
6
TROUBLESHOOTING
Reset Operation
Ifavoltagespikeorstaticdischargeblanksoutthedisplayorcauseserraticthermostatoperationyoucanresetthethermostat
by pressing , andTIMEatthesametime.Ifthethermostathaspower,hasbeenresetandstilldoesnotfunctioncorrectly
contactyourheating/coolingservicepersonorplaceofpurchase.
Symptom Possible Cause Corrective Action
No Heat/No Cool/No Fan
(common problems)
1. Blownfuseortrippedcircuitbreaker.
2. FurnacepowerswitchtoOFF.
3. Furnaceblowercompartmentdoororpanel
loose or not properly installed.
Replacefuseorresetbreaker.
TurnswitchtoON.
Replacedoorpanelinproperpositiontoengagesafetyinterlockor
door switch.
No Heat 1. SystemSwitchnotsettoHeat.
2. Looseconnectiontothermostatorsystem.
3. HeatingSystemrequiresserviceor
thermostat requires replacement.
SetSystemSwitchtoHeatandraisesetpointaboveroom
temperature.
Verifythermostatandsystemwiresaresecurelyattached.
Diagnostic:SetSystemSwitchtoHeatandraisethesetpoint
above room temperature. Within five minutes the thermostat
shouldmakeasoftclicksound.Thissoundusuallyindicatesthe
thermostatisoperatingproperly.Ifthethermostatdoesnotclick,
trytheresetoperationlistedabove.Ifthethermostatdoesnotclick
after being reset contact your heating and cooling service person
orplaceofpurchaseforareplacement.Ifthethermostatclicks,
contact the furnace manufacturer or a service person to verify the
heating system is operating properly.
No Cool 1. SystemSwitchnotsettoCool.
2. Looseconnectiontothermostatorsystem.
3. CoolingSystemrequiresserviceor
thermostat requires replacement.
SetSystemSwitchtoCoolandlowersetpointbelowroom
temperature.
Verifythermostatandsystemwiresaresecurelyattached.
SameprocedureasdiagnosticforNoHeatconditionexceptset
thethermostattoCoolandlowerthesetpointbelowtheroom
temperature. There may be up to a five minute delay before the
thermostatclicksinCoolingifthecompressorlock-outoptionis
selectedinthecongurationmenu(Item6).
Heat, Cool or Fan
Runs Constantly
1. Possibleshortinwiring.
2. Possibleshortinthermostat.
3. PossibleshortinHeat/Cool/Fansystem.
4. FanSwitchsettoFanOn.
Checkeachwireconnectiontoverifytheyarenotshortedor
touchingtogether.Nobarewireshouldstickoutfromunder
terminal screws. Try resetting the thermostat as described above. If
the condition persists, the manufacturer of your system or service
personcaninstructyouonhowtotesttheHeat/Coolsystemfor
correct operation. If the system operates correctly, replace the
thermostat.
Furnace Cycles Too Fast
or Too Slow
(narrow or wide
temperature swing)
1. Thelocationofthethermostatand/or
thesizeoftheHeatingSystemmaybe
influencing the cycle rate.
Item2intheCongurationMenuistheadjustmentthatcontrols
the cycle rate. If an acceptable cycle rate is not achieved using the
FA(Fast)orSL(Slow)adjustmentcontactalocalserviceperson
for additional suggestions.
Cooling Cycles Too
Fast or Too Slow
(narrow or wide
temperature swing)
1. Thelocationofthethermostatand/or
thesizeoftheCoolingSystemmaybe
influencing the cycle rate.
Thecyclerateforcoolingisxedandcannotbeadjusted.Contact
a local service person for suggestions.
Thermostat Setting and
Thermometer Disagree
1. Thermostat thermometer setting requires
adjustment.
Thethermometercanbeadjusted+/-4degreesaslistedinitem7
oftheCongurationMenu.Nootheradjustmentispossible.
Blank Display and/or
Keypad Not Responding
1. Lossofpower.
2. VoltageSpikeorStaticDischarge.
Checkheat/coolsystemforpower.
IfavoltagespikeorstaticdischargeoccursusetheReset
Operationlistedabove.
OPERATING FEATURES
Nowthatyouarefamiliarwiththethermostatbuttonsanddisplay,
read the following information to learn about the many features
of the thermostat.
• SIMULTANEOUS HEATING/COOLING SETPOINT STOR-
AGE — You can enter both your heating and cooling set-
points at the same time. There is no need to change the
thermostat at the beginning of each season.
• CONFIGURATION MENU — Allows you to customize
certain thermostat options.
OPERATION
SETTING THE THERMOSTAT
This thermostat is very easy to operate. Set the SYSTEM
switchtoeitherHEATorCOOLthenpress and until
the temperature you want to maintain is shown on the right side
of the display. If you want to turn the system off, just move the
SYSTEMswitchtoOFF.
The FAN switch controls the fan operation. When the FAN
switchissettoAUTO,thefanwillcyclewiththefurnaceorair
conditioner.WhentheFANswitchissettoON,thefanwillrun
continuously,regardlessofSYSTEMswitchposition.