EA1500 - Maintenance
It is recommended to wash the filter twice a year in a hot water and mild soap solution. Let the filter dry before reinstalling it in the unit. Then reset the filter maintenance indicator on the wall control by introducing a small rod inside the reset hole.
It is also recommended to check the outside fresh air intake port once a year, to ensure there are no leaves, twigs, ice or snow that can be drawn in the unit.
WARNING: Always unplug the unit before performing biannual or annual maintenance.