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This printer has the following energy saving functions:
Sleep mode
If the printer remains inactive for a specified period after entering Fusing Unit Off mode, it enters Sleep mode to further reduce the power consumption. The printer also enters Sleep mode when:
The printer waits before entering Sleep mode is set in [Sleep Mode Timer]
It is the day and time specified in [Weekly Timer]
When the printer is in Sleep mode, only the [Energy Saver] key and the [Check Status] key are usable. (for SP C342DN)
The printer can print jobs from computers.
You can change the amount of time that the printer waits before switching to Sleep mode.
For details about setting [Sleep Mode Timer] and [Weekly Timer], see:
To exit Sleep mode, do one of the following:
Press one of the keys on the control panel (for SP C340DN)
Press the [Energy Saver] key or [Check Status] key (for SP C342DN)
Start print jobs
ECO Night Sensor
ECO Night Sensor can detect darkness and automatically turn off this product's power.
If ECO Night Sensor is enabled and detects darkness in a room after the lights are turned off, the sensor automatically turns the power off and reduces the power consumption of this product to 1W or less.
The default settings of ECO Night Sensor are enabled.
To change the settings, see:
The ECO Night Sensor function's factory default is [Auto Power Off Only]. If the printer is located in an environment where the ambient light level is low (such as in a hallway or a location with motion sensor lighting), it is advisable that you either keep this function disabled or adjust its sensitivity.
You can configure the printer to automatically turn its power on when it detects an increase in the ambient light level. The printer may also react to daylight and turn its power on. If the printer is located in an environment where it is exposed to direct sunlight, it is advisable that you do not change the factory default configuration and only enable [Auto Power Off Only].
When the printer is in Sleep mode, the [Energy Saver] key flashes slowly. (for SP C342DN)
The energy saving functions will not activate when:
Communicating with external devices
The hard disk is active
A warning message is displayed
The service call message is displayed
Paper is jammed
The printer's covers are opened
Toner is being replenished
The printer settings screen is displayed
Fixed warm-up is in progress
Data is being processed
Operations are suspended during printing
The Data In indicator is on or flashing
The sample print, locked print, hold print, or stored print screen is displayed
Accessing the printer using Web Image Monitor
The printer consumes less energy when in Sleep mode, but it takes longer to start printing.
If two or more energy saving functions are set, the function for which the predetermined conditions to enter energy saving mode are met takes effect first.
