Carrier PTACSTAT-NP-HC What if, Battery icon is displayed, There is a power outage

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TROUBLE SHOOTING YOUR THERMOSTAT

What if...

The battery icon is displayed

The battery icon appears on the display only when the battery starts to lose power. Replace it when one-third of the icon is black. If your thermostat is battery powered and you wait until the icon is just a silhouette with no black bars, you will slowly lose thermostat functions until it doesn’t work at all.

“Aux heat on” is displayed (heat pump systems only)

Aux heat on is auxiliary heat. It applies only to the heat pump version. When it is displayed, it means the unit is heating with the electric heater. This can happen manually by setting the mode to Em Heat or automatically, if the unit can not keep up with demand running in heat pump mode.

There is a power outage

If you lose electricity and have batteries installed, the thermostat will continue to display the indoor temperature because it has a battery backup power source. This means that even though your heating and cooling system doesn’t work, you will still be able to monitor the room temperature.

NOTE: With or without batteries, any previous changes to the settings will be saved when there is a power outage.

My Heat Pump unit is operating in cooling when it should be heating

Most likely, the reversing valve is setup wrong in the advanced configuration. Check reversing valve option above in the configuration setup.

My Thermostat does not show room temperature

There is an option in the advanced configuration setup to display set point and room temperature. Check the configuration setup above.

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Contents Installation Instructions Operating Manual Page Safety Considerations Table of ContentsModels Installation ConsiderationsPower IntroductionThermostat Location InstallationBatteries Mounting to a horizontal junction boxElectrical Operation Hazard Install ThermostatEnvironmental Hazard Secure Wires to Terminal Strip Terminal Designations Attach Comfort Series Programmable Thermostat Configuration Options Summary Set Thermostat ConfigurationOption 01 Equipment type Configuration Options SelectionTo Enter the Advanced Configuration Mode Option 10 Reversing valve HP only Option 03 Fahrenheit/CentigradeOption 04 Not used on a Ptac system Option 07 Not used on a Ptac systemOption 16 Maximum Cycles Per Hour Option 13 Room Air Temperature OffsetOption 11 Minimum Deadband Between Heating And Cooling Option 27 Maximum Heating Setpoint Option 18 Backlight ConfigurationOption 17 Minimum Time Between Equipment Stages HP only Option 26 Minimum Cooling SetpointCheck Thermostat Operation Option 99 Reset to Factory DefaultsChecklist Button Identification Operating the ThermostatDisplay backlighting On-Screen IndicatorsUsing the fan Setting the temperatures for heating and coolingTurn the unit off Installing or replacing the batteriesUsing emergency heat heat pump units only Page What if Battery icon is displayedThere is a power outage My Thermostat does not show room temperatureThere are icons flashing on the thermostat display You get a system error messageThermostat Limited Warranty Warranty Conditions Limited Warranty for ThermostatThis Warranty does not Cover Page Outputs C Thermostat Typical Installation Wiring DiagramsThermostat Configuration Record Catalog No PTACSTAT---NP---01SI
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