Comfortable Timer Setting; Outline Of Heating Operation - Mitsubishi Heavy Industries SRK20ZD-S1 Technical Manual

(6) Comfortable timer setting

If the timer is set at ON when the operation select switch is set at the cooling or heating, or the cooling or heating in auto mode operation
is selected, the comfortable timer starts and determines the starting time of next operation based on the initial value of 15 minutes and the
relationship between the room temperature at the setting time (temperature of room temperature sensor) and the setting temperature.
(Max. 60 minutes)
Operation mode
3 < Room temp. – Setting temp.
At cooling
3 < Setting temp. – Room temp.
At heating
Notes (1) At 5 minutes before the timer ON time, operation starts regardless of the temperature of the room temperature sensor (Th1).
(2) This function does not actuate when the operation select switch is set at the dehumidifying as well as the dehumidifying in the auto mode.
However, the operation of item (1) above is performed during the dehumidifying in the auto mode.
(3) During the comfortable timer operation, both the run light and timer light illuminate and the timer light goes off after expiration of the timer, ON setting time.
(Example) Heating
Setting temperature
Room temperature
(7) Outline of heating operation (Heat pump type only)
(a) Operation of major functional components
Functional
components
Indoor fan motor
Flaps
Display
52C
Outdoor fan motor
4-way valve
Electric expansion valve
(b) Fan speed switching
Fan speed switching
Flow control
Air scroll
Swing flap
Swing stop
(i) Auto fan control
The indoor fan is automatically controlled in accordance with the difference between the room temperature (detected by the
room temperature sensor) and the thermostat setting as shown below.
Operation start time correction value (Min.)
+5
+5
Operation starting time
Time 15 min. 10 min.
earlier earlier
Item
When the compressor
command is OFF
ON
ON or OFF
Lights up
ON
OFF
Depending on the stop mode
AUTO
Auto fan control
Speed 8
-5 -4
1 < Room temp. – Setting temp. < 3
=
No change
2 < Setting temp. – Room temp. < 3
=
No change
Corrects the starting time of next operation by
calculating the temperature difference.
¡ If the difference (= Setting temperature – Room tempera-
5 min.
Setting time
earlier
When the compressor
command is ON
ON
ON or OFF
Lights up
ON
ON
ON
Depending on the EEV control
HIGH
Speed 8
Speed 8
Speed 8
Speed 6
-3 -2 -1
Thermostat setting point
187
- -
Room temp. – Setting temp. < 1
–5
Setting temp. – Room temp. < 2
–5
ture) is 4ºC, the correction value is found to be +5 min-
utes from the table shown above so that the starting time
of next operation is determined as follows:
15 min. earlier + 5 min. = 20 min. earlier
↑ ↑
Current operation Correction value
start time
When the compressor goes
OFF due to an anomalous stop.
OFF
Stop position control
Lights up or flashes
OFF after stop mode
OFF
Depending on the stop mode
MED LOW
Speed 6 Speed 4
Speed 6 Speed 4
Speed 6 Speed 4
Speed 4
0
=
=