27
8-1-3. HEAT mode of “I FEEL CONTROL”
1. Indoor fan speed control
(1) In AUTO the fan speed is as follows.
Set temperature minus room temperature: 4 degrees or more ··········································High
Set temperature minus room temperature: Between 2 and 4 degrees· ·····························Med.
Set temperature minus room temperature: less than 2 degree··········································Low
(2) Cold air prevention control
MSZ09UN
1
When the compressor is not operating,
(
1
) if the temperature of indoor coil thermistor RT12 is 64°F or less, the indoor fan stops.
(
2
) if the temperature of indoor coil thermistor RT12 is more than 64°F, the indoor fan operates at Very Low.
Initial temperature difference
Fan speed
2 deg. 3 deg.
4 deg. 7 deg.
Difference between room
temperature and set
temperature during
operation
2
When the compressor is operating,
(
1
) if the temperature of RT12 is 72°F or more, the indoor fan operates at set speed.
(
2
) if the temperature of RT12 is less than 72°F and
(
1
) if the temperature of room temperature thermistor RT11 is 59°F or less, the indoor fan stops.
(
2
) if the temperature of room temperature thermistor RT11 is more than 59°F, the indoor fan operates at Very
Low.
NOTE : If the temperature of RT12 reads from 64°F to 72°F at the air conditioner starting and also after defrosting,
this control works.
Released
Cold Air Prevention
64
°
F 72
°
F
Indoor fan speed
Set speed
Very Low or stop
Indoor coil thermistor
RT12 temperature
MSZ12UN
When the compressor is operating,
(
1
) if the temperature of indoor coil thermistor RT12 is less than 64°F or, the indoor fan operates at Very Low.
But if the temperature of room temperature thermistor RT11 is 59°F or less, the fan stops.
(
2
) if the temperature of indoor coil thermistor RT12 is more than 72°F, the indoor fan operates at set speed.
3. Coil frost prevention
• The operation is as same as coil frost prevention during COOL mode of “I FEEL CONTROL”.
• Indoor fan operates at the set speed and the compressor stops for 5 minutes, because protection (Coil frost
prevention) has the priority.
However, when coil frost prevention works while the compressor is not operating, the speed becomes the set speed.
Operation time chart
Example
Thermostat
Indoor fan
Outdoor fan
Compressor
ON
8 min.
1 min.
4 min.
3 min.
ON
OFF
OFF
OFF
OFF
OFF
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OB297--1.qxp 04.2.4 4:20 PM Page 27
Summary of Contents for Mr.Slim MSZ09UN W
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