Mitsubishi Heavy Industries SCM71ZM-S1 Technical Manual page 167

(b) Outline of control
(i) Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.
Indoor unit
fan speed
Compressor
speed
(ii) The indoor unit check the current area by every 5 minutes, and operate by the next checking.
(c) Other
When the outdoor air temperature and room temperature is low for cooling operation, indoor unit can not operate in cool-
ing, and dehumidifying. In this case, the units operate in heating to rise the room temperature, and after that start dehumid-
ifying operation.
(15) Outline of automatic operation
(ii) SRK20, 25, 35, 50ZM-S, 71ZM-S series
(a) Determination of operation mode
Indoor air temperature (˚C)
(b)
(i)
(ii)
on the
(iii)
(c)
(d)
Cooling
Setting
Dehumidifying
temperature
Heating
Indoor unit fan speed
D C
ULo(Lo) speed
STOP
Minimum
STOP
Setting temperature
Difference between Setting temperature and return temperature
27.5
25.5
18.0
–6 –5 –4
Area
B A
Me speed
Limited Lower than
normal cooling operation
Limited
Lower than the speed in "Area A"
A Dehumidifying
Heating
18
Outdoor air temperature (˚C)
Signals of wireless remote control (Display)
±0
–3 –2 –1
166
- -
'17 • SCM-T-225
Cooling
30
+1 +2 +3 +4 +5 +6