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51
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'10 • SRK-T-098
'09•SRK-DB-087D
(d) Cooling low outdoor air temperature protective control
1)
Operating conditions:
2)
Detail of operation:
C
D
A
B
OFF
E
F
Upper limit 50 rps
Lower limit 44 rps
ON
ON
Upper limit 50 rps
Lower limit 50 rps
ON
Upper limit 60 rps
Lower limit 30 rps
Outdoor air temperature.(°C)
3)
Reset conditions:
(e) Heating high pressure control
1)
Purpose:
2)
Detector:
3)
Detail of operation:
A
B
C
D
Indoor heat exchanger temperature(°C)
4rps
(1)
8rps
(2)
8rps
(2)
4rps
(1)
0rps
After lapse of 20 sec. or over
(3)
After lapse of 20 sec. or over
(3)
After lapse of 20 sec. or over
(3)
lower limit
speed 30 rps
(Example) Fuzzy
Temperature list
A
B
C
D
RPSmin < 50
50 <
= RPSmin < 91
91 <
= RPSmin < 97
97 <
= RPSmin < 100
100 <
= RPSmin < 115
115 <
= RPSmin
First time
Since the
seconds times
Outdoor air temperature (˚C)
A
B
C
D
E
F
a)
b)
a)
b)
than 50 <44> (30) rps, the speed is kept to 50 <44> (30) rps. However, when the thermo becomes OFF,the speed is
'09•SRK-DB-087D
(12)
ޓ
Protective control function
(a) Frost prevention control
1)
Operating conditions
2)
Detail of anti-frost operation
3)
Reset conditions:
Indoor heat exchanger
temperature (ºC)
2.5
5
8
0 rps
Lower
limit
speed
compressor
command
speed
(b) Cooling overload protective control
1)
Operating conditions:
2)
Detail of operation
3)
Reset conditions:
(c) Cooling high pressure control
1)
Purpose:
2)
Detector:
3)
Detail of operation:
53
58
63
Outdoor heat exchanger temperature (°C)
6rps
(1)
6rps
(1)
0rps
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
After lapse of 30 sec. or over
(3)
lower limit
speed 30 rps
(Example) Fuzzy
Indoor heat exchanger
temperature
Item
5°C or lower
2.5°C or lower
Lower limit of compressor command speed
Indoor fan
Outdoor fan
4-way valve
Item
SRK25, 35ZJ-S
Outdoor air temperature
Lower limit speed
Model
a)
b)
a)
b)
a)
b)
a)
b)
more, or 47ºC or more with the compressor running, the lower limit
The lower limit of compressor command speed is set to 30 or 40 rps and even if the calculated result becomes lower
than that after fuzzy calculation, the speed is kept to 30 or 40 rps. However, when the thermo becomes OFF, the speed
is reduced to 0 rps.
'09•SRK-DB-087D
(b)
1)
2)
3)
(c)
(d)
27.5
25.5
18.0
18
30
(10)
ޓ
Outline of cooling operation
(a)
ޓ
Operation of major functional components in Cooling mode
(b) Detail of control in each mode (Pattern)
1)
Fuzzy operation
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
(few minutes ON)
OFF
(few minutes ON)
ON
ON
OFF
Thermostat ON
Thermostat OFF
Failure
Cooling
Compressor
Indoor fan motor
Outdoor fan motor
4-way valve
20~98rps
20~98rps
20~58rps
20~38rps
SRK35ZJ-S
20~74rps
20~74rps
20~55rps
20~34rps
SRK25ZJ-S
Model
Fan speed
Auto
MED
HI
LO
(11)
ޓ
Outline of automatic operation
(a) Determination of operation mode
Heating
Dehumidifying
Cooling
Indoor air temperature (˚C)
Outdoor air temperature (˚C)
Signals of wireless remote controller (Display)
–6
–5
–4
–3
–2
–1
±
0
+1
+2
+3
+4
+5
+6
Setting
temperature
Cooling
Dehumidifying
Heating
A
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 controller, the hourly
judgment of operation mode is cancelled.
