Photoconductor Unit Heater 
(mainly Asia)
You can turn on the photoconductor unit heater to prevent images from blurring, which may occur in humid conditions.
Press [Settings] on the Home screen.
Press [Machine Features Settings]
[Maintenance][PCU Heater].
Select [On] or [Off], and then press [OK].
After completing the procedure, press [Home] (
).