Mitsubishi Electric MSZ-G09SV-E1 Service Manual page 28

5. TEMPERATURE buttons
In "I FEEL CONTROL" (h )mode, set temperature is decided by the microprocessor based on the room temperature.
In addition, set temperature can be controlled by TOO WARM or TOO COOL buttons when you feel too cool or too warm.
Each time the TOO WARM or TOO COOL button is speed, the indoor unit receives the signal emits a beep tone.
Fuzzy control
When the TOO COOL or TOO WARM button is pressed, the microprocessor changes the set temperature, consider-
ing the room temperature, the frequency of pressing TOO COOL or TOO WARM button and the user's preference to
heat or cool. So this is called "Fuzzy control", and works only in "I FEEL CONTROL" mode.
In DRY mode of "I FEEL CONTROL", the set temperature doesn't change.
TOO
COOL (MSZ-G09/12SV -
TOO
WARM (MSZ-G09/12SV -
8-1-1. Cool mode of "I FEEL CONTROL"
1. Indoor fan speed control
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.
<MSZ-09SV - , MSZ-G12SV -
E1
Room temperature minus set temperature: 2 degrees or moreover·····························High
Room temperature minus set temperature: Between 1 and 2 degrees ·······················Med.
Room temperature minus set temperature: less than 1 degree····································Low
<MSZ-09SV - , MSZ-G12SV -
E2
Room temperature minus set temperature : 1.7 degrees or more ·······························High
Room temperature minus set temperature : Between 1 and 1.7 degrees·······················Med.
Room temperature minus set temperature : less than 1 degree ·································Low
2. Coil frost prevention
1 Temperature control
The operational frequency of the compressor is controlled based on the temperature of the indoor coil thermistor(RT12).
Temperature of indoor coil thermistor:RT12
approx. 8°C or above
approx. 6°C to 8°C
approx. 4°C to 6°C
approx. 4°C or below
The indoor fan maintains the actual speed of the moment.
2 Time control
When the three conditions as follows have been satisfied for 1 hour and 45 minutes, compressor stops for 3 minutes.
The indoor fan operates at set speed.
a. Compressor has been continuously operating.
b. Indoor fan speed is Low or Med.
c. Room temperature is below 26:.
When compressor stops, the accumulated time is cancelled. 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 26:.
However, when two of the above conditions(b and c.) are satisfied again. Time accumulation is resumed.
TOO
COOL
) / (MSZ-G09/12SV -
E1
TOO
WARM
) / (MSZ-G09/12SV -
E1
Initial temperature difference
>
E1
>
E2
lower at the rate of 6Hz/min
Compressor is turned OFF for 5 minutes when left temperature
continues for 5 minutes or more.
) ... To raise the set temperature 1 ~ 2 degrees (:)
E2
) ... To lower the set temperature 1 ~ 2 degrees (:)
E2
Fan speed
Operation frequency
normal
fixed
lower at the rate of 3Hz/min.
28
Difference between room
temperature and set tem-
perature during operation.
4 deg.
2 deg.
1 deg. 1.7 deg.
3 deg.
1 deg. 1.7 deg.