Carrier 38CKC042 Air Conditioner "reset button 2003" Questions

button comfort control, turn the thermostat off. While holding down the mode and zone buttons, turn the tstat back on and hold the buttons until FF appears in the display. Release the buttons and then

...2003 Triple E Commander - I reset the thermostat by pressing the top and bottom buttons on start up - "FF" code shows up, but now it doesn't recognize Zone 2 (the second unit) Any suggestions? In the ...