Mitsubishi Heavy Industries FDT90VNPWVH Service Manual page 36

4-way valve
(b) Details of control at each operation mode (pattern)
(i) Fuzzy operation
Fan speed
AUTO
HI
MED
LO
ULO
(ii) Hot keep operation
(13) Outline of cooling operation
(13) Outline of cooling operation
(a) Operation of major functional components in cooling mode
(a) Operation of major functional components in cooling mode
Compressor
Compressor
Indoor fan motor
Indoor fan motor
Outdoor fan motor
Outdoor fan motor
However, if the fan speed setting is HI and room temperature is 19
4-way valve
4-way valve
(b) Detail of control in each mode (Pattern)
(b) Detail of control in each mode (Pattern)
1) Fuzzy operation
1) Fuzzy operation
Fan speed
Fan speed
AUTO
AUTO
HI
HI
MED
MED
LO
LO
ULO
ULO
(14) Outline of dry(dehumidifying) operation
(15) Outline of automatic operation
(a) Purpose of DRY mode
(15) Outline of automatic operation
(a) Determination of operation mode
The purpose is "Dehumidification", and not to control the humidity to the target condition.
(a) Determination of operation mode
Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.
(b) Outline of control
(i) Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.
Indoor fan speed
Indoor air temperature (˚C)
Indoor fan
Indoor air temperature (˚C)
speed
(b)
Compressor
(b)
speed
(i)
(i)
(ii) When both the indoor and the outdoor air temperatures are in the range "A", cooling or heating is switched depending on
(ii) When both the indoor and the outdoor air temperatures are in the range "A", cooling or heating is switched depending on
(ii) The indoor unit check the current area by every 5 minutes, and operate by the next checking.
the difference between the setting temperature and the indoor air temperature.
(c) Other
the difference between the setting temperature and the indoor air temperature.
When the operation mode has been judged following the change of setting temperature with the remote control, the hourly
(iii)
When the outside temperature and room temperature is low for cooling operation, indoor unit can not operate in cooling, and
(iii) When the operation mode has been judged following the change of setting temperature with the remote control, the hourly
dehumidifying. In this case, the units operate in heating to rise the room temperature and after that start dehumidifying operation. judgment of operation mode is cancelled.
judgment of operation mode is cancelled.
(c)
(c)
(d)
(d)
ON
Model
SRK100ZR-W
12-120rps
12-120rps
12-120rps
12-106rps
12-70rps
Thermostat ON
Thermostat ON
ON
ON
ON
ON
ON
ON
OFF
OFF
Model
SRK100ZR-W
Model
SRK100ZR-W
12-110rps
12-110rps
12-110rps
12-110rps
12-88rps
12-88rps
12-72rps
12-72rps
12-40rps
12-40rps
27.5
27.5
25.5
D C
25.5
18.0
ULo(Lo) speed
18.0
STOP
Minimum
STOP
Set temperature
Difference between set temperature and return temperature
-
ON
Cooling
Cooling
Thermostat OFF
Thermostat OFF
OFF
OFF
ON
ON
OFF
(few minutes ON) (few minutes ON)
OFF
(few minutes ON) (few minutes ON)
or higher, this control is not executed.
OFF
OFF
Area
B A
Me speed
A Dehumidifying
A Dehumidifying
Heating
Heating
18
Limited （Lower than
18
Outdoor air temperature (˚C)
normal cooling operation）
Outdoor air temperature (˚C)
Limited
（Lower than the speed in"Area A"）
35
-
OFF
(3 minutes ON)
'19 • PAC-SM-334
'09•SRK-DB-087D
'09•SRK-DB-087D
fan motor
Failure
Failure
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
Cooling
Cooling
30
30