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— HEAT mode of “I FEEL CONTROL” —
1. Indoor fan speed control
(1) Followings are the fan speed in AUTO.
Set temperature minus room temperature: 2 degrees or more················································· Hi
Set temperature minus room temperature: 1 degree or more and less than 2 degrees··········· Me
Set temperature minus room temperature: less than 1 degree················································· Lo
(2) Cold air prevention control
The fan runs at set speed when the indoor coil thermistor RT12 temperature exceeds 22°C. The fan operates at VLo
when the temperature is below 18°C. But the fan stops when the indoor fan operates at VLo and the temperature is
15°C or less.
NOTE : At initial in hysteresis this control works.
(3) New warm air control.
When compressor starts in heating operation or after defrosting, the fan changes the speed due to the indoor coil ther-
mistor RT12 temperature to blow out warm air.
After releasing of cold air prevention, when the indoor coil temperature is 37°C or above, the fan speed shifts to the set
speed, and when the fan speed is changed by the remote controller, the fan speed is the set speed.
When the indoor coil temperature is less than 37°C, the fan speed is controlled by time as below.
<Time condition> <Indoor fan speed>
less than 2 minutes························Lo
2 minutes to 4 minutes···················Me
4 minutes or more··························Hi
The upper limit of the fan speed is the set speed.
If the thermostat turns off, this operation changes to flow soft control.
(4) Flow soft control
After the thermostat turns off, the indoor fan operates at VLo.
NOTE : When the thermostat turns on, the fan operates at the set speed. Due to the cold air prevention control, the fan
does not start until the indoor coil thermistor RT12 reads 22°C or more.
Operation time chart
Example
NOTE ● Coil frost prevention during DRY mode of “I FEEL CONTROL”
The operation is as same as coil frost prevention during COOL mode of “I FEEL CONTROL”.
However the indoor fan speed becomes the set speed or Lo.
1 deg.
1.66 deg.
2 deg.
4 deg.
Initial temperature difference Fan speed
Thermostat
Indoor fan
Outdoor fan
compressor
1st ON
8 min.
1 min.
4 min.
3 min.
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
Released
Cold Air Prevention
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