Carrier 33CS420-01 Owner's Manual page 15

Display Features Display Features
2
UV Light icon - Section 11/15
Appears when the UV bulb should be serviced under normal
conditions. Adjustable from 0 - 1950 days of operation.
AuxHeat icon -
Section 12
Indicates 2nd stage electric strip heat is being used when the
thermostat is programmed for Heat Pump operation.
Humidify/DeHumidify icon -
Indicates the system is currently humidifying/dehumidifying the air.
Lo icon - Section 5
Indicates the lowest recorded outside temperature for the day.
Hi icon - Section 5
Indicates the highest recorded outside temperature for the day.
Sections 9-10
Page 2.5
Carrier