Mitsumi electronic -2 User Manual

38

(1) Cold air prevention in HEAT operation

When any of the following conditions occurs in HEAT operation, the vane angle changes to Vertical position automati-
cally to prevent cold air blowing on users.

 Compressor is not operating.
 Defrosting is performed.
 Indoor coil thermistor reads 75.2°F or below.
 Indoor coil thermistor temperature is raising from 75.2°F or below, but it does not exceed 102.2°F.

Indoor coil thermistor temperature

Horizontal vane

Set position

Vertical Position

102.2°F

(39°C)

75.2°F
(24°C)

Released

Cold Air Prevention

NOTE: The horizontal vane automatically moves in certain intervals to determine its position, and then it returns to the set 

position. 

• As for indoor fan motor (upper), refer to "Indoor fan speed control (2-1.2, 2-2.2, 2-3.2)" and "INDOOR FAN MOTOR 

CONTROL (2-5.)".

35.6°F

(2°C)

44.6°F

(7°C)

Difference between room temperature and 
set temperature during operation

Damper
OPEN
CLOSE

95°F

(35°C)

104°F

(40°C)

Indoor coil thermistor temperature

Damper
OPEN
CLOSE

Difference between 
room temperature and 
set temperature 
during operation

Indoor coil thermistor 
temperature

<SWING operation>

In swing operation of ECONO COOL operation mode, the initial airflow direction is adjusted to "Horizontal".

According to the temperature of indoor coil thermistor at starting of this operation, next downward blow time is decided. 

Then when the downward blow has been finished, next horizontal blow time is decided. 

For initial 10 minutes the swing operation is performed in table G~H for quick cooling. 

Also, after 10 minutes when the difference of set temperature and room temperature is more than 35.6°F, the swing 

operation is performed in table D~H for more cooling.

The air conditioner repeats the swing operation in various cycle as follows.

Temperature of indoor 

coil thermistor (°F)

Downward blow time (second)

Horizontal blow time (second)

A

59 or less

2

23

B

59 to 63 

5

20

C

63 to 64 

8

17

D

64 to 68 

11

14

E

68 to 70 

14

11

F

70 to 72 

17

8

G

72 to 75 

20

5

H

More than 75 

23

2