-
-
'15 • SR-T-185
(b) The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previ-
ous operation mode, changes the operation mode.
(c) When the unit is started again within one hour after the stop of automatic operation or when the automatic operation is
selected during heating, cooling or dehumidifying operation, the unit is operated in the previous operation mode.
(d) Setting temperature can be adjusted within the following range. There is the relationship as shown below between the
signals of the wireless remote control and the setting temperature.
(e) When the unit is operated automatically with the wired remote control connected, the cooling operation is controlled
according to the display temperatures while the setting temperature is compensated by +°C during dehumidifying or by
+°C during heating.
(14) Outline of automatic operation
(a) Determination of operation mode
The unit checks the indoor air temperature and the outdoor air temperature, determines the operation mode, and then be-
gins in the automatic operation.
27.5
25.5
19.5
18
A
30
Heating
Dehumidifying
Cooling
Indoor air temperature (˚C)
Outdoor air temperature (˚C)
(i)
(ii)
(iii)
When both the indoor and the outdoor air temperatures are in the range “A”, cooling or heating is switched depending on
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
judgment of operation mode is cancelled.
If the setting temperature is changed with the wireless remote control, the operation mode is judged immediately.
Signals of wireless remote control (Display)
–6
–5
–4
–3
–2
–1
±
0
+1
+2
+3
+4
+5
+6
Setting
temperature
Cooling
0
0
Dehumidifying
0
0
Heating
0
0
Unit : ºC
(a) Frost prevention control
(During cooling or dehumidifying)
(i) Operating conditions
) Indoor heat exchanger temperature (Th) is lower than ºC.
) minutes after reaching the compressor command speed except 0 rps.
(ii) Detail of anti-frost operation
(iii) Reset conditions:
When either of the following condition is satisfied.
)
The indoor heat exchanger temperature (Th) is ºC or higher.
)
The compressor command speed is 0 rps.
(15) Protective control function
Item
5°C or lower
2.5°C or lower
Lower limit of compressor command speed
rps
0 rps
Indoor fan
Depends on operation mode
Protects the fan tap just before
frost prevention control
Outdoor fan
Depends on command speed
Depends on stop mode
4-way valve
OFF
Indoor heat exchanger
temperature (ºC)
2.5
5
8
0 rps
Lower
limit
speed
compressor
command
speed
Notes () When the indoor heat exchanger temperature is in the range of .~ ºC, the speed is reduced by rps at each 0 seconds.
() When the temperature is lower than . ºC, the compressor is stopped.
() When the indoor heat exchanger temperature is in the range of ~ ºC, the compressor command speed is been maintained.
Indoor heat exchanger
temperature
