Mitsubishi Heavy Industries SRK60ZSX-S Technical Manual page 48

(iii) Reset conditions
When either of the following condition is satisfied.
1) The outdoor air temperature (TH2) is D°C or higher.
2) The compressor speed is 0 rps.
(f ) Heating high pressure control
(i) Purpose
(f) Heating high pressure control
(ii) Detector
(i) Purpose:
(ii) Detector:
(iii) Detail of operation
(iii) Detail of operation:
(Example)
(Example) Fuzzy
Compressor
speed
When the indoor heat exchanger temperature is in the range of A-B °C, if the compressor speed is been maintained and the operation has continued for more
than 20 seconds at the same speed, it returns to the normal heating operation.
fan
fan
Model SRK50
Temperature list
Temperature list
Models SRK20, 25, 35
RPSmin < 40
40 < = RPSmin < 80
RPSmin < 50
RPSmin < 50
80 < = RPSmin < 90
50 < = RPSmin < 91
50 < RPSmin < 115
90 < = RPSmin < 102
91 < = RPSmin < 97
115 < =
RPSmin < 120
102 < = RPSmin
97 < = RPSmin < 100
120 < =
RPSmin
100 < = RPSmin < 115
115 < = RPSmin
Models SRK71, 80ZR-S
(g) Heating overload protective control
(i) Indoor fan speed
RPSmin < 90
90 < RPSmin < 108
1) Operating conditions
108 < =
RPSmin < 120
When the outdoor air temperature (TH2) is 17°C or higher continues for 30 seconds while the compressor speed other than 0 rps.
120 < = RPSmin
2) Detail of operation
The indoor fan speed is stepped up by 1 speed step. (Upper limit 10th speed)
3) Reset conditions
The outdoor air temperature (TH2) is lower than 16°C.
(ii) Outdoor unit side
1) Operating conditions
When the outdoor air temperature (TH2) is 13°C or higher continues for 30 seconds while the compressor speed other than 0 rps.
2) Detail of operation
a) Taking the upper limit of compressor speed at 90 rps or 50 (75) rps, if the output speed obtained with the fuzzy
calculation exceeds the upper limit, the upper limit value is maintained.
b) The lower limit of compressor speed is set to 25 (30) rps or 35 (40) rps and even if the calculated result becomes
lower than that after fuzzy calculation, the speed is kept to 25 (30) rps or 35 (40) rps. However, when the
thermostat OFF, the speed is reduced to 0 rps.
c)
d)
OFF
3) Reset conditions
The outdoor air temperature (TH2) is lower than 11°C.
• Model SRK50
1) Operating conditions
When the outdoor air temperature (TH2) is 11ºC or higher continues for 30 seconds while the compressor speed other than 0 rps.
2) Detail of operation
a) Taking the upper limit of compressor speed range at 78 rps, if the output speed obtained with the fuzzy calculation
temperature
After lapse of 20 sec. or over
After lapse of E sec. or over
After lapse of 20 sec. or over
After lapse of E sec. or over
After lapse of 20 sec. or over
After lapse of E sec. or over
A
A
Indoor heat exchanger temperature(°C)
Indoor heat exchanger temperature (°C)
5 seconds
E
speed
A B
49 53
A
A
53 57
48 53
45
53 - 47 57 - 51
48.5 56
45
47 - 41 51 - 45
48.5 56 - 52.5
45 - 43 52 - 50
41 45
48.5 52.5 - 50.8
43
48.5 - 40.1 50.8 - 42
40.1 42
A
45
45 - 44 52 - 48
44 - 43 48 - 45
43
rps.
fan speed is 3rd (models SRK50, 60 : 2nd)
Upper 50 (75) rps
Lower 35 (40) rps
Upper 90 rps
Lower 25 (30) rps
11 13 16
Outdoor air temperature (°C)
4rps 8rps
(3) (1)
4rps 8rps
(3) (1)
4rps
(1)
(3)
4rps
(1)
(3)
lower limit
(3)
speed 35 rps
lower limit
(3)
speed F rps
B C
B C
B - C
-
C - D
-
-
fan
fan
C
55
B C
B C
59
55
54.5
52
59 - 53
58
52 57
53 - 47
58
57 - 55
47
58 - 56.2
50 55
56.2 - 47.3
47.3
B C
52 57
57 - 52
52 - 48
45 48
Note(1) Values in ( ) are for the models SRK50, 60.
17
47
- -
'17 • SRK-T-203
(2)
(2)
8rps
(2)
E
8rps
(2)
Model 63 10
0rps
20
Model 71, 80
0rps
D
D
'09•SRK-DB-087D
10
E
10
E
D
58
D
D
62
58
57
58
61
61
51
61
61 - 59
51
61
59
61
61
D
56.5
51.5
51.5
F
35
30