Due to the low temperature on evaporator, the moisture need to condense on it. It is likely that the evaporator will frost after long time working in the room with lower temperature.

In this case the EAST dehumidifier will stop working automatically and switch into self-defrost mode. The corresponding symbol will be shown on the controller and machine will not dehumidify till the self-defrost mode finish.

Do not worry about the machine, just wait and it will back to work after self-defrost mode finish.