Outline of Control (Indoor Unit)
SiUS342004EB
111
Part 4 Functions and Control
Note(s)
9.3 Remote Controller Thermistor
Temperature is controlled by both the remote controller thermistor and suction air thermistor for the
indoor unit. (This is however limited to when the field setting for the remote controller thermistor is
set to Use.)
When fresh air intake kit is used, outdoor air is mixed with indoor air, and the room temperature
may not reach the set temperature, since TS and TH1 do not enter the area in which remote
controller thermistor can be used. In such case, install the remote sensor (optional accessory) in
your room, and set the field settings to not use the remote controller thermistor.
FXTQ-TA, FXTQ-TB, and CXTQ-TA models do not have this control because they do not have
suction air thermistor. The thermistor is selectable manually when remote sensor (optional
accessory) is installed.
Cooling
If there is a significant difference in the set temperature and the suction temperature, fine
adjustment control is carried out using a suction air thermistor, or using the remote controller
thermistor near the position of the user when the suction temperature is near the set temperature.
Assuming the set temperature in the figure above is 24
C (75
F), and the suction
temperature has changed from 18
C (64
F) to 30
C (86
F) (A
F):
(This example also assumes there are several other air conditioners, and the suction temperature
changes even when the thermostat is off.)
Suction air thermistor is used for temperatures from 18°C (64°F) to 23°C (73°F) (A
C).
Remote controller thermistor is used for temperatures from 23°C (73°F) to 27°C (81°F) (C
E).
Suction air thermistor is used for temperatures from 27°C (81°F) to 30°C (86°F) (E
F).
Range in
w
hich remote controller
thermistor can be used
Range in
w
hich
suction air thermistor
can be used
Differential
Set temperature (Ts)
12
14
16
1
8
20
22
24
26
2
8
30
32
34
53.6
57.2
60.
8
64.4
6
8
.0
71.6
75.2
7
8
.
8
8
2.4
8
6.0
8
9.6
93.2
°
C
°
F
°
C
32
30
2
8
26
24
22
20
1
8
16
°
F
8
9.6
8
6.0
8
2.4
7
8
.
8
75.2
71.6
6
8
.0
64.4
60.
8
TH1 = Ts + 1 (
°
C)
TH1 = Ts + 1.
8
(
°
F)
TH1 = Ts + 3 (
°
C)
TH1 = Ts + 5.4 (
°
F)
TH1 = Ts – 3 (
°
C)
TH1 = Ts – 5.4 (
°
F)
TH1 = Ts – 1 (
°
C)
TH1 = Ts – 1.
8
(
°
F)
Suction air temperature (TH1)
Summary of Contents for VRV RXYQ72-384XAYCA
Page 1: ...Service Manual RXYQ72 384XAYCA RXYQ72 384XBYCA Heat Pump 60 Hz SiUS342004EB...
Page 395: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 388 FXFQ07 09 12 15 18 24 30 36 48TVJU 3D086460B...
Page 397: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 390 FXZQ05 07 09 12 15 18TAVJU 3D110443A...
Page 401: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 394 FXEQ07 09 12 15 18 24PVJU 3D098557A...
Page 402: ...Wiring Diagrams SiUS342004EB 395 Part 7 Appendix FXDQ07 09 12 18 24MVJU C 3D050501C...
Page 409: ...SiUS342004EB Wiring Diagrams Part 7 Appendix 402 FXHQ12 24 36MVJU 3D048116C...
Page 410: ...Wiring Diagrams SiUS342004EB 403 Part 7 Appendix FXAQ07 09 12 18 24PVJU 3D075354F...
Page 418: ...Wiring Diagrams SiUS342004EB 411 Part 7 Appendix VAM1200GVJU 3D073270D...
