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Daikin VRV III-S RXYMQ36 48PVJU Service Manual: Compressor Pi Control

60 hz.
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SiUS34-907
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]
Controls compressor capacity to adjust Te to achieve
target value (TeS).
Te setting (Set in Set-up mode 2)
L
M (Normal)
(factory
setting)
3
[Heating operation]
Controls compressor capacity to adjust Tc to achieve
target value (TcS).
Tc setting
L
M (Normal)
(factory
setting)
43
46
RXYMQ36 · 48P
STn
INV.(Full-load) INV.(Unload)
1
2
3
4
5
6
52.0Hz
7
57.0Hz
8
62.0Hz
9
68.0Hz
10
74.0Hz
∗ 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.
Function
H
6
9
H
49
STn
36.0Hz
11
39.0Hz
12
43.0Hz
13
47.0Hz
14
52.0Hz
15
57.0Hz
16
64.0Hz
17
71.0Hz
18
78.0Hz
19
20
Te : Low pressure equivalent saturation temperature (°F)
TeS : Target Te value
(Varies depending on Te setting, operating frequency, etc.)
Tc : High pressure equivalent saturation temperature (°F)
TcS : Target Tc value
(Varies depending on Tc setting, operating frequency, etc.)
INV.(Full-load) INV.(Unload)
80.0Hz
86.0Hz
92.0Hz
98.0Hz
104.0Hz
110.0Hz
116.0Hz
122.0Hz
128.0Hz
134.0Hz
Basic Control
STn
INV.(Full-load) INV.(Unload)
21
140.0Hz
22
146.0Hz
23
152.0Hz
24
158.0Hz
25
164.0Hz
26
170.0Hz
27
175.0Hz
28
180.0Hz
29
185.0Hz
30
190.0Hz
31
195.0Hz
33

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  • cp shukla Feb 16, 2016 06:50:
    RXYQ18PAY6 service manual & vrv Fulform