-
63
-
27.5
25.5
19.5
18
30
2.6.10 Outline of automatic operation
(1) Determination of operation mode
The unit checks the indoor temperature and the outdoor air temperature, determines the operation mode, and then begins in the
automatic operation.
Heating
Dehumidifying
Cooling
Indoor air temperature (˚C)
Outdoor air temperature (˚C)
(2)
The unit checks the temperature every hour after the start of operation and, if the result of check is not same as the previous op-
eration mode, changes the operation mode.
(3)
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.
(4)
Setting temperature can be adjusted within the following range. There is the relationship as shown below between the signals of
the wireless remote controller and the setting temperature.
2.6.11 Protective control function
(1) Frost prevention control
(During cooling or dehumidifying)
(a) Operating conditions
1) Indoor heat exchanger temperature (Th2) is lower than 5ºC.
2) 5 minutes after reaching the compressor command speed except 0 rps.
(b) Detail of anti-frost operation
(c) Reset conditions:
When either of the following condition is satisfied.
1)
The indoor heat exchanger temperature (Th2) is 8ºC or higher.
2)
The compressor command speed is 0 rps.
Indoor heat exchanger
temperature (ºC)
2.5
5
8
0 rps
Lower
limit
speed
compressor
command
speed
Notes (1) When the indoor heat exchanger temperature is in the range of 2.5~5 ºC, the speed is reduced by 4 rps at each 20 seconds.
(2) When the temperature is lower than 2.5 ºC, the compressor is stopped.
(3) When the indoor heat exchanger temperature is in the range of 5~8 ºC, the compressor command speed is been maintained.
Indoor heat exchanger
temperature
Item
5°C or lower
2.5°C or lower
Lower limit of compressor command speed
22 rps (model 50 : 25 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
Signals of wireless remote controller (Display)
–6
–5
–4
–3
–2
–1
±
0
+1
+2
+3
+4
+5
+6
Setting
temperature
Cooling
18
19
20
21
22
23
24
25
26
27
28
29
30
Dehumidifying
19
20
21
22
23
24
25
26
27
28
29
30
31
Heating
20
21
22
23
24
25
26
27
28
29
30
31
32
Unit : ºC