Canon IMAGERUNNER 2016 Reference Manual page 37

■ For safety reasons, turn OFF the control panel power switch of the
machine when it will not be used for a long period of time, such as
overnight. As an added safety measure, turn OFF the main power switch,
and disconnect the power cord when the machine will not be used for an
extended period of time, such as during consecutive holidays.
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1-10 Installation Location and Handling