuctionPressurereadingshouldstartincreasingassoonasthevalveopens.Verifyatthecondensingunitifthecompressoris
running.VerifythatpowertothecondensingunitisturnedON.Verifythatthecut‐in/cut‐outpressureswitchesatthe
compressoraresetproperlyfortherefrigerantbeingused(refertocondensingunitinstallationmanual).
EcoNetEvaporatorController TroubleshootingGuide
1
Nopowertocontroller.
Oneormorefanwiresaredisconnected.
Fanmotorcouldbedamaged.
EvapTemp1temperatureisnotcoldenough(on
SingleCoilunits);EvapTemp1andEvapTemp2
temperaturesnotcoldenough(onDualCoilunits).
EcoNetcontrollercouldbemanuallydisabled;
SystemEnabledissettoNOinthecontroller
settings.
4 Noneofthefansarerunning.
3 Oneormorefansarenotrunning.
Fanbladescouldbeobstructed.
Controllerturnsonbutdisplayismissing
linesorblank.
EcoNetControllerdoesnotturnon.
Nopowertocontroller
Controllerboardcouldbedamaged.
Controllerboarddisplayisdamaged.
5
7
Halfspeedfanwire(RED)couldbe
disconnected/loose.
Controllercouldbemanuallydisabled;System
EnabledissettoNOinthecontrollersettings.
Nopowertocontroller.
Controllercouldbeenabled,butEXVisnot
opening.
Verifyifcompressorisrunning.
EXVisoperating,butunitisstillnot
cooling.
6
Unitisnotcooling.
Fansrunbutnevergotohalfspeed.
UnithasPSCfanmotorsinstalled.
AuxRelayscouldbedamaged
Fanmotorscouldbemalfunctioning
Coolerisinthemiddleofadefrostcycle
Problem
SpaceTempsensorisdisconnected.
PossibleCause
Fansrunbutnevergotofullspeed.
Setpointissatisfied
EvapTempisnotlowenough.
Page1of4

# Remedy
Closedoortothebox.Makesuredoorremainsclosedunless/untilaccesstoboxisneeded.
Verifyatcontrollerdisplaythecurrentsuperheatandvalveposition;goto Status →Superheat/EXVCurrentPos. Ifsuperheatis
consistentlyhighandvalveisconsistentlyrunningatorcloseto100%,thesystemcouldbelowonrefrigerant.Verifyifsight
glassatcondensingunitisclear.Verifysuctionpressurewithasetofgauges.Rechargesystemasneeded,verifyifanyleaksare
presentandfixasneeded.
Verifyatcondensingunitifcompressorisshuttingdownintermittently.Troubleshootcondensingunitandverifyifhighhead
pressure,phaseloss,etc.
Verifyunderthecontrollersettingsthatthecorrectrefrigerantisselected.Onthedisplay,goto
Settings →Equipment→Refrigerant .Anincorrectrefrigerantsettingwillcauseincorrectsuperheatcalculationandthesystem
willnotoperateproperly.
VerifyifSuctionTempThermistoralarmisactive:oncontrollerdisplaygoto Service →CurrentAlarms .AlsoverifySuction
TemperaturereadingunderStatus→Sensors→SuconTemp ;ifitisreading"‐60 ⁰F",thesensorisnotmakinggoodcontactoris
missing.IfSuctionTempsensorinputismissing,theEXVwillremainatafixedpositionuntilsensorisreplaced,andalarm
"A100SuctionTempThermistorFailure" willbeactive.Ifsensorisreadingavalueotherthan‐60 ⁰F,verifythatitisnotan
erraticvalueandthatthereadingreasonablycorrespondstotheconditionsattheevaporator(forexample,ifsensorisreading
150⁰Fwhenthesuctionlineattheevaporatorisnearfreezingconditions). ReplaceSuctionTempThermistor(partno.
08219637).
VerifyifSuctionPressurealarmisactive:oncontrollerdisplaygoto Service →CurrentAlarms .AlsoverifySuctionPressure
readingunderStatus→Sensors→SuconPressure ;ifitisreading"‐14.7PSIG",thesensorismalfunctioningorisdisconnected.
Ifthecontrollerdetectsthatthepressureinputismissing,alarm "A106SuctionPressureSensorFailure" willbeactiveandthe
controllerwillattempttocalculateapproximatesuperheatbyusingEvapTemp1readinginsteadofSaturatedSuctionTempand
continuemeteringtheEXV,butthecalculatedsuperheatwillnotbeasaccurate. ReplaceSuctionPressureTransducer(partno.
08219621).
VerifyharnessconnectiontotheEXVandtothecontrollerboardissecure.SetSystemEnabletoNO,under Settings →System
Enable inordertoclosetheEXVandforceapumpdown.ConfirmthattheEXVcanbeheardmovingasitcloses.ConfirmEXV
positionunderStatus→EXV→EXVCurrentPos. is0%.Verifythatcompressorpumpsdownandshutsoffafteracoupleof
minutes;SuctionPressurereadingunderStatus→Sensors→SuconPressure shoulddecreaseasthesystempumpsdown.If
thecompressorisstillrunninganddoesnotturnoff,theEXVmaybemalfunctioningandallowingsomerefrigeranttopass
throughevenafterbeingcommandedbythecontrollertoclose. SeeAddendumAformoreinformationontroubleshootingthe
EXV.ReplaceEXVifnecessary.
Makesuredoortothefreezeriskeptclosedunless/untilaccesstofreezerisneeded.
Verifythatwhencontrollerstartsadefrost,theheatersareenergizedandoperatingproperly.Amanualdefrostcanbestarted
bygoingonthedisplaytoService →DefrostControl→StartaDefrost .VerifyatthecontrollerboardthattheLED'sforthe
defrostrelaysturnONandtheirstatusisONonthedisplay( Status→Outptus→DefrostRelay#1/#2 ).IftheunitisaLow
Profileevaporator,makesurethatCoilTypeissetto"Single" (gotoSettings→Equipment andscrolldowntoverifythese
parameters),andthatEvapTemp1sensorisconnectedandhavingavalidreading.IfEvapTemp1sensorisdisconnected,the
controllerwillalarm( "A101EvaporatorTempSensorFailure" )andtheDefrostRelayswillnotturnON.IfCoilTypeis
mistakenlysettoDual,thecontrollerwillalarm( "A102EvapTemp2ThermistorFailure" )andthemissingEvapTemp2sensor
willpreventDefrostRelay#2fromturningon;thiswouldkeepthebottomheateranddrainpanheaterfromturningonduringa
defrostandwillcauseicebuilduponthebottompartofthecoil.IfbothDefrostRelaysareturningON,verifywithameterthat
theheatersaredrawingampsandarewarmingup;iftheyarenot,verifytheheaterwiringwiththewiringdiagramatthe
evaporator.Iftheheatersarewiredproperlybutstillnotheating,theymayneedtobereplaced.
Iftheheatersareverifiedtobeworkingproperly,proceedtoverifydefrostcycleduration:onthecontrollerdisplay,goto
Status →Defrost→LastDefr.Time .Also,forceadefrostandwaitforittofinishtotakenoteoftheduration.LowProfile
Evaporatorstypicallyneedbetween20to30minutesdefrostdurationtocleartheice.Ifthedefrostcycleistooshort,the
DefrostTerminationTemperature(Def.Term.Temp )andRuntimeUntilDefrost( Def.Cmp.RunTime )canbeadjustedas
neededinSettings→Equipment .Also,thepulsingonDefrostRelay#1(topheater)canbedisabledbysetting DefrostPulse
Override toYESifneeded.Iftheunitalreadyhassomeicebuiltupinthecoil,itmaytakeseveraldefrostcyclestocleartheice
aftertheparametersmentionedaboveareadjusted.
Makesuredoortothefreezeriskeptclosedunless/untilaccesstofreezerisneeded.
Verifythatwhencontrollerstartsadefrost,theheatersareenergizedandoperatingproperly.Amanualdefrostcanbestarted
bygoingonthedisplaytoService →DefrostControl→StartaDefrost .VerifyonthecontrollerboardthattheLED'sforthe
defrostrelaysturnONandtheirstatusisONonthedisplay( Status→Outptus→DefrostRelay#1/#2 ).IftheunitisaCenter
Mountevaporator,makesurethatCoilType issetto"Dual" andDefrostPulseOverride setto"YES" (goto
Settings→Equipment andscrolldowntoverifytheseparameters),andthatEvapTemp1andEvapTemp2sensorsare
connectedandhavingavalidreading.IfEvapTemp1sensorisdisconnected,thecontrollerwillalarm( "A101EvaporatorTemp
SensorFailure" )andDefrostRelay#1willnotturnON;ifEvapTemp2sensorisdisconnected,thecontrollerwilalarm( "A102
EvapTemp2ThermistorFailure" )andDefrostRelay#2willnotturnON.IftheDefrostRelaysareturningON,verifywitha
meterthattheheatersaredrawingampsandarewarmingup;iftheyarenot,verifytheheaterwiringwiththewiringdiagram
attheevaporator.Iftheheatersarewiredproperlybutstillnotheating,theymayneedtobereplaced.
OnCenterMountevaporators(CoilType=Dual ),bothEvapTemp1(whitewires)andEvapTemp2(bluewires)areusedfor
defrosttermination.Duringadefrostcycle,whenEvapTemp1sensorreachesDefrostTerminationTemp,theDefrostRelay#1
willturnoff.SameforEvapTemp2withDefrostRelay#2;eachsidewillterminatedefrostindependently.Verifywiththe
wiringdiagramontheunitthatEvapTemp1sensorislocatedonthecoilwhoseheatersarewiredtoDefrostRelay#1.Same
goesforEvapTemp2,itshouldbelocatedonthecoilwhoseheatersarewiredtoDefrostRelay#2.
OnCenterMountevaporators(CoilType=Dual ),makesurethatDefrostPulseOverrideissettoYESsoDefrostRelay#1does
notpulseduringadefrostcycle(goto Settings →Equipment→Def.PulseOverr. andmakesureitissettoYES).
Iftheheatersareverifiedtobeworkingproperly,proceedtoverifydefrostcycleduration:onthecontrollerdisplay,goto
Status →Defrost→LastDefr.Time .Also,forceadefrostandwaitforittofinishtotakenoteoftheduration.CenterMount
Evaporatorstypicallyneedbetween20to30minutesdefrostdurationtocleartheice.Ifthedefrostcycleistooshort,the
DefrostTerminationTemperature(Def.Term.Temp )andRuntimeUntilDefrost(Def.Cmp.RunTime )canbeadjustedas
neededinSettings→Equipment .Iftheunitalreadyhassomeicebuiltupinthecoil,itmaytakeseveraldefrostcyclestoclear
theiceaftertheparametersmentionedaboveareadjusted.
Compressorcouldbeshuttingdown
intermittently.
Verifythatthecorrectrefrigerantisselected.
Doorisopen.
SuctionTempsensordisconnected(controllerwill
alarm;redLEDoncontrollerwillbeblinking),or
sensorcouldbemalfunctioning/readingerratic
value.
SuctionPressuretransducerdisconnected
(controllerwillalarm;redLEDoncontrollerwillbe
blinking),ortransducercouldbemalfunctioning.
9
10 Suctionlineatcompressorisicingup
excessively.
Systemcouldbeundercharged/leakpresentinthe
system.
12 Evaporatorcoilisicingup(CenterMount
FREEZER,electricdefrost).
UnitiscoolingbutSpaceTempnever
reachessetpoint.
Verifythatheatersareworkingwhencontroller
goesintodefrost.
Verifydurationofdefrostcycle/runtimebetween
defrosts.
Doorisbeingleftopen.
11 Evaporatorcoilisicingup(LowProfile
FREEZER,electricdefrost)
VerifyEXVisfunctioningproperly,closing
completelyforpumpdown.
VerifyEvapTemp1andEvapTemp2sensor
locations.
VerifyDefrostPulseOverrideissettoYES.
Doorisbeingleftopen.
Verifythatheatersareworkingwhencontroller
goesintodefrost.
Verifydurationofdefrostcycle/runtimebetween
defrosts.
Problem PossibleCause
Page2of4

# Remedy
13
Verifylastdefrostcycledurationunder Status →Defrost→LastDefr.Time ,and/orforceadefrostmanuallyandtimeittoverify
duration.LowProfileandCenterMountevaporatorsshouldnotdefrostforlongerthan30‐35minutes.AdjustDefrost
TerminationTemperature(Def.Term.Temp )downasneeded,andalsoadjusttheMaximumDefrostTime( Def.MaxRun
Time )downfromthe60minutedefaultsettingifneeded.
14
TheDrainTempsensormaybeusedonLowProfileFreezersasanadditionalearlywarningthaticeisbuildinguponthedrain
pan.ToenablethisfunctionsetDrainSensor?toYESonSettings →Equipment ,andmakesurethataDrainTempSensor(part
no.08219623)isconnectedtothecontroller(DRAIN)andsecuredtothedrainpan(carefullysecuringthesensorwirefrom
touchingtheheaters).Whenadefrostcycleends,iftheDrainTempdoesnotreachTerminationTemp,thecontrollerwill
generatethe"DrainTemp<DefrostTerminationTemp." alarm.Verifythatthedrainpanheaterisconnectedandworking
properly,and/orthatthesensorisproperlyplacedflatonthedrainpansecuredwiththesamenutthatisholdingtheheater
bracket.Verifythatdrainlineisfreeofobstructionandheattapeisworkingproperlytokeepthelinewarm.
15 IfnoDrainTempsensorisinstalled,makesureDrainTempsensorisconfiguredtoNOunder Settings →Equipment→Drain
Temp? .IfaDrainTempsensorismeanttobeinstalled,makesurethesensorisreconnectedorreplaced(partno.08219623)
16 GotoSettings →Equipment→AuxTemp? andmakesureitisconfiguredtoNO.TheAuxTempsensorinputisnotusedinthe
currentsoftwareversion.
AirDefrostunits(settoCooler)typicallyenddefrostonmaximumtime,sointhisscenariothisnotificationwouldbenomal.Ifa
shorterorlongerdefrostcycleisdesired,theMaxDefrostTimecanbeadjustedunder Settings →Equipment→Def.MaxRun
Time (defaultis60minutes).
ElectricDefrostunits(settoFreezer)typicallyenddefrostwhentheEvapTempreadingreachesDefrostTermination
Temperature.IfanElectricDefrostevaporatorisendingdefrostonmaximumtimeinstead,verifyunder
Settings→Equipment→Def.MaxRunTime issettonolessthan30minutes(orisalreadyatthedefault60minutes).Ifitisstill
terminatingonmaxtime,verifytheEvapTempsensorandelectricheatersbyreferringtoitems10and11inthisguide.
Verifythateachcontrollerthatisintendedtoworkinthegroupisaddressedproperly.Oneachcontrollerdisplay,goto
Settings →Equipment→Group‐MemberCfg. tosettheaddress.Group1LeaderwillbeG1‐L,Group1Follower#2willbeG1‐2,
Group1Follower#3willbeG1‐3,etc.SameforGroups2,3and4.Eachgroupwillsupportamaximumof6evaporators(1
Leader+5Followers).Makesurethattherearenoconflictingaddressessetbetweentwoormorecontrollers.
Verifythatthecommunicationwireusedisatleast 22gauge,shielded.Verifyeachofthe3conductorsareterminatedateach
boardonE1,E2andRTterminalsandthatpolarityismaintainedfromboardterminaltoboardterminal(awirelandedatE1on
thefirstboardhastogotoE1oneveryotherboardonthedaisychain;sameforE2andRT).Verifythattheshieldingstrands
areconnectedateveryspliceandterminatedatagroundpointononeendofthedaisychainonly.
Verifyoneachcontrollerinthegroupthat SystemEnableissettoYES.Goto Settings →SystemEnable andverifythatallthe
controllersinthegrouparesettoYES.
Verifysoftwareversionateachcontrolleronthedisplaybynavigatingto Service →SowareVersion .Everycontrollerinone
Groupmustberunningthesamesoftwareversionforthegroupfunctiontooperateproperly.Ifyouarehavinggroupsync
issuesandhaveoneormoreboardswherethesoftwareversiondoesnotmatchtheothers,pleasecallCustomerSupport.
GotoSettings →DateandTime oneachcontrollerboarddisplaytosetthecontrollertimeclock.IfyouhaveaCommand
CenterDisplaywiredtooneormorecontrollerboards,thetimeclockcanbesetthereanditwillbesimultaneouslybroadcastto
everycontrollerconnected.
Ifthecontrollerboardremainspoweredoffformorethanacoupleofdays,thetimeclockwillhavetobereset.Goto
Settings →DateandTime oneachcontrollerboarddisplaytosetthecontrollertimeclock.IfyouhaveaCommandCenter
Displaywiredtooneormorecontrollerboards,thetimeclockcanbesetthereanditwillbesimultaneouslybroadcasttoevery
controllerconnected.
IfinstallingCommandCenterwithin150feetofthenearestEcoNetcontroller,makesurethatthewiresfromtheRandC
terminalsattheCommandCentermountingbracketaresecurelyconnectedtothe0Vand16Vterminalsatthecontroller.
Makesurethecontrollerispoweredon.IfCommandCenterisinstalledmorethan150feetawayfromnearestcontroller,make
sureitisconnectedtoaseparate24VACor24VDCpowersupply.PleaserefertotheCommandCenterwiringdiagramonPage
13oftheEcoNetInstallationManual.
InspecttheCommandCenterDisplayforsignsofdamage(crackedscreen,burnmarksonthecircuitboard/mountingbracket,
brokencomponents).Ifdamaged,replacetheCommandCenterDisplay.MakesurethattheCommandCenterisinstalled
indoors,outsideofthewalk‐incooler/freezer,andthatitdoesnotgetwetordropped.
Timeclockoncontrollermaynothavebeenset.
Timeclockoncontrollermayhavebeensetat
install,butaprolongedpowerlossmayhavereset
it.
TimestampontheAlarmHistoryisnot
accurate.
EcoNetcontrollermaynotbeaddressedproperly
toworkaspartofthegroup.
EcoNetcontrollermaynotbewiredproperlyto
therestofthegroup.
Oneormorecontrollersinthegroupmaybe
manuallydisabled.
Onecontrollermayhaveadifferentsoftware
versionfromtheothercontrollersinthegroup.
Ihavemultipleevaporatorsinthesame
boxworkingasagroup,butoneormore
ofthemarenotcooling/operatinginsync.
MakesurethatCommandCenterDisplayis
connectedtoapowersupply.
CommandCenterDisplaycouldbedamaged.
CommandCenterDisplayscreenisblank.
EcoNetControllergeneratesalarm"A002
DrainTemp<DefrostTermination
Temp." (LowProfileFREEZERonly).
Theremaybeiceonthedrainpanafteradefrost
cycleended;drainlinecouldbeblocked.
EvaporatorCoilissteamingexcessively
duringadefrost;waterdroplets
accumulatingontheceiling(LowProfile
andCenterMountFREEZERunits).
Defrostcycleisrunningtoolong.
EcoNetControllergeneratesnotification
"T001DefrostFailure:MaxTimeExpired"
Problem PossibleCause
17
EvaporatorworksonAirDefrost
EvaporatorworksonElectricDefrost
EcoNetControllergeneratesalarm"A104
DrainTempThermistorFailure "
DrainTempSensorconfiguredtoYESunder
Settingsandsensorisnotconnected.
EcoNetControllergeneratesalarm"A105
AuxTempThermistorFailure "
AuxTempSensorisconfiguredtoYESunder
Settingsandsensorisnotconnected.
18
19
20
Page3of4

# Remedy
21
MakesurethatcommunicationwiresfromE1andE2terminalsattheCommandCentermountingbracketaresecurely
connectedattheE1andE2terminalsrespectivelyonthefirstcontrollerboardinthedaisychain.Makesureallcontrollerson
thedaisychainnetworkarepoweredonandproperlyaddressedsotheCommandCentercanfindthem.ForGroupLeadersand
Followers,theaddressissetateachcontrollerunderSettings →Equipment→Group‐MemberCfg. Forstandaloneunitsonthe
daisychain,theaddressissetateachcontrollerunder Settings→Equipment→NetworkInstance .Makesurethatatleast22
gauge,shieldedwireisused.PleaserefertotheEcoNetInstallationManualforhowtodaisychainmultiplecontrollers
togetherwithaCommandCenterDisplay.
Makesurethateveryevaporatorcontrollerinthedaisychainnetworkispoweredon.
MakesureallcontrollersonthedaisychainnetworkarepoweredonandproperlyaddressedsotheCommandCentercanfind
them.EveryEcoNetboardonthedaisychainmusthaveauniqueaddressset.ForGroupLeadersandFollowers,theaddressis
setateachcontrollerunderSettings →Equipment→Group‐MemberCfg. Forstandaloneunitsonthedaisychain,theaddressis
setateachcontrollerunderSettings→Equipment→NetworkInstance .
MakesurethatcommunicationwiresfromE1andE2terminalsattheCommandCentermountingbracketaresecurely
connectedattheE1andE2terminalsrespectivelyonthefirstcontrollerboardinthedaisychain.Makesurethatthe
communicationwireissecurelyconnectedtotheE1,E2andRTterminalsbetweeneverycontrollerboard,andthatthewires
arenotcrossedfromterminaltoterminal. Makesurethatatleast22gauge,shieldedwireisused.Makesurethatthe
shieldingstrandsaretiedtogetherateveryspliceandtiedtoagroundpointatoneendofthedaisychainonly.Makesureall
controllersonthedaisychainnetworkarepoweredonandproperlyaddressedsotheCommandCentercanfindthem.Please
refertowiringdiagramtheEcoNetInstallationManualforhowtodaisychainmultiplecontrollerstogetherwithaCommand
CenterDisplay.
Makesurethatcommunicationwiresbetween
CommandCenterDisplayandEcoNetcontroller
areproperlyconnected.
CommandCenterDisplayturnsonandis
abletocommunicatewithsome
controllers,butnotwithothersonthe
daisychainnetwork.
CommandCenterDisplayturnsonbutis
notcommunicatingwithanycontrollers.
Makesurethatcommunicationwiresbetween
CommandCenterDisplayandEcoNetcontroller
areproperlyconnected.
Possibleconflictofaddressesonthenetwork.
SomeEvaporatorControllersinthenetworkbus
maynotbepoweredon.
22
Problem PossibleCause
Page4of4

6/23/2021
AddendumA
VerifyingEcoNetControllerEXVOperation(SporlanSERValve)
1. Onthecontrollerdisplay,navigatetoSettings→Equipment→EXVStepperTypeandverifythatit
issetto2500steps,correspondingtoSporlanSERvalves.
2. Connectasetofgaugesonthesuctionlinetoverifysuctionpressure.
3. Ifthesystemisrunning(nodefrostactive),gotoSettings→SystemEnableandsetittoNo.This
willcausethecontrollertocommandtheEXVtocloseandpumpdownthesystem.Ifstanding
closeenoughtotheevaporator,listenforthecharacteristicnoiseoftheEXVasitisclosing.The
noise/vibration from the valve is confirmation that the controller is applying current to the
steppermotorinthevalve.Ifthevalveisconfirmedtomakenoise,gotoStep5.Ifdrivingthe
valveagainisneededtoconfirmvalvenoise,setSystemEnablebacktoYesandwaitthetwo‐
minuteminimumOFFtimetofinishsothecontrollercancommandthevalvetoopen(openthe
freezerdoorifneededtowarmtheboxslightly).Afterconfirmingthecontrollerisattemptingto
openthevalve,setSystemEnablebacktoNotoforcethevalvetocloseagain.(Alternatively,
disconnectingandre‐connectingpowertothecontrollerwillcauseittodrivethevalveclosedas
partofinitialstartupofthecontroller.)
4. Ifthevalvedoesnotmakeanynoise:
a. Verifyconnectiontothevalveissecure,andthatthe4pinsonthevalvearenotbent.
b. Verifythatthewiringharnessisnotdamaged,orthatanypinshavenotcomeloosefrom
theconnectoronthecontrolboard.
c. RefertoVerifyingControllerSignaltoEXVsectionbelowtodetermineifthecontroller
outputtothevalveisbeingenergized.
5. Onthecontrollerdisplay,navigatetoStatus→EXVtoverifytheEXVCurrentPos.Thisisthevalve
positioncurrentlybeingcommandedbythecontroller.AftersettingSystemEnabletoNo,the
EXVCurrentPos.willdisplay0%(thecontrolleriscommandingtheEXVtobeat0%).
6. Verifyonthepressuregaugesthatthesuctionpressuredecreases,andthecompressorturnsoff
afterpumpdown.VerifythatwhiletheEXVCurrentPos.is0%,thesuctionpressureonthegauges
doesnotincreasesteadily.Aslightmomentarybumpofthecompressor to pump down any
remainingrefrigerantthatisstillboilingoffandslightlyincreasingpressureonthesuctionlineis
normal,followedimmediatelybythecompressorturningbackoff.
7. Ifsuctionpressurekeepssignificantlyincreasingandcausingthecompressortokeepconstantly
runningwhileEXVCurrentPos.isat0%,itispossiblethevalveisleakingornotworkingproperly.
Proceed to verify the EXV (See attached document from Sporlan: Installation&Servicing
InstructionsforSporlanSERValves).

6/23/2021
VerifyingControllerSignaltoEXV
1. Ifthesystemisrunning(nodefrostactive),gotoSettings→SystemEnableandsetittoNoto
forceapumpdown.Disconnectpowertothecondensingunit,andtheevaporator.
2. With no power applied to the evaporator terminal block,safely disconnect the wireharness
connectorfromthecontrollertoexposethe4pinsthatconnecttotheEXVcable,asshowninthe
picturebelow.
3. Reconnectpowertotheevaporatoronlytoturnthecontrollerbackon.
4. Usingavoltmeter,placethetestleadsbetweenpins1&3,andpins2&4asshowninthepictures
below.SetthemetertomeasureDCvolts.
5. Onthecontrollerdisplay,setSystemEnablebacktoYesandwait1to2minutesforthecontroller
toenablecooling(openfreezerdoorifneededtowarmuptheboxslightlysothecontrollercan
attempttosignalthevalveopen).
6. Withthemetertestleadstouchingpins1and3,whenthecontrollersignalsthattheoutputto
thevalvereachedthedesiredposition(between35%and65%,visibleviaStatus→EXV),themeter
shouldreadapproximately12to16VoltsDCforafewseconds,thenreadapprox.zerovolts.Set
SystemEnablebacktoNotohavethecontrollersendthesignaltoclose.Again,withthemeter
testleadstouchingpins1and3,watchthevoltmeterforthemomentarybumpinDCvolts(12to
16VDC)whenthesignaltothevalvereachesitsfinalposition(0%,visibleviaStatus→EXV)then
backtonearzerovolts.
7. RepeatStep5againwithmeterleadstouchingpins2and4.Repeatthetestseveraltimeswith
both pairs of pins if needed to confirm if the controller is functioning properly or not.  If the
momentary DC voltage jump is detected with the meter following the preceding steps, the
controllerisworkingproperly.ProceedtotroubleshootthewireharnessandtheEXV.
8. Ifnovoltageisdetectedatanypointintimeafterfollowingsteps3thru6,replacethecontroller
board.

0123
45678
9
ÿÿÿÿÿ

ÿÿÿÿ

ÿÿÿ

ÿÿÿÿÿ

ÿÿÿ ÿ

!ÿ"ÿÿ"ÿ

ÿÿÿÿ#

$ÿÿÿ9ÿ

ÿ ÿÿÿ

ÿÿÿÿ

ÿ!"ÿ#

%$ÿÿ%$ÿ&ÿ&ÿ

$ÿ'%(ÿÿ

ÿÿ)!"ÿ#
$ÿÿÿÿ

!$
9
ÿÿÿ!ÿÿÿ

ÿÿÿÿ*+#ÿ,-"ÿ

&#"ÿ%#"ÿ#

ÿÿÿ$ÿ
.
ÿÿÿÿÿ

ÿÿ%$ÿÿ!ÿ ÿÿ

ÿ&ÿÿÿÿ

!ÿ'&ÿÿ ÿ

ÿÿÿÿÿ

!ÿÿ"ÿ&ÿ

ÿÿÿÿÿÿ

ÿ/(&ÿÿ

ÿÿÿÿÿÿ

!ÿÿÿ!#

ÿÿÿÿÿÿ

ÿ'!ÿ &ÿÿ
%
(&ÿ"ÿ&ÿÿ

ÿÿ%"ÿÿÿ
%
$ÿÿÿÿÿÿÿ
ÿÿÿ!ÿÿÿ
ÿÿÿ0ÿÿ
(ÿÿ12ÿ!ÿ
$ÿ%ÿÿÿÿ ÿ
ÿ&ÿÿÿÿ
ÿÿÿÿÿÿÿ

9ÿÿ&ÿÿ$ÿ
&ÿÿÿÿ#
$ÿÿÿ9ÿ
ÿ!ÿ!$ÿÿ
$ÿ)!ÿ&ÿÿ
ÿÿ*+ÿÿ,-ÿÿ+33ÿ
44ÿ ÿÿÿÿÿ
$ÿ5!ÿÿ
ÿÿ$ÿÿ
ÿ%ÿ ÿ!ÿ&ÿÿ
ÿ6!ÿ ÿ!%$ÿ
 ÿÿ ÿÿ!ÿ
%ÿÿÿÿÿ
,"ÿ4(ÿ7 "ÿ
08ÿ4!ÿ.ÿ9ÿ
5ÿ-ÿÿ ÿ
ÿÿ!ÿÿ:#
ÿ)!ÿÿ&ÿ ÿ
#ÿÿÿÿÿ
ÿÿ9ÿÿÿ
!ÿÿÿÿÿ#
$ÿ!ÿÿÿ%ÿ
ÿ1:2ÿÿÿ9ÿ
ÿÿ(ÿ(ÿ ÿ
ÿ;ÿÿ ÿÿ
ÿ,!ÿÿ#
:ÿ"ÿÿÿ(ÿ
!ÿ$ÿ%ÿ"ÿ&ÿ
&ÿÿÿ ÿ ÿÿ
;ÿÿÿ!
0ÿÿÿÿÿ
ÿ!)!$ÿ:
ÿ
%$ÿÿÿÿ%#
ÿ ÿÿ
ÿ
 ÿ ÿ &ÿ9ÿ
ÿ
)!ÿÿÿÿÿ
ÿ
%
<8=54>>45678
9ÿÿÿÿ
ÿ
ÿ$ÿ
ÿ
ÿ.ÿÿ5
"ÿ
ÿÿÿ% ÿ
ÿ
%!ÿÿ#
ÿ?!ÿÿÿ&!ÿ
ÿ
ÿ9ÿÿ
5ÿ9ÿÿÿ%# 
&ÿ
%ÿ@ÿ!ÿ
%ÿÿÿÿ%
ÿ
%$ÿÿÿ&ÿ
ÿÿ&
ÿ
ÿ!ÿ%ÿ
ÿ
 ÿ $ÿ ÿ9ÿÿ$
ÿ
%ÿÿÿÿ #
ÿÿÿ$ÿ%ÿ
!ÿÿ$ÿÿ
'ÿ %$"ÿÿ%ÿ
ÿ
%ÿÿ ÿÿ
ÿ
ÿ#ÿÿ$ÿ 
!ÿ
 !ÿÿ9%ÿ*
ÿ
ÿ%ÿ)!ÿ-%ÿ!
#
ÿ!ÿÿ$ÿ
ÿ
ÿÿÿ!ÿ ÿ
ÿ$ÿÿ
!ÿÿ ÿÿ
ÿ
ÿ%ÿ'ÿÿ
ÿ
"ÿÿ%ÿ$ÿ%
ÿ
ÿÿÿ!ÿÿ
)#
!ÿÿ&ÿ$ÿ&ÿ

9ÿÿÿÿ#
ÿÿ$ÿÿÿ
%:ÿ$ÿ$ÿ%ÿ!ÿÿ
ÿÿÿ9ÿÿ
ÿ!ÿ%ÿÿ
A
BCDEÿG
HIJKL
MNOLJ PIQJLÿ SNTUVL
MIWXYVYÿ
PIQJLÿ
ZL[\]^
MN]NTÿ_^I`Lÿ
aL`X`]I[bL
cdeÿghijk
lVYQLTÿ
Nmÿn]Lo`
MIWXYVYÿp[]LT[IJÿ
SLYoLTI]VTL
qVTX[\ÿp[`]IJJ
rstuv
rstuw
rstux
yzuy{
ÿ|}~u~ {z e yzzÿ

yz hzzhzij
521ÿ7573ÿ148=678ÿ4>2=
AEÿÿÿÿ
BDDB¡ÿB¢ÿE£¤¥¦ÿ£§¥¡
Courtesy of Sporlan Division – Parker Hannifin Corporation

0102
ÿ4567ÿ89ÿ76865ÿ96ÿ
0ÿ
0ÿÿ5ÿÿ
ÿ65
5ÿ86ÿ7080ÿÿ
508
ÿ6ÿ89ÿ0ÿ8540ÿ
8ÿÿ
ÿ5677ÿ86ÿ
576
!ÿ0ÿ5ÿ800
86
ÿ4ÿ89ÿ0ÿÿ576!ÿ
80"
ÿ#5086ÿ86ÿ5ÿ
108
5ÿ6ÿ ÿ461ÿ61ÿ
86ÿ
76865ÿ6808ÿ#ÿ
$0
ÿ78ÿÿ5898ÿ86ÿ
89ÿ
#4086ÿ961ÿÿ
0
ÿÿ$05ÿ78ÿÿ80"ÿ
86ÿ0
5ÿ8908ÿ89ÿ0ÿÿ68ÿ
07
0ÿ895ÿ582ÿ4567ÿ
89ÿ4
07ÿ65ÿ582ÿ4567ÿ
68
08ÿ189ÿ968ÿ##ÿ 9ÿ
!0!
ÿÿ9##ÿÿ89ÿ6#ÿ
#6
86ÿ86ÿ#5!8ÿ908ÿÿ
6
8ÿ86ÿ89ÿ76865ÿ8ÿ
8ÿÿ
8562ÿ8ÿ8908ÿ
89ÿ!
0!ÿ62ÿÿ150##ÿ
189
ÿ0ÿ18ÿ689ÿ5ÿ89ÿ
6
5ÿ6#5086ÿ%0!ÿ
85
0ÿ&'()ÿ+,)ÿ-./-012
-+3-
ÿ&4.1&'&ÿ)-&/-042
)'0-
5ÿ0ÿ961ÿÿ 0ÿÿ
5
ÿ80ÿ8ÿ8505ÿ
05ÿ
##ÿ6#8602ÿ0ÿ
4ÿÿ96ÿÿ658ÿÿ
89ÿ#56#5ÿ586ÿ0ÿ961ÿ
6ÿ89ÿ8505ÿ#0"0ÿ 9ÿ
!0!ÿ96ÿÿ67#82ÿ
80ÿ465ÿ68ÿ
86ÿ89ÿ68565ÿ0ÿ0##2ÿ
#615ÿ 9ÿ15ÿÿ665
6ÿ0ÿ89ÿ68565ÿ
7040855ÿ96ÿÿ
68ÿ465ÿ89ÿ#56#5ÿ
0880978ÿ86ÿ89ÿ68565
6789:ÿ<8=>7?7@Aÿ
B@CD=E?D7F@C
ÿÿ4ÿ89ÿ!0!ÿ40ÿ86ÿ
6#508ÿ#56#52ÿ680ÿ
0ÿ80ÿ78785ÿ0ÿ
705ÿ76865ÿ580ÿ
G80ÿ81ÿ89ÿ
0"ÿ0ÿ198ÿ0ÿ65ÿ
81ÿ89ÿ5ÿ0ÿ5ÿ
0ÿ96ÿÿ0ÿ961ÿ
ÿ 0ÿÿ68HÿG80ÿ
!0ÿÿ89ÿ80ÿ05ÿ08ÿ
IJÿKÿ89ÿ07ÿ80ÿ
78785ÿ705ÿ
580ÿ056ÿ0"ÿ0ÿ
5ÿ0ÿ65ÿ02ÿ0ÿ0ÿ
!0!ÿ96Lÿ580ÿ
96ÿÿ5085ÿ890ÿÿ
M697ÿ4ÿ89ÿ580ÿÿ
ÿ89ÿ!0!ÿ96ÿÿ
5#0
Iÿÿ4ÿ26ÿ90!ÿ0ÿ86ÿ0ÿ
MNÿ88ÿ8578ÿ
6#5086ÿ64ÿ89ÿ!0!ÿ702ÿ
ÿ#56!ÿ$68ÿ89ÿ
76865ÿ0ÿ86ÿ89ÿ#56#5ÿ
6656ÿ6865ÿ6ÿ
89ÿMNÿ8ÿ89ÿ508ÿ86ÿ
IOOÿÿ0ÿ86ÿÿ89ÿ
PQRÿ586ÿN485ÿ
0##56S7082ÿTÿ6ÿ
89ÿ5!5ÿ96ÿÿ42ÿ
58508ÿ0ÿ0ÿ98ÿ
"ÿ65ÿP50898Rÿ
6ÿ702ÿÿ905ÿ89ÿ
ÿ6570ÿ86ÿ89ÿ!0!ÿ0ÿ
#56!ÿ6#5086ÿ64ÿ89ÿ
76865ÿ4ÿ89ÿMNÿÿ86ÿ
ÿ89ÿP$U QRÿ#686ÿ
0485ÿ0##56S7082ÿ
Tÿ6ÿ89ÿ5!5ÿ
96ÿÿ42ÿS8ÿ
0ÿ0ÿ98ÿ"ÿ65ÿ
P50898Rÿ702ÿÿ905
Vÿÿ4ÿ89ÿ76865ÿ5#6ÿ86ÿ
8#ÿIÿ06!ÿ89ÿ!0!ÿ
84ÿ96ÿÿ9"ÿ
465ÿ68586ÿ$9"ÿ465ÿ
680708ÿÿ89ÿ#658ÿ65ÿ
8505ÿ4ÿ
Wÿÿ4ÿ89ÿ#658ÿ0ÿ8505ÿ
05ÿ05ÿ0ÿ89ÿ76865ÿ
6#508ÿ0ÿÿ8#ÿIÿ
06!ÿ89ÿ!0!ÿÿ6
5ÿ6#50860ÿ0ÿ
89ÿ#567ÿÿÿ89ÿ
68565ÿ65ÿ#615ÿ##2ÿ
9ÿ7040855ÿ64ÿ
89ÿ67#68ÿ96ÿ
ÿ6808ÿ465ÿ45895ÿ
080
XY9>8ÿZ8[9Y?8\8@
D
9ÿ85ÿ!0!ÿ702ÿÿ
5#0ÿ4ÿ5ÿ 9ÿ6ÿ
!0!ÿ702ÿÿ50]ÿ65ÿ
8ÿ68ÿ64ÿ89ÿ##ÿ4ÿ8ÿ
68ÿÿ0ÿ8ÿ65ÿ##ÿ
885ÿ0ÿ68ÿ0ÿ01ÿ^9ÿ
80ÿ89ÿ1ÿ!0!ÿ02ÿ
6!8ÿ50]ÿ062ÿ0ÿ
7896ÿ702ÿÿÿ 9ÿ
62ÿ0ÿ76865ÿ072ÿ
96ÿÿ150##ÿ189ÿ0ÿ18ÿ
689ÿ86ÿ#5!8ÿ070
$0ÿ0ÿÿ576!ÿ19ÿ
50]ÿ4ÿ68ÿS850ÿ05ÿ
96ÿÿ80"ÿ86ÿ#5!8ÿ
070ÿ86ÿ89ÿ76865ÿ0ÿ
895ÿ582ÿ4567ÿ89ÿ8659ÿ
65ÿ582ÿ4567ÿ6808ÿ
189ÿ0ÿ968ÿ540ÿG45ÿ86ÿ
80086ÿ86
_`abcdÿfÿgdhgig
jÿhgigÿklmnomÿplqqrsqÿtumvumlwruq
xyz{|}~ÿz~ÿ}{{ÿ}~~~ÿz{yz{}z~ÿ
ÿ}~ÿ{ÿ}~z~ÿÿÿx
yz~ÿÿÿÿÿ}ÿÿÿ
yz{|}~z
¡
¢
£
£
¤
¥¦§¨©ªÿ¬
ÿ¯°oÿvmuvomÿwum±²ÿwrv³ÿ
vurqwÿl´lµÿ¶mu·ÿ¸l¹¸oº
»ÿ½mlvÿ¸l¹¸oÿ¾u¿µÿ´rw²ÿ
´owÿmlÀº
ÁÿkÂmÀoÿ´rw²ÿrqomwÿÀl°³ÿ
¶¹u´ÿ²uwÿÀl°ÿl´lµÿ¶mu·ÿ
¸l¹¸oº