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The operating sound may seem rather loud for 2 to 3 minutes when the unit is first turned
on. This is the sound of the compressor's start-up and is normal.
A soft, swishing noise can be heard immediately after the unit is turned on or off, and also
during operation. This is the sound of the refrigerant flowing inside the unit.
Check the remote control batteries. Replace if necessary.
Try to send the signal again with the remote control pointed directly at the unit's receiver
window.
Check whether the remote control batteries are installed with the polarities properly
aligned.
Water will collect in the bottom tray of the unit. This is normal. Water condenses on the
evaporator coil at the front of the unit and is channeled to the rear where it is picked up
by the condenser fan. The water is blown onto the condenser coil fins and this creates
a "splas
hing" noise which is normal. If excess water builds up in this tray it will drain
outside through a grooved channel in the tray.