Overview of the iR2030/iR2025/iR2022i/iR2018i 2-92Basic OperationsFunctions That Conserve PowerYou can conserve power efficiently by setting the Sleep mode.You can set the machine to enter the Sleep mode whenever you desire, by pressing the controlpanel power switch, or specify to have the machine enter the Sleep mode at a preset time (See“Auto Sleep Time,” on p. 4-62). To reactivate the machine, press the control panel power switchagain.NOTE• The touch panel display turns OFF when the machine enters the Sleep mode.• The machine can continue to receive I-fax/fax documents, and process or print data sent fromcomputers even if the machine is in the Sleep mode.• The machine may not enter the Sleep mode completely depending on certain conditions. (For moreinformation, see “Energy Consumption in the Sleep Mode,” on p. 4-33.)• Turn the control panel power switch OFF when not using the machine for a prolonged period of time, forexample, at night.• The Sleep mode can be set from OFF (0) or 3 to 30 minutes. The default setting is ‘5 min(s).’ (See “AutoSleep Time,” on p. 4-65.)• If Energy Consumption in Sleep Mode is set to ‘Low’, it may take more than 10 seconds for the touchpanel to be displayed after pressing the control panel power switch.