Mitsubishi Electric PAR-CT01MAA-SB Instruction Book page 42

Function settings
42
will appear on the Status display and the Main
display in the Full mode when the Night setback
function is enabled.
appears when the timer is disabled by the
centralized control system.
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 diagnosis, when the clock is not set, during
function setting, when the system is centrally controlled
(On/Off operation, temperature setting, or timer
operation from local remote controller is prohibited).