Mitsubishi Electric CITY MULTI MA PAR-41MAA Instruction Book page 46

Function settings
46
will appear on 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).