Mitsumi electronic MUY-GENA Manuale Utente

4

Indoor fan operates continuously at the set speed by FAN SPEED CONTROL button regardless of the thermostat's OFF-

ON.

In AUTO the fan speed is as follows.

Thermostat turns ON or OFF by the difference between room temperature and set temperature.

Set temperature is as shown on the right chart.

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 tem-

perature.

By such controls, indoor flow amounts will be reduced in order to 

lower humidity without much room temperature decrease.

95(35)

86(30)

77(25)

68(20)

59(15)

50(10)

50        59        68         77          86        95

Set temperature [°F(°C)]

Initial room temperature [°F(°C)]

(10)      (15)      (20)      (25)        (30)     (35)

 Temperature control

When the indoor coil thermistor RT12 reads 37°F (3°C) or below the coil frost prevention mode starts immediately.

However, the coil frost prevention does not work for 5 minutes since the compressor has started.

The indoor fan operates at the set speed and the compressor stops for 5 minutes.

After that, if the indoor coil thermistor still reads below 37°F (3°C), this mode is prolonged until the indoor coil thermistor 

reads over 37°F (3°C).

 Time control

When the 3 conditions as follows have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.

a. Compressor has been continuously operating.

b. Indoor fan speed is Low or Med.

c. Room temperature is below 79°F (26°C).

When compressor stops, the accumulated time is cancelled and when compressor restarts, time counting starts from the 

beginning.

Time counting also stops temporarily when the indoor fan speed becomes High or the room temperature exceeds 79°F (26°C). 

However, when two of the above conditions (b. and c.) are satisfied again, time accumulation is resumed.

ON

-1.8°F(-1°C) or more

OFF

less than  -1.8°F(-1°C) 

-1.8°F

-1.35°F

(-1°C)

(-0.75°C)

Room temperature minus
set temperature (During operation)

Room temperature minus
set temperature (Initial)

Thermostat

High

3.15°F(1.75°C) or more

Med.

between 1.8 and 3.15°F

Low

less than 1.8°F(1°C) 

3.15°F

(1.75°C)

5.4°F

(3°C)

1.8°F

(1°C)

Fan speed

Room temperature minus
set temperature (Initial)

Room temperature minus
set temperature (During operation)

Compressor
Outdoor fan

Indoor fan

OFF

( Continuously at set speed)

ON

ON