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Homeowner Service Alert alue3000Filter 13002Humidifier Pad 3004NumberMaintenance4000User Wi-Fi state change,disable4002Image file downloadfailed3001Filter 23003UV LightPureAirMaintenance4001Firmware download failed3005Comfort Sync Alert Codes and TroubleshootingCritical alerts are displayed on the Home screen, in the Homeowner alert button, and in the Installer alert button. Minor and moderate alerts are found only in theInstaller alert omponentThermostat, airhandler, furnace,outdoor unit,equipmentinterface anddamper controlmodules.Actual Displayed Alert TextThe thermostat has found anunknown device on the system.Component or System OperationalState and Troubleshooting Tips 1The room thermostat when not inconfiguration mode has detected anunknown device.How to Clear AlertCodeClear alert code byreconfiguring thesystem.Typically the thermostat will send acommand to the unknown deviceand place it in a soft disable state.The Comfort Sync control with thesoft disable state will indicate so asfollows: On air handler, furnace andoutdoor controls, the stateis display by doublehorizontallinesonseven-segment display. On the damper controlmodule, the green LED willblink 3 seconds on and 1second off. On the equipment interfaceComfort Sync 7-Day Programmable Communicating Thermostat

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting TipsHow to Clear AlertCodemodule, the green LED willblink 3 seconds on and 1second off. 11CriticalThermostatThe thermostat cannot find apreviously installed systemcomponent. 12CriticalThermostat,furnace,equipmentinterface moduleor air handlerThe thermostat cannot find aComfort Sync indoor unit. 14CriticalThermostatThe thermostat found more thanone thermostat, indoor oroutdoor unit on the system.18MinorThermostatThe outside temperature isbelow the level where the heatpump is programmed to heat thehome.2 Cycling power to the soft disablecontroller may clear the condition. Ifcycling power does not clear thesoft disable state then replacecontrol.Check all connections and cyclesystem power.If problem persists,clear by reconfiguringthe systemPress the setup tab, press start, andpress confirm.If problem persists, then check allsystem components (devices)connections to make sure they areComfort Sync -compatible.Thermostat did not find an indoorunit. Make sure there is a ComfortSync indoor unit on the system.Check R, i , i- and C connections.Automatically clearswhen the systemdetects that the issueno longer exists.Ohm wires and cycle power.Replace indoor unit control if thereis no response.Check wiring and remove duplicateequipment.Reconfigure system.The system will not use the heatpump to warm your home.Outdoor temperature is below thelow balance point.Automatically clearswhen the systemdetects that the issueno longer exists.This is a notificationonly alert code.

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting Tips 19MinorThermostatThe outside temperature ishigher than the level where thefurnace or electric heat isprogrammed to work. 29CriticalThermostatThe thermostat is reading anindoor temperature that is higherthan 99ºF. The thermostat willnot allow any heating operationto begin until it senses an indoortemperature lower than 99ºF. 30ModerateThermostatThe thermostat is reading anindoor temperature that is lowerthan 40ºF. 3How to Clear AlertCodeHeat pump will not be used toservice a heating demand.The system will only use the heatpump to warm your homeThis is a notification only alert code.Automatically clearswhen the systemdetects that the issueno longer exists.Outdoor temperature is above thelow balance point.Indoor unit (furnace or air handler)will not be used to service a heatingdemand.Indoor temperature rose above99ºF during a heating or coolingdemand.Automatically clearswhen the systemdetects that the issueno longer exists.Heating operation is not allowed.Check to ensure that heatingequipment is not stuck ON(reversing valve, etc.).Check the accuracy of thethermostat temperature sensor.Select cooling system mode to coolthe indoor space.The thermostat will not allow anycooling operation to begin until itsenses a temperature higher than40ºF.Automatically clearswhen the systemdetects that the issueno longer exists.Indoor temperature fell below 40ºF.Cooling operation is not allowed.Check to ensure that coolingComfort Sync 7-Day Programmable Communicating Thermostat

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting TipsHow to Clear AlertCodeequipment is not stuck ON. 3132CriticalModerateThermostatThermostat,furnace, airhandler oroutdoor unitThe thermostat has lostcommunication with a systemcomponent for more than threeminutes.The applicable systemcomponent (device) is resettingitself. 4Check accuracy of the thermostattemperature sensor.Select heating system mode to heatthe indoor space to above 40ºF.The applicable system component(indoor, equipment interface ordamper control module or outdoorunit) has not communicated withthermostat for more than threeminutes. If fault persists, thencycle power.Fault clears aftercommunication isrestored.Check connections.Ohm wires.This issue may occur during apower outage or power fluctuationin the system.If persistent or if it coincides with thesystem operations then proceedwith the following troubleshootingsteps. Checkthepowerconnections Check the amp draw at thetransformer(thetransformermaybeoverloaded) Check 24VAC voltage atthe system component(device).If the fault persists after checkingthe connections, replace the unit'scontrol board.This alert code iscleared by pressingthe clear button onthe Installer AlertsTab.

tActual Displayed Alert TextThermostatThe thermostat does not knowthe capacity (tonnage) of theindoor or outdoor unit.Component or System OperationalState and Troubleshooting Tips 36CriticalThermostatThe system has been heating forat least 15 minutes without ademand for heating. 37CriticalThermostatThe system has been cooling forat least 15 minutes, without ademand for cooling. 5The applicable system componentis missing the programmed unitcapacity.How to Clear AlertCodeAutomatically clearswhen the systemdetects that the issueno longer exists.Go to applicable system componentand program the unit capacitymanually (see the unit installationinstruction for programminginstructions).Remove power to thermostat beforeprogramming the unit control.Once programming is complete,reconnect thermostat wires andreconfigure system.Run the system in diagnostic modeand verify that it matches actualequipment operation.Automatically clearswhen the systemdetects that the issueno longer exists.Check for other alert codes thatmay be preventing the system fromoperating as expected.Check all heating equipment todetermine cause of heatingdemand.Recycle power.Run the system in diagnostic modeand verify that it matches actualequipment operation.Automatically clearswhen the systemdetects that the issueno longer exists.Check for other alert codes thatmay be preventing the system fromoperating as expected.Check all cooling equipment toComfort Sync 7-Day Programmable Communicating Thermostat

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting TipsHow to Clear AlertCodedetermine cause of coolingdemand.38CriticalThermostatThe system has not been able toturn on the heating for more than45 minutes. 39CriticalThermostatThe system has not been able toturn on the cooling for more than45 minutes. 40MinorOutdoor Unit The HP could not progress theroom temperature 0.5 Ftowards the set point in 306 Recycle power.The system will go offline for 60minutes and will attempt to restartitself.Automatically clearswhen the systemdetects that the issueno longer exists.Run the system in diagnostic modeand verify that it matches actualequipment operation.Check for other alert codes thatmay be preventing the system fromoperating as expected.Check all heating equipment todetermine cause.Recycle power.The system will go offline for 60minutes and will attempt to restartitself.Run the system in diagnostic modeand verify that it matches actualequipment operation.This alert code willautomatically clearwhen the systemdetects the issue hasno longer exists.Check for other alarms/codes thatmay be preventing the system fromoperating as expected.Check all cooling equipment todetermine cause.Recycle power.The heat pump has locks out on the"HP heating Lockout Time" settingin the room thermostat Clears when heatpump comes out of"HP heating Lockout

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting Tipsminutes. "Installer/System Devices / HeatPump screen" (Default is 120minutes). The issue is the heatpump could not progress the roomtemperature by 0.5F towards theset point in 30 minute.System will switch to secondaryheat source.(Secondary source is electricheat or furnace in dual -fuelapplications). (Software issue: The issue isthe 30-minute timer is notresetting to 30 minutes whenthe temperature raises 0.5 F.After 30 minutes, it causesalarm 40 to be set(erroneously), and the heatpump goes into the “HP heatingLockout Time” mode whichindicates that the heat pumpcould be off for a maximum of120 minutes. Range can be setbetween 60 to 120 minutes) 105CriticalThermostat,furnace, airhandler, outdoorA system component has lostcommunication with the system.7 How to Clear AlertCodeTime" timer setting(Range can be setbetween 60 to 120minutes. Default is 120minutes).Set the low balance point and highbalance point as close together aspossible. (This is 3 F difference –Example: set high balance point at35 F and low balance point wouldset at 32F).Below the low balance point, thefurnace will heat the home /between the low and high balancepoint, the heat pump and furnacewill heat the home.If the heat pump cannot raise thetemperature 0.5 F in 30 minutes onthe zone or zones, the “HP heatingLockout Time” (Location: Installerset/System devices/HP heatingLockout Time / default is 120minutes) will lock the heat pump off.The gas furnace will finish theheating cycle / when the outdoortemperature is above the highbalance point.The gas furnace is locked out andall the heat is provided by the heatpump.System component (device) isunable to communicate.Automatically clearswhen the systemdetects the issue noComfort Sync 7-Day Programmable Communicating Thermostat

AlertCodePriorityConditionSystemComponentActual Displayed Alert TextComponent or System OperationalState and Troubleshooting Tips unit, equipmentinterface ordamper controlmodule 110CriticalFurnaceThe component line voltage istoo low. 111CriticalFurnaceThe component line powervoltage wiring is reversed. 112CriticalFurnaceThe reporting component cannotfind earth ground. 8This may indicate the existence ofother active alert codes.How to Clear AlertCodelonger exists.In most cases errors are related toelectrical noise. Verify that highvoltage power is separated from thelow voltage communication wires.Check for incorrectly wired or looseconnections between systemcomponents (devices).Check for a high voltage source ofnoise close to the system.This alert code may appear during abrownout.Line voltage is below its designedoperating value.Automatically clearswhen the systemdetects the issue nolonger exists.Check and correct the power linevoltage.The unit is reporting that its powerand neutral lines are reversed.Turn off the power to the systemand correct the line power voltagewiring.Automatically clearswhen the systemdetects the issue nolonger exists.System resumes normal operationfive seconds after critical conditionis recovered.The thermostat will shut down thesystem.Provide proper earth ground to theequipment.Automatically clearswhen the systemdetects the issue nolonger exists.