Toshiba RAS-07PKVP-E Owner's Manual page 28

Before asking for servicing or repairs, check the following points.
The PURE indicator (Orange) turns on.
• The indicator may turn on if the moving panel is not firmly closed.
Sounds made from the indoor unit
• The ion charger unit may make a humming, clicking, or buzzing sound during electrical air purifying or cleaning operation.
• When the power is turned on or the air conditioner is stopped, the vertical air flow louvers may make a rattling sound or
shuttling sound.
• Some parts may expand or shrink due to temperature fluctuations, and this can result in a slapping sound.
• When the refrigerant is flowing, a hissing sound or gurgling sound can result.
• A hissing sound can be made when the air conditioner is switched to defrosting operation during heating operation.
• An operation sound is made when the moving panel is opened and closed.
Sounds made from the outdoor unit
• A rustling sound can be made when the air conditioner is switched to defrosting operation during heating operation.
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