What does it mean when 'Cool On' or 'Heat On' is flashing in the display?

When 'Cool On' or 'Heat On' is flashing in the display, the compressor minimum-off timer is active, which prevents the compressor from restarting too early after a shutdown. You should wait up to five minutes for the cooling or heating system to turn on. When the minimum-off timer expires, 'Cool On' or 'Heat On' will appear solidly in the display and the compressor and fan will turn on. (Pages 14, 22)