Olivetti PG L2435 Operation Manual page 78

Note that ambient environmental conditions, such as ventilation, may
cause the machine to respond more slowly.
For more information about configuring settings, refer to Sleep Timer
(Sleep timer timeout setting) section of the Advanced Operation Guide.
Energy Saver Mode
This mode reduces power consumption even more than quick recovery
mode, and allows Sleep mode to be set separately for each function.
To use the printer, press [GO]. The printer will be ready to operate within
16.5 seconds or less.
For more information on Energy Saver settings, refer to Sleep Level Set.
(Sleep level setting) section of the Advanced Operation Guide.
If the Low Power Timer is equal to the Sleep Timer, a Sleep mode is
preceded.
Connecting and Printing 4-29