Ductless Heat Pump FAQ's

For models such as Daikin Emura, Daikin Aurora, LV Series, and 19 Series.

Ductless Heat Pump Indoor Unit

ductless heat pumps


The flaps do not start swinging immediately.

The air conditioner is adjusting the position of the flaps. The flaps will start moving soon.

The air conditioner stops generating airflow during HEAT operation.

Once the set temperature is reached, the airflow rate is reduced and operation stopped in order to avoid generating a cool airflow. Operation will resume automatically when the indoor temperature falls.

HEAT operation stops suddenly and a flowing sound is heard.

The outdoor unit is defrosting. HEAT operation starts after the frost on the outdoor unit has been removed. This can take about 4 to 12 minutes.

Operation does not start soon.

There are two reasons why the operation would restart:

  • When the unit is turned on again soon after being turned off.
  • When the mode was reselected.
    • This is to protect the air conditioner. 
    • You should wait for about 3 minutes.

Different sounds are heard.

A Sound like Flowing Water

  • This sound is generated because the refrigerant in the air conditioner is flowing.
  • This is a pumping sound of the water in the air conditioner and can be heard when the water is pumped out from the air conditioner during COOL or DRY operation.
  • The refrigerant flows in the air conditioner even if the air conditioner is not working when the indoor units in other rooms are in operation.

Blowing Sound

  • This sound is generated when the flow of the refrigerant in the air conditioner is switched over.

Ticking Sound

  • This sound is generated when the cabinet and frame of the air conditioner slightly expand or shrink as a result of temperature changes.

Whistling Sound

  • This sound is generated when refrigerant flows during defrosting operation.

Clicking Sound During Operation or Idle Time

  • This sound is generated when the refrigerant control valves or the electrical parts operate.

Clopping Sound

  • This sound is heard from the inside of the air conditioner when the exhaust fan is activated while the room doors are closed. Open the window or turn off the exhaust fan.

Ductless Heat Pump Outdoor Unit

Daikin Emura Outdoor Unity


Operating sound is loud.

  • When frost forms on the heat exchanger of the outdoor unit, the operating sound level increases slightly.

The outdoor unit emits water or steam.

In HEAT operation

  • The frost on the outdoor unit melts into water or steam when the air conditioner is in defrosting operation.

In COOL or DRY operation

  • Moisture in the air condenses into water on the cool surface of the outdoor unit piping and drips.


Have a question that is not listed here? Contact us today!

We will be happy to help you with your indoor or outdoor unit.