Si18-525B
Basic Control
Function
109
2.2
Compressor PI Control
Compressor PI Control
Carries out the compressor capacity PI control to maintain Te at constant during cooling
operation and Tc at constant during heating operation to ensure stable unit performance.
[Cooling operation]
Te changes corresponding to the capacity which indoor units require the above as the initial
value. (However -7
≤
Te
≤
15)
[Heating operation]
Tc changes corresponding to the capacity which indoor units require the above as the initial
value. (However 42
≤
Tc
≤
51)
Controls compressor capacity to adjust Te to
achieve target value (TeS).
Te : Low pressure equivalent saturation
temperature (°C)
TeS initial value
TeS : Target Te value
(Varies depending on Te setting, operating
frequency, etc.)
Condition
L
M (Normal)
(factory setting)
H
∆
D up
3
6
9
∆
D keep
12
12
12
∆
D down
12
12
13
Controls compressor capacity to adjust Tc to
achieve target value (TcS).
Tc : High pressure equivalent saturation
temperature (°C)
TcS initial value
TcS : Target Tc value
(Varies depending on Tc setting, operating
frequency, etc.)
L
M (Normal)
(factory
setting)
H
43
46
49
RMK(X)S112 · 140 · 160D, RMKD112 · 140 · 160D
STEP
INV
1
52Hz
2
57Hz
3
62Hz
4
68Hz
5
74Hz
6
80Hz
7
86Hz
8
92Hz
9
98Hz
10
104Hz
11
111Hz
12
118Hz
13
124Hz
14
129Hz
15
134Hz
STEP
INV
16
140Hz
17
146Hz
18
152Hz
19
158Hz
20
164Hz
21
170Hz
22
175Hz
23
180Hz
24
185Hz
25
190Hz
∗
Compressors may operate in a pattern other than those listed in above tables subject to the operating conditions.
Summary of Contents for D-Series
Page 1: ...Si18 525B Applied Models Super Multi Plus Cooling only Super Multi Plus Heat Pump D Series ...
Page 33: ...List of Functions Si18 525B 20 List of Functions ...
Page 71: ...Specifications Si18 525B 58 Specifications ...
Page 117: ...Refrigerant Flow for Each Operation Mode Si18 525B 104 Refrigerant Circuit ...
Page 171: ...Indoor Unit SkyAir Models Si18 525B 158 Function ...
Page 207: ...Test Operation and Field Setting for RA Indoor Unit Si18 525B 194 Test Operation ...
Page 336: ...Si18 525B Service Check Function Troubleshooting 323 ...
Page 469: ...Wiring Diagrams Si18 525B 456 Appendix ...
Page 475: ...Si18 525B vi Index ...
