Panasonic CZ-RTC2 User Functions Manual page 2

Heating Mode: This mode is used for normal heating operation.
Standby: For several minutes after the start of heating operation the indoor
fan will not start running(or at very low speed) until the indoor heat
exchanger has warmed up sufficiently. This prevents a cold air draft from
entering the space. During this period the Standby icon remains displayed.
Standby Icon
Cooling Mode: Used for normal cooling operation
Fan Mode: Used to run fan only without heating or cooling operation.
Heating Mode Icon
Mode select Button
Cooling Mode Icon
Mode select Button
Fan Mode Icon
Mode select Button