'20 • SR-SM-285
-
41
-
(b) Detail of operation
1) The outdoor fan is stepped up by 3 speed step. (Upper limit 8th speed)
2) The lower limit of compressor command speed is set to 30 or 45 rps and even if the calculated result becomes lower
than that after fuzzy calculation, the speed is kept to 30 or 45 rps. However, when the thermo OFF, the speed is re-
duced to 0 rps.
(c) Reset conditions
When either of the following condition is satisfied
1)
The outdoor air temperature is lower than 40ºC.
2)
The compressor command speed is 0 rps.
(3)
(a)
(b)
(c)
6
6
6
30
Range A
TH1(˚C)
P1
47
53
48
53
P3
53
63
55
63
P2
50
58
53
58
25
35
Range B
Range A
Range B
First time
After the
second times
Outdoor air temperature (˚C)
A
C
E
D
B
F
0
22
-8
25
3
-5
5
25
-2
28
8
1
●Values of A, B, C, D, E, F
Outdoor air temperature
(°C)
Upper 2
Lower 2
ON
ON
Upper 3
Lower 3
ON
Upper 1
Lower 1
C
A
OFF
E
D
B
F
Compressor speed: Upper/lower limit (rps)
Upper 2 Lower 3 Upper 3
Lower 2
Lower 1
Upper 1
Range A
Range B
50
50
50
44
60
30
Release
26
24
Indoor air temperature (
℃
Range A
Range B
(4) Cooling low outdoor temperature protective control
(a) Operating conditions
When the outdoor air temperature (TH3) is 22ºC or lower continues for 20 seconds while the compressor com-
mand speed is other than 0 rps
(b) Detail of operation
1)
The lower limit of the compressor command speed is set to 50
〈44〉
(30) rps and even if the speed becomes
lower than 50
〈44〉
(30) rps, the speed is kept to 50
〈44〉
(30) rps. However, when the thermo OFF, the speed is
reduced to 0 rps.
2)
The upper limit of the compressor command speed is set to 50
〈
50
〉
(60) rps and even if the calculated result be-
comes higher than that after fuzzy calculation, the speed is kept to 50
〈
50
〉
(60) rps.
Notes (1) Values in
〈
〉
are for outdoor air temperature is A or BºC
(2) Values in ( ) are for outdoor air temperature is C or DºC
Summary of Contents for SRR25ZS-W
Page 79: ... 20 SR SM 285 78 ...
