-
71
-
'17 • SRK-T-206
(d) Cooling high pressure control
(i) Purpose:
Prevents anomalous high pressure operation during cooling.
(ii) Detector:
Outdoor heat exchanger sensor (TH1)
(iii) Detail of operation:
A
B
C
Outdoor heat exchanger temperature(°C)
8rps
(1)
8rps
(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)
(Example) Fuzzy
Notes (1) When the outdoor heat exchanger temperature is in the range of B-C ºC, the speed is reduced by 8 rps at each 20 seconds.
(2) When the temperature is C ºC or higher, the compressor is stopped.
(3) When the outdoor heat exchanger temperature is in the range of A-B ºC, if the compressor command speed is been maintained and the operation has
continued for more than 20 seconds at the same speed, it returns to the normal cooling operation.
●
Temperature list
A
B
C
Outdoor air temperature >= 32 ºC
50
52
56
Outdoor air temperature < 32 ºC
42
44
50
'09•SRK-DB-087D
(i) Operating conditions:
(ii) 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
ࠝ
44
ࠞ
rps
ON
Upper limit 60 rps
Lower limit 30 rps
Outdoor air temperature (°C)
(iii) Reset conditions:
(f) Heating high pressure control
(i) Purpose:
(ii) Detector:
(iii) Detail of operation:
A
B
C
D
Indoor heat exchanger temperature(°C)
4rps
(1)
8rps
(2)
8rps
(2)
4rps
(1)
0rps
After lapse of 10 sec. or over
(3)
After lapse of 10 sec. or over
(3)
After lapse of 10 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
After the
second times
Outdoor air temperature (˚C)
A
B
C
D
E
F
1)
2)
1)
2)
The lower limit of the compressor command speed is set to 50 [44] <44> (30) rps and even if the speed becomes
lower than 50 [44] <44> (30) rps,the speed is kept to 50 [44] <44> (30) rps. However, when the thermo OFF, the
speed is reduced to 0 rps.
10
52
Notes(1) RPSmin: The lower one between the compressor command speed
54.5
54
55
Models SRK20, 25, 35
51.5
54.5
51.5 50
50
A
C
B
D
fan
fan
fan
(3) Values in [ ] are for the model SRK45.
Values of A, B, C, D, E, F (Models SRK20, 25, 35)
First time
After the
second times
Outdoor air temperature (˚C)
E
F
A
B
C
D
, E, F (Model SRK45)
0
5
7
2
16
9
19
11
25
22
28
25
(e) Cooling low outdoor air temperature protective control
'09•SRK-DB-087D
(i) Operating conditions:
(ii) 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
ࠝ
44
ࠞ
rps
ON
Upper limit 60 rps
Lower limit 30 rps
Outdoor air temperature (°C)
(iii) Reset conditions:
(f) Heating high pressure control
(i) Purpose:
(ii) Detector:
(iii) Detail of operation:
A
B
C
D
Indoor heat exchanger temperature(°C)
4rps
(1)
8rps
(2)
8rps
(2)
4rps
(1)
0rps
After lapse of 10 sec. or over
(3)
After lapse of 10 sec. or over
(3)
After lapse of 10 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
After the
second times
Outdoor air temperature (˚C)
A
B
C
D
E
F
1)
2)
1)
2)
The lower limit of the compressor command speed is set to 50 [44] <44> (30) rps and even if the speed becomes
lower than 50 [44] <44> (30) rps,the speed is kept to 50 [44] <44> (30) rps. However, when the thermo OFF, the
speed is reduced to 0 rps.
10
52
Notes(1) RPSmin: The lower one between the compressor command speed
54.5
54
55
Models SRK20, 25, 35
51.5
54.5
51.5 50
50
A
C
B
D
fan
fan
fan
(3) Values in [ ] are for the model SRK45.
Values of A, B, C, D, E, F (Models SRK20, 25, 35)
First time
After the
second times
Outdoor air temperature (˚C)
E
F
A
B
C
D
, E, F (Model SRK45)
0
5
7
2
16
9
19
11
25
22
28
25
'09•SRK-DB-087D
(b) Frost prevention control
(i) Operating conditions
(ii) Detail of anti-frost operation
(iii) Reset conditions:
Indoor heat exchanger
temperature (ºC)
2.5
5
8
0 rps
Lower
limit
speed
compressor
command
speed
(c) Cooling overload protective control
(i) Operating conditions:
(ii) Detail of operation
(iii) Reset conditions:
(d) Cooling high pressure control
(i) Purpose:
(ii) Detector:
(iii) 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 (model SRK50 : 29) 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
SRK20~35ZJ-S
SRK50ZJ-S
Outdoor air temperature
Lower limit speed
Model
1)
2)
1)
2)
1)
2)
1)
2)
more, or 47ºC or more (model SRK50 : 41ºC or more) with the compressor running, the lower
limit
41°C or more
29 rps
The lower limit of compressor command speed is set to 30 or 40 (model SRK50 : 29) rps and even if the calculated
result becomes lower than that after fuzzy calculation, the speed is kept to 30 or 40 (model SRK50 : 29) rps. Howev-
er, when the thermo OFF, the speed is reduced to 0 rps.
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