will appear on the Main display in the Full mode when
the Night setback function is enabled.
The Night setback will not work in the following cases:
when the unit is in operation, when the Night setback
function is disabled, during an error, during check (in the
service menu), during test run, during remote controller di-
agnosis, when the clock is not set, during Function setting,
when the system is centrally controlled (On/Off operation
or temperature setting from local controller is prohibited).