42
4-1-3. HEAT mode of “I FEEL CONTROL”
2. Indoor fan speed control
(1) Indoor fan operates at the set speed by FAN SPEED CONTROL button.
In Auto the fan speed is as follows.
Set temperature minus room temperature: 2
:
or more··················································· High
Set temperature minus room temperature: Between 1 and 2
:
····································· Med.
Set temperature minus room temperature: less than 1
:
·················································· Low
1
:
1.7
:
2
:
4
:
Initial temperature difference
Fan speed
Difference between room
temperature and set tem-
perature during operation
(2) Cold air prevention control
1
When the compressor is not operating,
(
1
) if the temperature of indoor coil thermistor RT12 is 0°C or less, the fan stops.
(
2
) if the temperature of indoor coil thermistor RT12 is more than 0°C, the fan operates at Very Low.
2
When the compressor is operating,
(
1
) if the temperature of RT12 is 40°C or more, the fan operates at set speed.
(
2
) if the temperature of RT12 is less than 40°C and
(
1
) if heating operation starts after defrosting, the fan stops.
(
2
) if the temperature of room temperature thermistor RT11 is 15°C or less, the fan stops.
(
3
) if the temperature of room temperature thermistor RT11 is more than 15°C, the fan operates at Very Low.
NOTE : When 3 minutes have passed since the compressor started operation, this control is released regardless of the
temperature of RT12.
-0.3
:
0.3
:
Set temperature
Difference between room
temperature and set tem-
perature during operation
1. Thermostat control
Thermostat is ON or OFF by difference between room temperature and set temperature.
Initial temperature difference Thermostat
Room temperature minus set temperature : less than -0.3
:
··············································ON
Room temperature minus set temperature : 0.3
:
or more·················································OFF
2. Indoor fan speed control
Indoor fan operates at the set speed by FAN SPEED CONTROL button.
When thermostat OFF (compressor OFF) fan speed becomes Very Low.
3. The operation of the compressor and indoor fan/ outdoor fan
Compressor operates by temperature control and time control.
1
Set temperature is controlled to fall 2°C from initial room temperature.
2
Operational frequency of compressor during operation is fixed to 30Hz.
4. Coil frost prevention
Coil frost prevention is as same as COOL mode of “I FEEL CONTROL”. (4-1-1.3.)
The indoor fan maintains the actual speed of the moment. However, when coil frost prevention works while the compressor
is not operating (= indoor fan speed Very Low), it’s speed becomes the set speed.
5. Low outside temperature operation
Low outside temperature operation is as same as COOL mode of “I FEEL CONTROL”. (4-1-1.4.)
-0.3
:
0.3
:
1. Thermostat control
Thermostat is ON or OFF by difference between room temperature and set temperature.
Initial temperature difference Thermostat
Room temperature minus set temperature : 0.3
:
or more················································ON
Room temperature minus set temperature : less than -0.3
:
············································OFF
Set temperature
Difference between room
temperature and set tem-
perature during operation
4-1-2. DRY mode of “I FEEL CONTROL”
The system for dry operation uses the same refrigerant circuit as the cooling circuit.
The compressor and the indoor fan are controlled by the room temperature.
By such controls, indoor flow amounts will be reduced in order to lower humidity without much room temperature decrease.
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