User Guide

Status Indicators
Statusindicatorsappearinthedisplaytoletyouknowifyoursystemis
heating,coolingoroff.
HEAT ON Indicatesthatyourheatingsystem
  isrunning.
COOL ON Indicatesthatyourcoolingsystem
  isrunning.
SERVICE Indicatesthatauserselectable
  servicereminderwasselected
  (see“ServiceFilterMonitor,page8).
Additional status indicators (Model 2220 Only):
AUX Indicatesthattheauxiliarystageofheatingisrunning 
  (multi-stagesystemsonly).
EMER Indicatesthattheemergencyheatingsystemisrunning(heat
  pumpsystemsonly).
Program Event Indicators
ProgramEventIndicatorsappearinthedisplaytoletyouknowwhatpart
ofyourcurrentprogramisactive.The4differentprogrameventindicators
areMORN,DAY,EVEandNIGHT.
Whentheprogrameventindicatorisashing,yourprogramhasbeen
temporarilybypassedandwillresumeatthenextscheduledevent.
Note: You will not see a program event indicator while in HOLD Mode.
Resetting the Thermostat
Thisthermostatprovidesyouwitharesetbuttonthatwilleraseallofyour
usersettingsandprogramming.
Toresetthethermostat,useasmallobjectsuchasatoothpickorpaper-
clipandgentlypressthebuttonlocatedinsidethesmallholeonthefrontof
thethermostathousinglabeled“reset”.
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Additional Operation Features
Compressor Protection
Thisthermostatincludesanautomaticcompressorprotectiondelayto
avoidpotentialdamagetoyoursystemfromshortcycling.Thisfeature
activatesashortdelayafterturningoffthesystemcompressor.
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