Mitsubishi Electric Mr.Slim Zuba Central User Manual page 16

The time setting is made in hour increments.
Note:
*1. Weekly Timer/Simple Timer/Auto Off Timer cannot be used at the same time.
*2. The simple timer will not operate when any of the following conditions is in
effect. The timer is off; the system is in malfunction state; a test run is in
progress; the remote controller is undergoing self-check or remote controller
check; the user is in the process of selecting a function; the user is in the process
of setting the timer; the system is under central control. (Under these conditions,
On/Off operation is prohibited.)
<How to Set the Simple Timer>
1. Be sure that you are at a standard control screen, and that the simple timer
indicator is visible in the display (at [1]).
When something other than the Simple Timer is displayed, set it to SIMPLE
TIMER using the function selection of remote controller (see 8.[3] (3)) timer
function setting.
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