Carrier ZC - Manual (Page 8)

To increase or reduce the temperature in the room,
press the buttons (+) or (-), as required.
To display the room temperature, press buttons (+)
and (-) simultaneously for 3 seconds.
These buttons set the time hour by hour, up to 12 hours.
8
When this function is activated, the letter is displayed
on the panel.
To cool, press the Cooling mode button.
To heat, press the Heating function button.
When this function is activated, the letter is displayed
on the panel.
To cancel this function, press the Timer
button again, and set the time to zero.
NOTE
The temperature ranges from 18ºC / 65°F
to 32ºC / 90°F. To set the maximum or the
minimum, the unit beeps twice.
NOTE
Only for models with heat feature.
NOTE