Mitsubishi MCFH-13NV Service Manual page 33

(4) The initial set temperature is decided by the initial room temperature.
Model
COOL mode of
"I FEEL CONTROL"
DRY mode of
"I FEEL CONTROL"
HEAT mode of
"I FEEL CONTROL"
1 When the system is restarted with the remote controller, the system operates with the previous set temperature regard-
less of room temperature at restart.
The set temperature is calculated by the previous set temperature.
(5) TEMPERATURE buttons
In "I FEEL CONTROL" mode, set temperature is decided by the microprocessor based on the room temperature.
In addition, set temperature can be controlled by or TOO WARM or TOO COOL buttons when you feel too warm or too
cool. Each time the TOO WARM or TOO COOL button is pressed, the indoor unit receives the signal and 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
... To raise the set temperature 1~2 degrees(°C)
TOO
WARM
... To lower the set temperature 1~2 degrees(°C)
— COOL mode of "I FEEL CONTROL" —
1. Indoor fan speed control
Indoor fan operates at the set speed by FAN SPEED CONTROL button.
In AUTO the fan speed is as follows.
Room temperature minus set temperature : 2 degrees or more······································High
Room temperature minus set temperature : Between 1 and 2 degrees···························Med.
Room temperature minus set temperature : less than 1 degree······································Low
2. Coil frost prevention
Temperature control
When the indoor coil thermistor RT12 reads -1°C or below, the coil frost prevention mode starts immediately.
However, the coil frost prevention doesn't 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 RT12 still reads below -1°C, this mode prolonged until the RT12 reads over -1°C.
Time control
When the three 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 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 26°C.
However, when two of the above conditions (b. and c.) are satisfied again, Time accumulation is resumed.
Initial room temperature
26: or more
25: to 26:
23: to 25:
less than 23:
Initial temperature difference
33
Initial set temperature
24:
Initial room temperature
minus 2:
Initial room temperature
minus 2:
26:
Fan Speed
1
Difference between room
temperature and set temperature
during operation
2deg. 4deg.
1deg. 1.7deg.