Hitachi RAS-D10CDK Instruction Manual page 11

HOW TO SET THE SLEEP TIMER
Press the (SLEEP) button, and the display changes as shown below.
SLEEP
Explanation of the sleep timer
The device will control the FAN SPEED and room temperature automatically so as to
be quiet and good for people ' s health.
You can set the sleep timer to turn off after 1, ,  or  hours. The FAN SPEED and
room temperature will be controlled as shown below.
Operation with the sleep timer
Function
Cooling
" "
and
dehumidifying
" "
Fan
" "
Mode
Sleep timer
Sleep Timer: The device will continue working for the designated number
of hours and then turn off.
Point the signal window of the remote controller toward the indoor unit,
and press the SLEEP button.
The timer information will be displayed on the remote controller.
The TIMER lamp lights with a beep from the indoor unit. When the sleep
timer has been set, the display indicates the turn-off time.
The room temperature will be
controlled  ° C above the setting
temperature and the FAN SPEED
will be set to LOW setting 0 minutes
after the setting of the sleep timer.
The settings of room temperature and circulation are varied.
1 hour
Operation
Sleep
timer set
0 minutes later  hours later
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Indication
2 hours 3 hours 7 hours
Sleep timer off
 hours later
 hours
later