Timer Operation; Silent Mode; Night Setback; Outline Of Heating Operation - Mitsubishi Heavy Industries SRF25ZS-W Service Manual

(ii) HEAT operation
1) In case both lower and upper outlets operation with auto fan speed mode is selected, the
lower outlet will be kept for twenty minutes after the start or until room temperature is
close to reaching the setting point . And then the air outlet will change to both outlets.
That state will be maintained until the switch is turned off.
2) Automatic adjustment of lower air outlet direction prevents stirring up of warm air
and keeps optimum comfort at floor level.

(10) Timer operation

(a) Comfortable timer setting (ON timer)
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.
(b) Sleep timer operation
Pressing the SLEEP button causes the temperature to be controlled with respect to the set temperature.
(c) OFF timer operation
The Off timer can be set at a specific time (in 10-minute units) within a 24-hour period.
(d) Weekly timer operation
Timer operation (ON timer, OFF timer) can be set up to 4 times a day for each weekday.

(11) Silent mode

As "Silent mode start" signal is received from the wireless remote control, it operates by dropping the outdoor fan tap and the
compressor command speed.
Outdoor fan tap
(Upper limit)
Compressor command
speed (Upper limit)

(12) Night setback

As "Night setback" signal is received from the wireless remote control, the heating operation starts with the setting temperature
at 10 ℃ .

(13) Outline of heating operation

(a) Operation of major functional components in heating mode
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
SRF25ZS-W SRF35ZS-W
Cooling Heating Cooling Heating Cooling Heating
4th speed 4th speed 5th speed 4th speed
37 rps 49 rps 46 rps 56 rps
Thermostat ON
ON
ON
ON
ON
SRF50ZSX-W
5th speed 5th speed
43 rps 48 rps
Heating
Thermostat OFF
OFF
ON(HOT KEEP)
OFF
(few minutes ON)
ON
(3 minutes ON)
6
- -
'20 • SRF-SM-311
Failure
OFF
OFF
OFF
OFF