EdgeStar WAC8000W Owner's Manual - Page 19

Normal Sounds  High Pitched Chatter- High efficiency compressors may have a high pitched chatter during the cooling cycle.  Sound of Rushing Air- At the front of the unit, you may hear the sound of rushing air being moved by the fan.  Gurgle/Hiss- Gurgling or Hissing noise may be heard due to refrigerant passing through evaporator during normal operation.  Vibration- Unit may vibrate and make noise because of poor wall or window construction or incorrect installation.  Pinging or Switching- Droplets of water hitting condenser during normal operation may cause these sounds. Energy Saving Guide Read and follow the guide below to get the best performance and efficiency from your window air conditioner:  Do not cover the air outlet (exhaust) while in use.  Use the timer to operate the unit before it is needed. For example, set the timer to turn on the unit in cooling mode for 3 or more hours to cool the room before you arrive. You may want to operate the unit all day if you live in a warmer climate.  Minimize the heat sources (direct sunlight, computers, servers, people, etc.) in the room.  Close all windows and doors.  Use the unit in a contained room. For example, a room with four walls and a ceiling, instead of a partitioned studio, or warehouse.  Make sure the unit is secure with no gaps where air can escape.  Minimize the amount of humidity in the room. For example, run the unit as a dehumidifier.  To prolong the compressor's life, please wait at least 3 minutes before turning the unit back on after shutting it off.  Inspect and keep the air filters clean by cleaning regularly.  Perform routine maintenance. KoldFront Window Air Conditioner 16