Specifications

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BACnetT‐StatUser’sManualRev1.1,7/28/11 Page|13
7.0CareandCleaning
TheBACnetT‐Statshouldprovideyearsofuninterruptedservice.Minimalpreventivemaintenanceis
required.However;itisimportanttomakesurethattheT‐
Statiskeptfreeofdust.AdustyT‐Statwillnotallowairto
circulateproperlyaroundthebuilt‐intemperatur e sensor
effectingproperoperation
oftheunit.
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8.0Troubleshooting
LCDScreenisdarkandnocharactersare
displayed
Removecoverandverifypresenceofpoweronthe“R”
terminal,checkconnectionofthecommononthe“C”
terminal.Checkforpresenceof24VACbetweenRandC.
T‐StatmodesayCool1,butcompressor
doesnotengage
VerifyconnectiontoHVACunit.Ensureshort‐cycletimeris
notinhibitingunit.
Clocklosestimeafterpowerfailure ReplacetheCR1025Lithiumbattery
Buttonsdonotrespond Pressbuttonsslowly,somefunctionsmaytakepressingthe
buttontwice.
Displayiscorrupted First,cyclepowertotheunit.Ifthisdoesnotcorrectthe
problem,resetsystembyremovingtheT‐Statbodyfromthe
mountingplate.Thenreturnthebodytothemountingplate
whiledepressingtheuparrow,centerbutton anddown
arrowallatthesametime.
Thedisplaywillrespondwith
“ColdSense”,thesebuttonsmustbehel dforaminimum5
second.Thiswillbegina
systemrestartandthe
displaywillrespondwith
“ColdStart”.Releasethebuttonsatthistime.Thisaction
willresettheT‐Statandreturnallsettingstotheir
factory
defaults.Allcustomscheduleswillbeerased.
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