Sleep Operation - Akai AK-9000-RC User Manual

Instructions (Cont.)

Sleep Operation

The Sleep function is designed for use at night when you want to sleep. It
reduces the unit's operation sound. The Sleep function also enables the set
temperature to rise or drop gradually, so the unit will consume less power at
night-time, running at an adjusted temperature.
• Press the SLEEP button to activate Sleep mode. The air conditioner will
run with a lowered airflow sound from the indoor unit.
• Cooling mode: In Sleep mode, the cooling operation enables the set
temperature to rise gradually to 2°C above the set temperature.
• Heating mode: In Sleep mode, the heating operation enables the set
temperature to drop gradually to 5°C below the set temperature.
• Press the SLEEP button again to deactivate the Sleep mode.
NOTE: Use the Sleep function when you are going to bed. If you set the
Sleep function during the day, the cooling capacity is reduced since
the ambient temperature is too high at daytime.
Basic Heating Principles
The air conditioner absorbs heat from the outdoor air and transfers it indoors
so as to heat the room air. The heating capabilities of this heat pump principle
go up/down with the increase/decrease of the outdoor air temperature.
• It only takes a fairly short time for such hot air circulation system to raise
the room temperature.
• When the outdoor air temperature is very low, the system can be used
together with other heating devices. But good ventilation should be
maintained to ensure personal safety and prevent accidents.
Defrosting
When the outdoor air temperature is very low and humidity is very high, the
heat exchanger of the outdoor unit may frost up, which has negative impacts
upon the efficiency of the heating performance. In such a case, the automatic
defrosting function will activate, which will stop the heating operation for 5-10
minutes to defrost the unit.
• The fans of both the outdoor and indoor units are stopped.
• During the defrosting, the outdoor unit might generate some steam. It is
caused by fast defrosting, which is not a performance failure.
• Upon the completion of the defrosting process, the heating operation will
be resumed.
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