Panasonic CW-606TU Operating Instructions Manual page 9

BEFORE CALLING FOR SERVICE
Unit does not cool
properly
Temp Control is set at lower number levels.
Air filter is soiled.
Room is warm. Wait for the room temperature to drop.
Ventilation lever is set OPEN.
The air circulation is impeded by drapes, furniture, etc.,
or by an improper louver setting.
Normal Operating Sound:
A soft clicking sound when compressor turns on and off.
Refrigerant circulating sound when compressor is turned on.
Low humming sound when the unit is in operation.
For noise heard other than mentioned above, contact your
nearest servicenter.
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