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(20) Outline of dehumidifying (DRY) operation
(d) Countermeasure for excessive temperature rise
If it feels excessive temperature rise in heating operation, setting temperature can be lower.
(a) Purpose of DRY mode
The purpose is "Dehumidification", and not to control the humidity to the target condition.
Indoor/outdoor unit control the operation condition to reduce the humidity, and also prevent over cooling.
(19) Outline of cooling operation
(b) Outline of control
(a) Operation of major functional components in cooling mode
(i) Indoor unit fan speed and compressor are controlled by the area which is selected by the temperature difference.
Compressor
Indoor fan motor
Outdoor fan motor
Indoor
fan speed
4-way valve
(b) Detail of control in each mode (Pattern)
(i)
Fuzzy operation
Compressor
speed
Fan speed
(ii) The indoor unit checks the current area by every 5 minutes, and operates by the next checking.
Auto
HI
(c) Other
MED
When the outdoor air temperature and room air temperature are low in cooling operation, indoor unit can not operate in cooling, and
LO
dehumidifying. In this case, the unit operates in heating to rise the room air temperature and after that start dehumidifying operation.
ULO
(21) Outline of automatic operation
(a) Determination of operation mode
(a) Determination of operation mode
Operation mode is determined by room air temperature and outdoor air temperature as following.
Room air
temperature (˚C)
Indoor air temperature (˚C)
(b) Operation mode is changes when keep cooling and heating thermostat off 20 minutes and be satisfied with following conditions.
If the setting temperature is changed with the remote control, the operation mode is judged immediately.
(b)
(i)
※It can not be changed to heating mode if outdoor air temperature is 28℃ or higher.
(ii)
When both the indoor and the outdoor air temperatures are in the range "A", cooling or heating is switched depending on
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
the difference between the setting temperature and the indoor air temperature.
selected during heating, cooling or DRY mode, the unit is operated in the previous operation mode.
When the operation mode has been judged following the change of setting temperature with the remote control, the hourly j-
(iii)
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals
udgment of operation mode is cancelled.
of the wireless remote control and the setting temperature.
(c)
Cooling
(d)
Setting
temperature
Heating
Note Setting temperature can be set in 0.5 ℃ increments.
(e) When the unit is operated automatically with the wired remote control, the cooling operation is controlled according to the
display temperatures while the setting temperature is compensated by
Cooling
Setting
Dehumidifying
temperature
Heating
Thermostat ON
Indoor fan speed
ON
D
C
ON
ON
ULo(Lo) speed
OFF
Stop
Minimum
Stop
Setting temperature
Difference between set temperature and room air temperature
Model
SRK15
15-66rps
15-66rps
15-52rps
15-42rps
15-34rps
SP
Heating
27.5
25.5
Outdoor air temperature (˚C)
18.0
Keep operation
mode
Heating
SP ＋ 1
SP − 1
Room air temperature (˚C)
18
19
20
18
19
20
20
21
22
–6
–5
Cooling
Thermostat OFF
OFF
Area
B
A
ON
Me speed
OFF
(few minutes ON)
(few minutes ON)
OFF
Limited （Lower than
normal cooling operation）
Limited
（Lower than the speed in"Area A"）
SRK20
SRK25
15-76rps
15-70rps
15-70rps
15-76rps
15-56rps
15-60rps
15-45rps
15-52rps
15-36rps
15-46rps
Cooling
SP: Setting temperature
28
A
Dehumidifying
Heating
Cooling
18
Outdoor air temperature (˚C)
SP: Setting temperature
Signals of wireless remote control (Display)
24
21
22
23
24
21
22
23
26
23
24
25
Signals of wireless remote control (Display)
＋
2℃ during heating.
±0
–4
–3
–2
–1
13
-
-
'22 • SRK-SM-349
'09•SRK-DB-087D
Failure
OFF
OFF
OFF
OFF
SRK35
15-98rps
15-98rps
15-80rps
15-60rps
15-46rps
Cooling
30
25
26
27
28
25
26
27
28
27
28
29
30
+1
+2
+3
SRK50
20-100rps
20-100rps
20-82rps
20-66rps
20-40rps
Unit : ℃
29
30
29
30
31
32
+4
+5
+6
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