![background image](http://html1.mh-extra.com/html/daikin/ftks50bvmb/ftks50bvmb_service-manual_501473109.webp)
Basic Control
SiEN18-622
96
Function
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)
RMK(X)S112 · 140 · 160E
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
Δ
D up
3
6
9
Δ
D keep
12
12
12
Δ
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
STn
INV(Fullload) INV(Unload)
STn
INV(Fullload) INV(Unload)
STn
INV(Fullload) INV(Unload)
1
36.0Hz
11
80.0Hz
21
140.0Hz
2
39.0Hz
12
86.0Hz
22
146.0Hz
3
43.0Hz
13
92.0Hz
23
152.0Hz
4
47.0Hz
14
98.0Hz
24
158.0Hz
5
52.0Hz
15
104.0Hz
25
164.0Hz
6
52.0Hz
57.0Hz
16
110.0Hz
26
170.0Hz
7
57.0Hz
64.0Hz
17
116.0Hz
27
175.0Hz
8
62.0Hz
71.0Hz
18
122.0Hz
28
180.0Hz
9
68.0Hz
78.0Hz
19
128.0Hz
29
185.0Hz
10
74.0Hz
20
134.0Hz
30
190.0Hz
31
195.0Hz
∗
Compressors may operate in a pattern other than those listed in above tables subject to the operating conditions.
Selection of full load operation to/from unload operation is made with the unload circuit solenoid valve
(Y3S=SVUL). The full load operation is performed with the SVUL set to OFF, while the unload operation is
performed with the SVUL set to ON.
Summary of Contents for FTKS50BVMB
Page 1: ...SiEN18 622 E Series Service Manual Applied Models zSuper Multi Plus Cooling Only Heat Pump ...
Page 105: ...Refrigerant Flow for Each Operation Mode SiEN18 622 92 Refrigerant Circuit ...
Page 157: ...Indoor Unit SkyAir Models SiEN18 622 144 Function ...
Page 312: ...SiEN18 622 Ceiling Mounted Cassette Type System Configuration 300 ...
Page 424: ...Method of Replacing The Inverter s Power Transistors Modules SiEN18 622 412 Troubleshooting ...
Page 446: ...Wiring Diagrams SiEN18 622 434 Appendix ...
Page 452: ...SiEN18 622 vi Index ...